diff --git a/devtools/test_dashboard/devtools.js b/devtools/test_dashboard/devtools.js
index 6a779e9656e..1b79674e91f 100644
--- a/devtools/test_dashboard/devtools.js
+++ b/devtools/test_dashboard/devtools.js
@@ -17,8 +17,7 @@ var Tabs = {
         Plotly.setPlotConfig({
 
             // use local topojson files
-            topojsonURL: '../../node_modules/sane-topojson/dist/',
-
+            topojsonURL: "../../dist/topojson/",
             // register mapbox access token
             // run `npm run preset` if you haven't yet
             mapboxAccessToken: credentials.MAPBOX_ACCESS_TOKEN,
diff --git a/package-lock.json b/package-lock.json
index dfd1f8f8f10..ad8272de02a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,7 +27,6 @@
         "css-loader": "^7.1.2",
         "d3-force": "^1.2.1",
         "d3-format": "^1.4.5",
-        "d3-geo": "^1.12.1",
         "d3-geo-projection": "^2.9.0",
         "d3-hierarchy": "^1.1.9",
         "d3-interpolate": "^3.0.1",
@@ -67,6 +66,7 @@
         "@biomejs/biome": "1.8.3",
         "@plotly/mathjax-v2": "npm:mathjax@2.7.5",
         "@plotly/mathjax-v3": "npm:mathjax@^3.2.2",
+        "@turf/simplify": "^7.2.0",
         "amdefine": "^1.0.1",
         "assert": "^2.1.0",
         "browserify-transform-tools": "^1.7.0",
@@ -75,6 +75,7 @@
         "canvas": "^2.11.2",
         "check-node-version": "^4.2.1",
         "chttps": "^1.0.6",
+        "d3-geo": "^3.1.1",
         "deep-equal": "^2.2.3",
         "ecstatic": "^4.1.4",
         "esbuild": "^0.23.1",
@@ -104,6 +105,7 @@
         "karma-viewport": "1.0.2",
         "lodash": "^4.17.21",
         "madge": "^8.0.0",
+        "mapshaper": "^0.6.102",
         "minify-stream": "^2.1.0",
         "npm-link-check": "^5.0.1",
         "open": "^8.4.2",
@@ -1001,6 +1003,84 @@
       "resolved": "https://registry.npmjs.org/tinyqueue/-/tinyqueue-3.0.0.tgz",
       "integrity": "sha512-gRa9gwYU3ECmQYv3lslts5hxuIa90veaEcxDYuu3QGOIAEM2mOZkVHp48ANJuu1CURtRdHKUBY5Lm1tHV+sD4g=="
     },
+    "node_modules/@msgpackr-extract/msgpackr-extract-darwin-arm64": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-darwin-arm64/-/msgpackr-extract-darwin-arm64-3.0.3.tgz",
+      "integrity": "sha512-QZHtlVgbAdy2zAqNA9Gu1UpIuI8Xvsd1v8ic6B2pZmeFnFcMWiPLfWXh7TVw4eGEZ/C9TH281KwhVoeQUKbyjw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
+    },
+    "node_modules/@msgpackr-extract/msgpackr-extract-darwin-x64": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-darwin-x64/-/msgpackr-extract-darwin-x64-3.0.3.tgz",
+      "integrity": "sha512-mdzd3AVzYKuUmiWOQ8GNhl64/IoFGol569zNRdkLReh6LRLHOXxU4U8eq0JwaD8iFHdVGqSy4IjFL4reoWCDFw==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
+    },
+    "node_modules/@msgpackr-extract/msgpackr-extract-linux-arm": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-linux-arm/-/msgpackr-extract-linux-arm-3.0.3.tgz",
+      "integrity": "sha512-fg0uy/dG/nZEXfYilKoRe7yALaNmHoYeIoJuJ7KJ+YyU2bvY8vPv27f7UKhGRpY6euFYqEVhxCFZgAUNQBM3nw==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@msgpackr-extract/msgpackr-extract-linux-arm64": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-linux-arm64/-/msgpackr-extract-linux-arm64-3.0.3.tgz",
+      "integrity": "sha512-YxQL+ax0XqBJDZiKimS2XQaf+2wDGVa1enVRGzEvLLVFeqa5kx2bWbtcSXgsxjQB7nRqqIGFIcLteF/sHeVtQg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@msgpackr-extract/msgpackr-extract-linux-x64": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-linux-x64/-/msgpackr-extract-linux-x64-3.0.3.tgz",
+      "integrity": "sha512-cvwNfbP07pKUfq1uH+S6KJ7dT9K8WOE4ZiAcsrSes+UY55E/0jLYc+vq+DO7jlmqRb5zAggExKm0H7O/CBaesg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@msgpackr-extract/msgpackr-extract-win32-x64": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/@msgpackr-extract/msgpackr-extract-win32-x64/-/msgpackr-extract-win32-x64-3.0.3.tgz",
+      "integrity": "sha512-x0fWaQtYp4E6sktbsdAqnehxDgEc/VwM7uLsRCYWaiGu0ykYdZPiS8zCWdnjHwyiumousxfBm4SO31eXqwEZhQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "optional": true,
+      "os": [
+        "win32"
+      ]
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -1045,6 +1125,12 @@
         "node": ">=14"
       }
     },
+    "node_modules/@placemarkio/tokml": {
+      "version": "0.3.7",
+      "resolved": "https://registry.npmjs.org/@placemarkio/tokml/-/tokml-0.3.7.tgz",
+      "integrity": "sha512-pQaoQTBvDf7p7d/3ZHDaxWaU62guSYB9KQ6vvecshELunzpdN5tbgw0d+SVO1eYaTlrxX3Nvi7F9DI8FcoJePg==",
+      "dev": true
+    },
     "node_modules/@plotly/d3": {
       "version": "3.8.2",
       "resolved": "https://registry.npmjs.org/@plotly/d3/-/d3-3.8.2.tgz",
@@ -1145,6 +1231,18 @@
       "integrity": "sha512-+9jVqKhRSpsc591z5vX+X5Yyw+he/HCB4iQ/RYxw35CEPaY1gnsNE43nf9n9AaYjAQrTiI/mOwKUKdUs9vf7Xg==",
       "dev": true
     },
+    "node_modules/@tmcw/togeojson": {
+      "version": "5.8.1",
+      "resolved": "https://registry.npmjs.org/@tmcw/togeojson/-/togeojson-5.8.1.tgz",
+      "integrity": "sha512-2YNrbis3l5kS0XrYwiHEZcGwiRp0MJ5CvwGwtMWp2z2tsVlskeec2qgvKHnF0RCwI5GnjrrBOoKsWfndEnd3LA==",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      },
+      "peerDependencies": {
+        "@types/geojson": "*"
+      }
+    },
     "node_modules/@ts-graphviz/adapter": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/@ts-graphviz/adapter/-/adapter-2.0.3.tgz",
@@ -1276,38 +1374,105 @@
         "url": "https://opencollective.com/turf"
       }
     },
+    "node_modules/@turf/clean-coords": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/clean-coords/-/clean-coords-7.2.0.tgz",
+      "integrity": "sha512-+5+J1+D7wW7O/RDXn46IfCHuX1gIV1pIAQNSA7lcDbr3HQITZj334C4mOGZLEcGbsiXtlHWZiBtm785Vg8i+QQ==",
+      "dev": true,
+      "dependencies": {
+        "@turf/helpers": "^7.2.0",
+        "@turf/invariant": "^7.2.0",
+        "@types/geojson": "^7946.0.10",
+        "tslib": "^2.8.1"
+      },
+      "funding": {
+        "url": "https://opencollective.com/turf"
+      }
+    },
+    "node_modules/@turf/clone": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/clone/-/clone-7.2.0.tgz",
+      "integrity": "sha512-JlGUT+/5qoU5jqZmf6NMFIoLDY3O7jKd53Up+zbpJ2vzUp6QdwdNzwrsCeONhynWM13F0MVtPXH4AtdkrgFk4g==",
+      "dev": true,
+      "dependencies": {
+        "@turf/helpers": "^7.2.0",
+        "@types/geojson": "^7946.0.10",
+        "tslib": "^2.8.1"
+      },
+      "funding": {
+        "url": "https://opencollective.com/turf"
+      }
+    },
     "node_modules/@turf/helpers": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@turf/helpers/-/helpers-7.1.0.tgz",
-      "integrity": "sha512-dTeILEUVeNbaEeoZUOhxH5auv7WWlOShbx7QSd4s0T4Z0/iz90z9yaVCtZOLbU89umKotwKaJQltBNO9CzVgaQ==",
-      "license": "MIT",
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/helpers/-/helpers-7.2.0.tgz",
+      "integrity": "sha512-cXo7bKNZoa7aC7ydLmUR02oB3IgDe7MxiPuRz3cCtYQHn+BJ6h1tihmamYDWWUlPHgSNF0i3ATc4WmDECZafKw==",
       "dependencies": {
         "@types/geojson": "^7946.0.10",
-        "tslib": "^2.6.2"
+        "tslib": "^2.8.1"
+      },
+      "funding": {
+        "url": "https://opencollective.com/turf"
+      }
+    },
+    "node_modules/@turf/invariant": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/invariant/-/invariant-7.2.0.tgz",
+      "integrity": "sha512-kV4u8e7Gkpq+kPbAKNC21CmyrXzlbBgFjO1PhrHPgEdNqXqDawoZ3i6ivE3ULJj2rSesCjduUaC/wyvH/sNr2Q==",
+      "dev": true,
+      "dependencies": {
+        "@turf/helpers": "^7.2.0",
+        "@types/geojson": "^7946.0.10",
+        "tslib": "^2.8.1"
       },
       "funding": {
         "url": "https://opencollective.com/turf"
       }
     },
     "node_modules/@turf/meta": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@turf/meta/-/meta-7.1.0.tgz",
-      "integrity": "sha512-ZgGpWWiKz797Fe8lfRj7HKCkGR+nSJ/5aKXMyofCvLSc2PuYJs/qyyifDPWjASQQCzseJ7AlF2Pc/XQ/3XkkuA==",
-      "license": "MIT",
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/meta/-/meta-7.2.0.tgz",
+      "integrity": "sha512-igzTdHsQc8TV1RhPuOLVo74Px/hyPrVgVOTgjWQZzt3J9BVseCdpfY/0cJBdlSRI4S/yTmmHl7gAqjhpYH5Yaw==",
       "dependencies": {
-        "@turf/helpers": "^7.1.0",
+        "@turf/helpers": "^7.2.0",
         "@types/geojson": "^7946.0.10"
       },
       "funding": {
         "url": "https://opencollective.com/turf"
       }
     },
+    "node_modules/@turf/simplify": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@turf/simplify/-/simplify-7.2.0.tgz",
+      "integrity": "sha512-9YHIfSc8BXQfi5IvEMbCeQYqNch0UawIGwbboJaoV8rodhtk6kKV2wrpXdGqk/6Thg6/RWvChJFKVVTjVrULyQ==",
+      "dev": true,
+      "dependencies": {
+        "@turf/clean-coords": "^7.2.0",
+        "@turf/clone": "^7.2.0",
+        "@turf/helpers": "^7.2.0",
+        "@turf/meta": "^7.2.0",
+        "@types/geojson": "^7946.0.10",
+        "tslib": "^2.8.1"
+      },
+      "funding": {
+        "url": "https://opencollective.com/turf"
+      }
+    },
     "node_modules/@types/bluebird": {
       "version": "3.5.36",
       "resolved": "https://registry.npmjs.org/@types/bluebird/-/bluebird-3.5.36.tgz",
       "integrity": "sha512-HBNx4lhkxN7bx6P0++W8E289foSu8kO8GCk2unhuVggO+cE7rh9DhZUyPhUxNRG9m+5B5BTKxZQ5ZP92x/mx9Q==",
       "dev": true
     },
+    "node_modules/@types/concat-stream": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/@types/concat-stream/-/concat-stream-1.6.1.tgz",
+      "integrity": "sha512-eHE4cQPoj6ngxBZMvVf6Hw7Mh4jMW4U9lpGmS5GBPB9RYxlFg+CHaVN7ErNY4W9XfLIEn20b4VDYaIrbq0q4uA==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/cookie": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.4.1.tgz",
@@ -1329,6 +1494,15 @@
       "integrity": "sha512-/kYRxGDLWzHOB7q+wtSUQlFrtcdUccpfy+X+9iMBpHK8QLLhx2wIPYuS5DYtR9Wa/YlZAbIovy7qVdB1Aq6Lyw==",
       "peer": true
     },
+    "node_modules/@types/form-data": {
+      "version": "0.0.33",
+      "resolved": "https://registry.npmjs.org/@types/form-data/-/form-data-0.0.33.tgz",
+      "integrity": "sha512-8BSvG1kGm83cyJITQMZSulnl6QV8jqAGreJsc5tPu1Jq0vTSOiY/k24Wx82JRpWwZSqrala6sd5rWi6aNXvqcw==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/geojson": {
       "version": "7946.0.14",
       "resolved": "https://registry.npmjs.org/@types/geojson/-/geojson-7946.0.14.tgz",
@@ -1387,6 +1561,12 @@
       "resolved": "https://registry.npmjs.org/@types/pbf/-/pbf-3.0.5.tgz",
       "integrity": "sha512-j3pOPiEcWZ34R6a6mN07mUkM4o4Lwf6hPNt8eilOeZhTFbxFXmKhvXl9Y28jotFPaI1bpPDJsbCprUoNke6OrA=="
     },
+    "node_modules/@types/qs": {
+      "version": "6.9.18",
+      "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.18.tgz",
+      "integrity": "sha512-kK7dgTYDyGqS+e2Q4aK9X3D7q234CIZ1Bv0q/7Z5IwRDoADNU81xXJK/YVyLbLTZCoIwUoDoffFeF+p/eIklAA==",
+      "dev": true
+    },
     "node_modules/@types/sass": {
       "version": "1.45.0",
       "resolved": "https://registry.npmjs.org/@types/sass/-/sass-1.45.0.tgz",
@@ -1717,6 +1897,15 @@
         "@xtuc/long": "4.2.2"
       }
     },
+    "node_modules/@xmldom/xmldom": {
+      "version": "0.8.10",
+      "resolved": "https://registry.npmjs.org/@xmldom/xmldom/-/xmldom-0.8.10.tgz",
+      "integrity": "sha512-2WALfTl4xo2SkGCYRt6rDTFfk9R1czmBvUQy12gK2KuRKIpWEhcbbzy8EZXtz/jkRqHX8bFEc6FC1HjX4TUWYw==",
+      "dev": true,
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/@xtuc/ieee754": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/@xtuc/ieee754/-/ieee754-1.2.0.tgz",
@@ -1783,6 +1972,15 @@
         "acorn": "^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     },
+    "node_modules/adm-zip": {
+      "version": "0.5.16",
+      "resolved": "https://registry.npmjs.org/adm-zip/-/adm-zip-0.5.16.tgz",
+      "integrity": "sha512-TGw5yVi4saajsSEgz25grObGHEUaDrniwvA2qwSC060KfqGPdglhvPMA2lPIoxs3PQIItj2iag35fONcQqgUaQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=12.0"
+      }
+    },
     "node_modules/agent-base": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
@@ -1974,6 +2172,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
+      "dev": true
+    },
     "node_modules/assert": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/assert/-/assert-2.1.0.tgz",
@@ -2349,6 +2553,19 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/call-bind-apply-helpers": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz",
+      "integrity": "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==",
+      "dev": true,
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "function-bind": "^1.1.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/caniuse-lite": {
       "version": "1.0.30001651",
       "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001651.tgz",
@@ -2392,6 +2609,12 @@
         "element-size": "^1.1.1"
       }
     },
+    "node_modules/caseless": {
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
+      "integrity": "sha512-4tYFyifaFfGacoiObjJegolkwSU4xQNGbVgUiNYVUxbQ2x2lUsFvY4hVgVzGiIe6WLOPqycWXA40l+PWsxthUw==",
+      "dev": true
+    },
     "node_modules/chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -2886,6 +3109,19 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/cookies": {
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/cookies/-/cookies-0.8.0.tgz",
+      "integrity": "sha512-8aPsApQfebXnuI+537McwYsDtjVxGm8gTIzQI3FDW6t5t/DAhERxtnbEPN/8RX+uZthoz4eCOgloXaE5cYyNow==",
+      "dev": true,
+      "dependencies": {
+        "depd": "~2.0.0",
+        "keygrip": "~1.1.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -3116,11 +3352,15 @@
       "integrity": "sha512-J0piedu6Z8iB6TbIGfZgDzfXxUFN3qQRMofy2oPdXzQibYGqPB/9iMcxr/TGalU+2RsyDO+U4f33id8tbnSRMQ=="
     },
     "node_modules/d3-geo": {
-      "version": "1.12.1",
-      "resolved": "https://registry.npmjs.org/d3-geo/-/d3-geo-1.12.1.tgz",
-      "integrity": "sha512-XG4d1c/UJSEX9NfU02KwBL6BYPj8YKHxgBEw5om2ZnTRSbIcego6dhHwcxuSR3clxh0EpE38os1DVPOmnYtTPg==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/d3-geo/-/d3-geo-3.1.1.tgz",
+      "integrity": "sha512-637ln3gXKXOwhalDzinUgY83KzNWZRKbYubaG+fGVuc/dxO64RRljtCTnf5ecMyE1RIdtqpkVcq0IbtU2S8j2Q==",
+      "dev": true,
       "dependencies": {
-        "d3-array": "1"
+        "d3-array": "2.5.0 - 3"
+      },
+      "engines": {
+        "node": ">=12"
       }
     },
     "node_modules/d3-geo-projection": {
@@ -3141,6 +3381,26 @@
         "geostitch": "bin/geostitch"
       }
     },
+    "node_modules/d3-geo-projection/node_modules/d3-geo": {
+      "version": "1.12.1",
+      "resolved": "https://registry.npmjs.org/d3-geo/-/d3-geo-1.12.1.tgz",
+      "integrity": "sha512-XG4d1c/UJSEX9NfU02KwBL6BYPj8YKHxgBEw5om2ZnTRSbIcego6dhHwcxuSR3clxh0EpE38os1DVPOmnYtTPg==",
+      "dependencies": {
+        "d3-array": "1"
+      }
+    },
+    "node_modules/d3-geo/node_modules/d3-array": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-3.2.4.tgz",
+      "integrity": "sha512-tdQAmyA18i4J7wprpYq8ClcxZy3SC31QMeByyCFyRt7BVHdREQZ5lpzoe5mFEYZUWe+oq8HBvk9JjpibyEV4Jg==",
+      "dev": true,
+      "dependencies": {
+        "internmap": "1 - 2"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/d3-hierarchy": {
       "version": "1.1.9",
       "resolved": "https://registry.npmjs.org/d3-hierarchy/-/d3-hierarchy-1.1.9.tgz",
@@ -3167,6 +3427,19 @@
       "resolved": "https://registry.npmjs.org/d3-quadtree/-/d3-quadtree-1.0.7.tgz",
       "integrity": "sha512-RKPAeXnkC59IDGD0Wu5mANy0Q2V28L+fNe65pOCXVdVuTJS3WPKaJlFHer32Rbh9gIo9qMuJXio8ra4+YmIymA=="
     },
+    "node_modules/d3-scale-chromatic": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/d3-scale-chromatic/-/d3-scale-chromatic-3.0.0.tgz",
+      "integrity": "sha512-Lx9thtxAKrO2Pq6OO2Ua474opeziKr279P/TKZsMAhYyNDD3EnCffdbgeSYN5O7m2ByQsxtuP2CSDczNUIZ22g==",
+      "dev": true,
+      "dependencies": {
+        "d3-color": "1 - 3",
+        "d3-interpolate": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/d3-shape": {
       "version": "1.3.7",
       "resolved": "https://registry.npmjs.org/d3-shape/-/d3-shape-1.3.7.tgz",
@@ -3358,6 +3631,15 @@
       "resolved": "https://registry.npmjs.org/defined/-/defined-1.0.0.tgz",
       "integrity": "sha1-yY2bzvdWdBiOEQlpFRGZ45sfppM="
     },
+    "node_modules/delaunator": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/delaunator/-/delaunator-5.0.1.tgz",
+      "integrity": "sha512-8nvh+XBe96aCESrGOqMp/84b13H9cdKbG5P2ejQCh4d4sK9RL4371qou9drQjMhvnPmhWl5hnmqbEE0fXr9Xnw==",
+      "dev": true,
+      "dependencies": {
+        "robust-predicates": "^3.0.2"
+      }
+    },
     "node_modules/delayed-stream": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
@@ -3644,6 +3926,20 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/dunder-proto": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/dunder-proto/-/dunder-proto-1.0.1.tgz",
+      "integrity": "sha512-KIN/nDJBQRcXw0MLVhZE9iQHmG68qAVIBg9CqmUYjmQIhgij9U5MFvrqkUL5FbtyyzZuOeOt0zdeRe4UY7ct+A==",
+      "dev": true,
+      "dependencies": {
+        "call-bind-apply-helpers": "^1.0.1",
+        "es-errors": "^1.3.0",
+        "gopd": "^1.2.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/dup": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/dup/-/dup-1.0.0.tgz",
@@ -3888,13 +4184,10 @@
       }
     },
     "node_modules/es-define-property": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.0.tgz",
-      "integrity": "sha512-jxayLKShrEqqzJ0eumQbVhTYQM27CfT1T35+gCgDFoL82JLsXqTJ76zv6A0YLOgEnLUMvLzsDsGIrl8NFpT2gQ==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/es-define-property/-/es-define-property-1.0.1.tgz",
+      "integrity": "sha512-e3nRfgfUZ4rNGL232gUgX06QNyyez04KdjFrF+LTRoOXmrOgFKDg4BCdsjW8EnT69eqdYGmRpJwiPVYNrCaW3g==",
       "dev": true,
-      "dependencies": {
-        "get-intrinsic": "^1.2.4"
-      },
       "engines": {
         "node": ">= 0.4"
       }
@@ -3940,6 +4233,33 @@
       "integrity": "sha512-9978wrXM50Y4rTMmW5kXIC09ZdXQZqkE4mxhwkd8VbzsGkXGPgV4zWuqQJgCEzYngdo2dYDa0l8xhX4fkSwJSg==",
       "peer": true
     },
+    "node_modules/es-object-atoms": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/es-object-atoms/-/es-object-atoms-1.1.1.tgz",
+      "integrity": "sha512-FGgH2h8zKNim9ljj7dankFPcICIK9Cp5bm+c2gQSYePhpaG5+esrLODihIorn+Pe6FGJzWhXQotPv73jTaldXA==",
+      "dev": true,
+      "dependencies": {
+        "es-errors": "^1.3.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
+    "node_modules/es-set-tostringtag": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/es-set-tostringtag/-/es-set-tostringtag-2.1.0.tgz",
+      "integrity": "sha512-j6vWzfrGVfyXxge+O0x5sh6cvxAog0a/4Rdd2K36zCMV5eJ+/+tOAngRO8cODMNWbVRdVlmGZQL2YS3yR8bIUA==",
+      "dev": true,
+      "dependencies": {
+        "es-errors": "^1.3.0",
+        "get-intrinsic": "^1.2.6",
+        "has-tostringtag": "^1.0.2",
+        "hasown": "^2.0.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/es5-ext": {
       "version": "0.10.63",
       "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.63.tgz",
@@ -4347,6 +4667,12 @@
         "reusify": "^1.0.4"
       }
     },
+    "node_modules/fflate": {
+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.7.4.tgz",
+      "integrity": "sha512-5u2V/CDW15QM1XbbgS+0DfPxVB+jUKhWEKuuFuHncbk3tEEqzmoXL+2KyOFuKGqOnmdIy0/davWF1CkuwtibCw==",
+      "dev": true
+    },
     "node_modules/filing-cabinet": {
       "version": "5.0.2",
       "resolved": "https://registry.npmjs.org/filing-cabinet/-/filing-cabinet-5.0.2.tgz",
@@ -4459,6 +4785,21 @@
         "node": ">= 0.6.x"
       }
     },
+    "node_modules/flatbush": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/flatbush/-/flatbush-3.3.1.tgz",
+      "integrity": "sha512-oKuPbtT+DS2CxH+9Vhbsq8HifmSCuOw+3Cy5zt/vCIrZl5KyengoTHDBLmtpZoBhcwa7/biNjgL1DwdLMJYm1A==",
+      "dev": true,
+      "dependencies": {
+        "flatqueue": "^1.2.1"
+      }
+    },
+    "node_modules/flatqueue": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/flatqueue/-/flatqueue-1.2.1.tgz",
+      "integrity": "sha512-X86TpWS1rGuY7m382HuA9vngLeDuWA9lJvhEG+GfgKMV5onSvx5a71cl7GMbXzhWtlN9dGfqOBrpfqeOtUfGYQ==",
+      "dev": true
+    },
     "node_modules/flatted": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.2.4.tgz",
@@ -4724,11 +5065,33 @@
         "node": ">= 12.13.0"
       }
     },
+    "node_modules/geographiclib": {
+      "version": "1.48.0",
+      "resolved": "https://registry.npmjs.org/geographiclib/-/geographiclib-1.48.0.tgz",
+      "integrity": "sha512-WIpDKKj2Gu+E4jkF3f3fg7OPF6T1/35tQXKc4jLLQrwjNiTZ5KrrYF5Gp0dQ/YbJIoCjb9vs2/abWTRsCEoi2w==",
+      "deprecated": "This package has been split into geographic-geodesic + geographiclib-dms; use one or both of these instead of geographiclib.",
+      "dev": true
+    },
     "node_modules/geojson-vt": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/geojson-vt/-/geojson-vt-3.2.1.tgz",
       "integrity": "sha512-EvGQQi/zPrDA6zr6BnJD/YhwAkBP8nnJ9emh3EnHQKVMfg/MRVtPbMYdgVy/IaEmn4UfagD2a6fafPDL5hbtwg=="
     },
+    "node_modules/geokdbush": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/geokdbush/-/geokdbush-1.1.0.tgz",
+      "integrity": "sha512-pyyrGCMXZwWJaGt1YZIgGQg5ol3JjvEKESTon10HxdfWXlaqh5An8fNJkwOYUE+VkQfCdvYQKPVezTQU9AqWAA==",
+      "dev": true,
+      "dependencies": {
+        "tinyqueue": "^1.2.2"
+      }
+    },
+    "node_modules/geokdbush/node_modules/tinyqueue": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/tinyqueue/-/tinyqueue-1.2.3.tgz",
+      "integrity": "sha512-Qz9RgWuO9l8lT+Y9xvbzhPT2efIUIFd69N7eF7tJ9lnQl0iLj1M7peK7IoUGZL9DJHw9XftqLreccfxcQgYLxA==",
+      "dev": true
+    },
     "node_modules/get-amd-module-type": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/get-amd-module-type/-/get-amd-module-type-6.0.0.tgz",
@@ -4757,16 +5120,21 @@
       "integrity": "sha1-1ue1C8TkyGNXzTnyJkeoS3NgHpM="
     },
     "node_modules/get-intrinsic": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.2.4.tgz",
-      "integrity": "sha512-5uYhsJH8VJBTv7oslg4BznJYhDoRI6waYCxMmCdnTrcCrHA/fCFKoTFz2JKKE0HdDFUF7/oQuhzumXJK7paBRQ==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.3.0.tgz",
+      "integrity": "sha512-9fSjSaos/fRIVIp+xSJlE6lfwhES7LNtKaCBIamHsjr2na1BiABJPo0mOjjz8GJDURarmCPGqaiVg5mfjb98CQ==",
       "dev": true,
       "dependencies": {
+        "call-bind-apply-helpers": "^1.0.2",
+        "es-define-property": "^1.0.1",
         "es-errors": "^1.3.0",
+        "es-object-atoms": "^1.1.1",
         "function-bind": "^1.1.2",
-        "has-proto": "^1.0.1",
-        "has-symbols": "^1.0.3",
-        "hasown": "^2.0.0"
+        "get-proto": "^1.0.1",
+        "gopd": "^1.2.0",
+        "has-symbols": "^1.1.0",
+        "hasown": "^2.0.2",
+        "math-intrinsics": "^1.1.0"
       },
       "engines": {
         "node": ">= 0.4"
@@ -4781,6 +5149,28 @@
       "integrity": "sha512-I0UBV/XOz1XkIJHEUDMZAbzCThU/H8DxmSfmdGcKPnVhu2VfFqr34jr9777IyaTYvxjedWhqVIilEDsCdP5G6g==",
       "dev": true
     },
+    "node_modules/get-port": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/get-port/-/get-port-3.2.0.tgz",
+      "integrity": "sha512-x5UJKlgeUiNT8nyo/AcnwLnZuZNcSjSw0kogRB+Whd1fjjFq4B1hySFxSFWWSn4mIBzg3sRNUDFYc4g5gjPoLg==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/get-proto": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/get-proto/-/get-proto-1.0.1.tgz",
+      "integrity": "sha512-sTSfBjoXBp89JvIKIefqw7U2CCebsc74kiY6awiGogKtoSGbgjYE/G/+l9sF3MWFPNc9IcoOC4ODfKHfxFmp0g==",
+      "dev": true,
+      "dependencies": {
+        "dunder-proto": "^1.0.1",
+        "es-object-atoms": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/get-stream": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-6.0.1.tgz",
@@ -5195,12 +5585,12 @@
       }
     },
     "node_modules/gopd": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.0.1.tgz",
-      "integrity": "sha512-d65bNlIadxvpb/A2abVdlqKqV563juRnZ1Wtk6s1sIR8uNsXR70xqIzVqxVf1eTqDunwT2MkczEeaezCKTZhwA==",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
+      "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg==",
       "dev": true,
-      "dependencies": {
-        "get-intrinsic": "^1.1.3"
+      "engines": {
+        "node": ">= 0.4"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
@@ -5280,22 +5670,10 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/has-proto": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/has-proto/-/has-proto-1.0.1.tgz",
-      "integrity": "sha512-7qE+iP+O+bgF9clE5+UoBFzE65mlBiVj3tKCrlNQ0Ogwm0BjpT/gK4SlLYDMybDh5I3TCTKnPPa0oMG7JDYrhg==",
-      "dev": true,
-      "engines": {
-        "node": ">= 0.4"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/ljharb"
-      }
-    },
     "node_modules/has-symbols": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.3.tgz",
-      "integrity": "sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
+      "integrity": "sha512-1cDNdwJ2Jaohmb3sg4OmKaMBwuC48sYni5HUw2DvsC8LjGTLK9h+eb1X6RyuOHe4hT0ULCW68iomhjUoKUqlPQ==",
       "dev": true,
       "engines": {
         "node": ">= 0.4"
@@ -5363,6 +5741,26 @@
         "node": ">=18"
       }
     },
+    "node_modules/http-basic": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/http-basic/-/http-basic-6.0.0.tgz",
+      "integrity": "sha512-7ScbVjuiReYe8S+OZOpNjoKGXrbhJHIrQQe7eq1TpLTJkxH8MPKvnTUzq/TNLjww1hdFQy8yUIC42wuLhCjYcQ==",
+      "dev": true,
+      "dependencies": {
+        "@types/concat-stream": "^1.6.0",
+        "@types/node": "^7.0.31",
+        "caseless": "~0.12.0",
+        "concat-stream": "^1.4.6",
+        "http-response-object": "^3.0.1",
+        "parse-cache-control": "^1.0.1"
+      }
+    },
+    "node_modules/http-basic/node_modules/@types/node": {
+      "version": "7.10.14",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-7.10.14.tgz",
+      "integrity": "sha512-29GS75BE8asnTno3yB6ubOJOO0FboExEqNJy4bpz0GSmW/8wPTNL4h9h63c6s1uTrOopCmJYe/4yJLh5r92ZUA==",
+      "dev": true
+    },
     "node_modules/http-errors": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.0.tgz",
@@ -5427,6 +5825,21 @@
         "node": ">= 14"
       }
     },
+    "node_modules/http-response-object": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/http-response-object/-/http-response-object-3.0.2.tgz",
+      "integrity": "sha512-bqX0XTF6fnXSQcEJ2Iuyr75yVakyjIDCqroJQ/aHfSdlM743Cwqoi2nDYMzLGWUcuTWGWy8AAvOKXTfiv6q9RA==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "^10.0.3"
+      }
+    },
+    "node_modules/http-response-object/node_modules/@types/node": {
+      "version": "10.17.60",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-10.17.60.tgz",
+      "integrity": "sha512-F0KIgDJfy2nA3zMLmWGKxcH2ZVEtCZXHHdOQs2gSaQ27+lNeEfGxzkIw90aXswATX7AZ33tahPbzy6KAfUreVw==",
+      "dev": true
+    },
     "node_modules/https-proxy-agent": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-5.0.0.tgz",
@@ -5462,6 +5875,12 @@
         "postcss": "^8.1.0"
       }
     },
+    "node_modules/idb-keyval": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/idb-keyval/-/idb-keyval-6.2.1.tgz",
+      "integrity": "sha512-8Sb3veuYCyrZL+VBt9LJfZjLUPWVvqn8tG28VqYNFCo43KHcKuq+b4EiXGeuaLAQWL2YmyDgMp2aSpH9JHsEQg==",
+      "dev": true
+    },
     "node_modules/ieee754": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
@@ -5591,6 +6010,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/internmap": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/internmap/-/internmap-2.0.3.tgz",
+      "integrity": "sha512-5Hh7Y1wQbvY5ooGgPbDaL5iYLAPzMTUrjMulskHLH6wnv/A+1q5rgEaiuqEjB+oxGXIVZs1FF+R/KPN3ZSQYYg==",
+      "dev": true,
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/into-stream": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/into-stream/-/into-stream-6.0.0.tgz",
@@ -6547,6 +6975,18 @@
       "resolved": "https://registry.npmjs.org/kdbush/-/kdbush-3.0.0.tgz",
       "integrity": "sha512-hRkd6/XW4HTsA9vjVpY9tuXJYLSlelnkTmVFu4M9/7MIYQtFcHpbugAU7UbOfjOiVSVYl2fqgBuJ32JUmRo5Ew=="
     },
+    "node_modules/keygrip": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/keygrip/-/keygrip-1.1.0.tgz",
+      "integrity": "sha512-iYSchDJ+liQ8iwbSI2QqsQOvqv58eJCEanyJPJi+Khyu8smkcKSFUCbPwzFcL7YVtZ6eONjqRX/38caJ7QjRAQ==",
+      "dev": true,
+      "dependencies": {
+        "tsscmp": "1.0.6"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/kind-of": {
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.3.tgz",
@@ -6993,6 +7433,74 @@
       "resolved": "https://registry.npmjs.org/tinyqueue/-/tinyqueue-3.0.0.tgz",
       "integrity": "sha512-gRa9gwYU3ECmQYv3lslts5hxuIa90veaEcxDYuu3QGOIAEM2mOZkVHp48ANJuu1CURtRdHKUBY5Lm1tHV+sD4g=="
     },
+    "node_modules/mapshaper": {
+      "version": "0.6.102",
+      "resolved": "https://registry.npmjs.org/mapshaper/-/mapshaper-0.6.102.tgz",
+      "integrity": "sha512-LYflAzywcFskJ4aQVdctuymmOzB15MEjRY2nU+tkEH2hXNtsNSsM/IhOTF+NuoQziKxx7tHZObxnQSpcH5yaAA==",
+      "dev": true,
+      "dependencies": {
+        "@placemarkio/tokml": "^0.3.3",
+        "@tmcw/togeojson": "^5.6.0",
+        "@xmldom/xmldom": "^0.8.6",
+        "adm-zip": "^0.5.9",
+        "commander": "7.0.0",
+        "cookies": "^0.8.0",
+        "d3-color": "3.1.0",
+        "d3-interpolate": "^3.0.1",
+        "d3-scale-chromatic": "3.0.0",
+        "delaunator": "^5.0.0",
+        "fflate": "^0.7.4",
+        "flatbush": "^3.2.1",
+        "geokdbush": "^1.1.0",
+        "iconv-lite": "^0.6.3",
+        "idb-keyval": "^6.2.0",
+        "kdbush": "^3.0.0",
+        "mproj": "0.0.40",
+        "msgpackr": "^1.10.1",
+        "opn": "^5.3.0",
+        "rw": "~1.3.3",
+        "sync-request": "5.0.0",
+        "tinyqueue": "^2.0.3"
+      },
+      "bin": {
+        "mapshaper": "bin/mapshaper",
+        "mapshaper-gui": "bin/mapshaper-gui",
+        "mapshaper-xl": "bin/mapshaper-xl"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
+    "node_modules/mapshaper/node_modules/commander": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-7.0.0.tgz",
+      "integrity": "sha512-ovx/7NkTrnPuIV8sqk/GjUIIM1+iUQeqA3ye2VNpq9sVoiZsooObWlQy+OPWGI17GDaEoybuAGJm6U8yC077BA==",
+      "dev": true,
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/mapshaper/node_modules/iconv-lite": {
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
+      "dev": true,
+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "node_modules/math-intrinsics": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
+      "integrity": "sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/math-log2": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/math-log2/-/math-log2-1.0.1.tgz",
@@ -7306,11 +7814,59 @@
         "to-px": "^1.0.1"
       }
     },
+    "node_modules/mproj": {
+      "version": "0.0.40",
+      "resolved": "https://registry.npmjs.org/mproj/-/mproj-0.0.40.tgz",
+      "integrity": "sha512-Fda92o5LkFUr0Tbz/5QsVhsIgbhnrnQf/eLkYRWGfKspbgvjA0VCk1FF5bT1TgpMHAP7000alBRkV7Q7hesnQg==",
+      "dev": true,
+      "dependencies": {
+        "geographiclib": "1.48.0",
+        "rw": "~1.3.2"
+      },
+      "bin": {
+        "mcs2cs": "bin/mcs2cs",
+        "mproj": "bin/mproj"
+      },
+      "engines": {
+        "node": ">=0.12.0"
+      }
+    },
     "node_modules/ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
       "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
     },
+    "node_modules/msgpackr": {
+      "version": "1.11.2",
+      "resolved": "https://registry.npmjs.org/msgpackr/-/msgpackr-1.11.2.tgz",
+      "integrity": "sha512-F9UngXRlPyWCDEASDpTf6c9uNhGPTqnTeLVt7bN+bU1eajoR/8V9ys2BRaV5C/e5ihE6sJ9uPIKaYt6bFuO32g==",
+      "dev": true,
+      "optionalDependencies": {
+        "msgpackr-extract": "^3.0.2"
+      }
+    },
+    "node_modules/msgpackr-extract": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/msgpackr-extract/-/msgpackr-extract-3.0.3.tgz",
+      "integrity": "sha512-P0efT1C9jIdVRefqjzOQ9Xml57zpOXnIuS+csaB4MdZbTdmGDLo8XhzBG1N7aO11gKDDkJvBLULeFTo46wwreA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "optional": true,
+      "dependencies": {
+        "node-gyp-build-optional-packages": "5.2.2"
+      },
+      "bin": {
+        "download-msgpackr-prebuilds": "bin/download-prebuilds.js"
+      },
+      "optionalDependencies": {
+        "@msgpackr-extract/msgpackr-extract-darwin-arm64": "3.0.3",
+        "@msgpackr-extract/msgpackr-extract-darwin-x64": "3.0.3",
+        "@msgpackr-extract/msgpackr-extract-linux-arm": "3.0.3",
+        "@msgpackr-extract/msgpackr-extract-linux-arm64": "3.0.3",
+        "@msgpackr-extract/msgpackr-extract-linux-x64": "3.0.3",
+        "@msgpackr-extract/msgpackr-extract-win32-x64": "3.0.3"
+      }
+    },
     "node_modules/multipipe": {
       "version": "0.3.1",
       "resolved": "https://registry.npmjs.org/multipipe/-/multipipe-0.3.1.tgz",
@@ -7450,6 +8006,31 @@
         "webidl-conversions": "^3.0.0"
       }
     },
+    "node_modules/node-gyp-build-optional-packages": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/node-gyp-build-optional-packages/-/node-gyp-build-optional-packages-5.2.2.tgz",
+      "integrity": "sha512-s+w+rBWnpTMwSFbaE0UXsRlg7hU4FjekKU4eyAih5T8nJuNZT1nNsskXpxmeqSK9UzkBl6UgRlnKc8hz8IEqOw==",
+      "dev": true,
+      "optional": true,
+      "dependencies": {
+        "detect-libc": "^2.0.1"
+      },
+      "bin": {
+        "node-gyp-build-optional-packages": "bin.js",
+        "node-gyp-build-optional-packages-optional": "optional.js",
+        "node-gyp-build-optional-packages-test": "build-test.js"
+      }
+    },
+    "node_modules/node-gyp-build-optional-packages/node_modules/detect-libc": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.0.3.tgz",
+      "integrity": "sha512-bwy0MGW55bG41VqxxypOsdSdGqLwXPI/focwgTYCFMbdUiBAxLg9CFzG08sz2aqzknwiX7Hkl0bQENjg8iLByw==",
+      "dev": true,
+      "optional": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/node-releases": {
       "version": "2.0.18",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.18.tgz",
@@ -7725,6 +8306,27 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/opn": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/opn/-/opn-5.5.0.tgz",
+      "integrity": "sha512-PqHpggC9bLV0VeWcdKhkpxY+3JTzetLSqTCWL/z/tFIbI6G8JCjondXklT1JinczLz2Xib62sSp0T/gKT4KksA==",
+      "dev": true,
+      "dependencies": {
+        "is-wsl": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/opn/node_modules/is-wsl": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-1.1.0.tgz",
+      "integrity": "sha512-gfygJYZ2gLTDlmbWMI0CE2MwnFzSN/2SZfkMlItC4K/JBlsWVDB0bO6XhqcY13YXE7iMcAJnzTCJjPiTeJJ0Mw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/optionator": {
       "version": "0.8.3",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.3.tgz",
@@ -7905,6 +8507,12 @@
       "resolved": "https://registry.npmjs.org/parenthesis/-/parenthesis-3.1.7.tgz",
       "integrity": "sha512-iMtu+HCbLXVrpf6Ys/4YKhcFxbux3xK4ZVB9r+a2kMSqeeQWQoDNYlXIsOjwlT2ldYXZ3k5PVeBnYn7fbAo/Bg=="
     },
+    "node_modules/parse-cache-control": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/parse-cache-control/-/parse-cache-control-1.0.1.tgz",
+      "integrity": "sha512-60zvsJReQPX5/QP0Kzfd/VrpjScIQ7SHBW6bFCYfEP+fp0Eppr1SHhIO5nd1PjZtvclzSzES9D/p5nFJurwfWg==",
+      "dev": true
+    },
     "node_modules/parse-ms": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/parse-ms/-/parse-ms-2.1.0.tgz",
@@ -8323,6 +8931,15 @@
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
       "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
     },
+    "node_modules/promise": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/promise/-/promise-8.3.0.tgz",
+      "integrity": "sha512-rZPNPKTOYVNEEKFaq1HqTgOwZD+4/YHS5ukLzQCypkj+OkYx7iv0mA91lJlpPPZ8vMau3IIGj5Qlwrx+8iiSmg==",
+      "dev": true,
+      "dependencies": {
+        "asap": "~2.0.6"
+      }
+    },
     "node_modules/protocol-buffers-schema": {
       "version": "3.4.0",
       "resolved": "https://registry.npmjs.org/protocol-buffers-schema/-/protocol-buffers-schema-3.4.0.tgz",
@@ -8866,6 +9483,12 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/robust-predicates": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/robust-predicates/-/robust-predicates-3.0.2.tgz",
+      "integrity": "sha512-IXgzBWvWQwE6PrDI05OvmXUIruQTcoMDzRsOd5CDvHCVLcLHMTSYvOK5Cm46kWqlV3yAbuSpBZdJ5oP5OUoStg==",
+      "dev": true
+    },
     "node_modules/rrweb-cssom": {
       "version": "0.7.1",
       "resolved": "https://registry.npmjs.org/rrweb-cssom/-/rrweb-cssom-0.7.1.tgz",
@@ -9677,6 +10300,26 @@
       "integrity": "sha512-9QNk5KwDF+Bvz+PyObkmSYjI5ksVUYtjW7AU22r2NKcfLJcXp96hkDWU3+XndOsUb+AQ9QhfzfCT2O+CNWT5Tw==",
       "dev": true
     },
+    "node_modules/sync-request": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/sync-request/-/sync-request-5.0.0.tgz",
+      "integrity": "sha512-NKhEA4WacR3mRBIFz1niXrIUTrUVFtP2spzrLMINangebvJ/EFyVv+LMJKvVl6UIrJM4Fburnnj91lRnqb4WkA==",
+      "dev": true,
+      "dependencies": {
+        "http-response-object": "^3.0.1",
+        "sync-rpc": "^1.2.0",
+        "then-request": "^5.0.0"
+      }
+    },
+    "node_modules/sync-rpc": {
+      "version": "1.3.6",
+      "resolved": "https://registry.npmjs.org/sync-rpc/-/sync-rpc-1.3.6.tgz",
+      "integrity": "sha512-J8jTXuZzRlvU7HemDgHi3pGnh/rkoqR/OZSjhTyyZrEkkYQbk7Z33AXp37mkPfPpfdOuj7Ex3H/TJM1z48uPQw==",
+      "dev": true,
+      "dependencies": {
+        "get-port": "^3.1.0"
+      }
+    },
     "node_modules/tapable": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/tapable/-/tapable-2.2.1.tgz",
@@ -9817,6 +10460,47 @@
         "node": ">=10"
       }
     },
+    "node_modules/then-request": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/then-request/-/then-request-5.0.0.tgz",
+      "integrity": "sha512-A3uIVLD33SAvB10PfsxLuQBMV8GVC/6xKBMPOvkJchi6251e5AMJ+Yy+RVKsVsnj0iYNhN2E5SkNSi58H19wsw==",
+      "dev": true,
+      "dependencies": {
+        "@types/concat-stream": "^1.6.0",
+        "@types/form-data": "0.0.33",
+        "@types/node": "^8.0.0",
+        "@types/qs": "^6.2.31",
+        "caseless": "~0.12.0",
+        "concat-stream": "^1.6.0",
+        "form-data": "^2.2.0",
+        "http-basic": "^6.0.0",
+        "http-response-object": "^3.0.1",
+        "promise": "^8.0.0",
+        "qs": "^6.4.0"
+      }
+    },
+    "node_modules/then-request/node_modules/@types/node": {
+      "version": "8.10.66",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.66.tgz",
+      "integrity": "sha512-tktOkFUA4kXx2hhhrB8bIFb5TbwzS4uOhKEmwiD+NoiL0qtP2OQ9mFldbgD4dV1djrlBYP6eBuQZiWjuHUpqFw==",
+      "dev": true
+    },
+    "node_modules/then-request/node_modules/form-data": {
+      "version": "2.5.3",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.5.3.tgz",
+      "integrity": "sha512-XHIrMD0NpDrNM/Ckf7XJiBbLl57KEhT3+i3yY+eWm+cqYZJQTZrKo8Y8AWKnuV5GT4scfuUGt9LzNoIx3dU1nQ==",
+      "dev": true,
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "es-set-tostringtag": "^2.1.0",
+        "mime-types": "^2.1.35",
+        "safe-buffer": "^5.2.1"
+      },
+      "engines": {
+        "node": ">= 0.12"
+      }
+    },
     "node_modules/thenify": {
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
@@ -10071,10 +10755,18 @@
       }
     },
     "node_modules/tslib": {
-      "version": "2.6.3",
-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.6.3.tgz",
-      "integrity": "sha512-xNvxJEOUiWPGhUuUdQgAJPKOOJfGnIyKySOc09XkKsgdUV/3E2zvwZYdejjmRgPCgcym1juLH3226yA7sEFJKQ==",
-      "license": "0BSD"
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="
+    },
+    "node_modules/tsscmp": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/tsscmp/-/tsscmp-1.0.6.tgz",
+      "integrity": "sha512-LxhtAkPDTkVCMQjt2h6eBVY28KCjikZqZfMcC15YBeNjkgUpdCfBu5HoiOTDu86v6smE8yOjyEktJ8hlbANHQA==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.6.x"
+      }
     },
     "node_modules/type": {
       "version": "1.2.0",
diff --git a/package.json b/package.json
index 0b863ad39ef..cf4a4b22b9d 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "use-draftlogs": "node tasks/use_draftlogs.js",
     "empty-draftlogs": "node tasks/empty_draftlogs.js",
     "empty-dist": "node tasks/empty_dist.js",
-    "build": "npm run empty-dist && npm run preprocess && npm run find-strings && npm run bundle && npm run extra-bundles && npm run locales && npm run schema dist && npm run stats",
+    "build": "npm run empty-dist && npm run preprocess && npm run build_topojson && npm run find-strings && npm run bundle && npm run extra-bundles && npm run locales && npm run schema dist && npm run stats",
     "regl-codegen": "node devtools/regl_codegen/server.mjs",
     "cibuild": "npm run empty-dist && npm run preprocess && node tasks/cibundle.mjs",
     "lint": "npx @biomejs/biome lint",
@@ -60,7 +60,10 @@
     "version": "npm run build && git add -A lib dist build src/version.js",
     "postversion": "node -e \"console.log('Version bumped and committed. If ok, run: git push && git push --tags')\"",
     "postpublish": "node tasks/sync_packages.js",
-    "postshrinkwrap": "chttps ."
+    "postshrinkwrap": "chttps .",
+    "get_geodata": "node tasks/topojson/get_geodata.mjs",
+    "process_geodata": "node tasks/topojson/process_geodata.mjs",
+    "build_topojson": "npm run get_geodata && npm run process_geodata"
   },
   "browserify": {
     "transform": [
@@ -85,7 +88,6 @@
     "css-loader": "^7.1.2",
     "d3-force": "^1.2.1",
     "d3-format": "^1.4.5",
-    "d3-geo": "^1.12.1",
     "d3-geo-projection": "^2.9.0",
     "d3-hierarchy": "^1.1.9",
     "d3-interpolate": "^3.0.1",
@@ -124,6 +126,7 @@
   },
   "devDependencies": {
     "@biomejs/biome": "1.8.3",
+    "@turf/simplify": "^7.2.0",
     "amdefine": "^1.0.1",
     "assert": "^2.1.0",
     "browserify-transform-tools": "^1.7.0",
@@ -132,6 +135,7 @@
     "canvas": "^2.11.2",
     "check-node-version": "^4.2.1",
     "chttps": "^1.0.6",
+    "d3-geo": "^3.1.1",
     "deep-equal": "^2.2.3",
     "ecstatic": "^4.1.4",
     "esbuild": "^0.23.1",
@@ -161,6 +165,7 @@
     "karma-viewport": "1.0.2",
     "lodash": "^4.17.21",
     "madge": "^8.0.0",
+    "mapshaper": "^0.6.102",
     "@plotly/mathjax-v2": "npm:mathjax@2.7.5",
     "@plotly/mathjax-v3": "npm:mathjax@^3.2.2",
     "minify-stream": "^2.1.0",
diff --git a/tasks/preprocess.js b/tasks/preprocess.js
index 2436d8add38..e9dc2780bd7 100644
--- a/tasks/preprocess.js
+++ b/tasks/preprocess.js
@@ -11,7 +11,6 @@ var updateVersion = require('./util/update_version');
 // main
 makeBuildCSS();
 exposePartsInLib();
-copyTopojsonFiles();
 updateVersion(constants.pathToPlotlyVersion);
 
 // convert scss to css to js and static css file
@@ -72,13 +71,3 @@ function writeLibFiles(obj) {
         );
     }
 }
-
-// copy topojson files from sane-topojson to dist/
-function copyTopojsonFiles() {
-    fs.copy(
-        constants.pathToTopojsonSrc,
-        constants.pathToTopojsonDist,
-        { clobber: true },
-        common.throwOnError
-    );
-}
diff --git a/tasks/topojson/config.mjs b/tasks/topojson/config.mjs
new file mode 100644
index 00000000000..196cb6f13cb
--- /dev/null
+++ b/tasks/topojson/config.mjs
@@ -0,0 +1,123 @@
+const config = {
+    resolutions: [50, 110],
+    scopes: [
+        {
+            name: 'africa',
+            specs: {
+                filter: 'georeg === "AFR"',
+                bounds: [-30, -50, 60, 50]
+            }
+        },
+        {
+            name: 'antarctica',
+            specs: {
+                filter: 'georeg === "ANT"',
+                bounds: [-180, -90, 180, -50]
+            }
+        },
+        {
+            name: 'asia',
+            specs: {
+                filter: 'georeg === "ASI"',
+                bounds: [15, -90, 180, 85]
+            }
+        },
+        {
+            name: 'europe',
+            specs: {
+                filter: 'georeg === "EUR"',
+                bounds: [-30, 0, 60, 90]
+            }
+        },
+        {
+            name: 'north-america',
+            specs: {
+                filter: 'subreg === "Northern America" || ["Central America", "Caribbean"].includes(intreg)',
+                bounds: [-180, 0, -45, 85]
+            }
+        },
+        {
+            name: 'oceania',
+            specs: {
+                filter: 'georeg === "OCE"',
+                bounds: [-180, -50, 180, 25]
+            }
+        },
+        {
+            name: 'south-america',
+            specs: {
+                filter: 'intreg === "South America"',
+                bounds: [-100, -70, -30, 25]
+            }
+        },
+        {
+            name: 'usa',
+            specs: {
+                filter: 'iso3cd === "USA" && ![4, undefined].includes(stscod)',
+                bounds: [-180, 0, -45, 85]
+            }
+        },
+        {
+            name: 'world',
+            specs: {
+                filter: '',
+                bounds: []
+            }
+        }
+    ],
+    outputDirGeojson: './build/geodata/geojson',
+    outputDirTopojson: './dist/topojson',
+    inputDir: './build/geodata',
+    vectors: {
+        // 'coastlines', 'countries', and 'land' are derived from UN geodata
+        ocean: {
+            source: 'ocean',
+            type: 'physical'
+        },
+        lakes: {
+            source: 'lakes',
+            type: 'physical'
+        },
+        rivers: {
+            source: 'rivers_lake_centerlines',
+            type: 'physical'
+        },
+        subunits: {
+            source: 'admin_1_states_provinces_lakes',
+            type: 'cultural'
+        }
+    },
+    layers: {
+        coastlines: 'land',
+        countries: 'countries',
+        ocean: 'land',
+        lakes: 'lakes',
+        land: 'land',
+        rivers: 'rivers_lake_centerlines',
+        subunits: 'admin_1_states_provinces_lakes'
+    },
+    unFilename: 'un_geodata_simplified',
+    unDownloadUrl: 'https://geoportal.un.org/arcgis/sharing/rest/content/items/d7caaff3ef4b4f7c82689b7c4694ad92/data',
+    filters: {
+        countries: 'stscod !== undefined',
+        land: [
+            '{839C9589-44D9-4BD5-A681-13E10ED03C5E}', // AME
+            '{2EE1B4A5-9C3F-445C-A1AB-399715463785}', // ANT
+            '{3D11547B-94D9-42C9-B849-14B389FE5F7F}', // OCE
+            '{32DB79BE-0D53-46BD-995F-EBE7C30ED6B6}', // AFR
+            '{3F3547E7-C7FB-4347-9D80-575C6485FD2E}', // EUR
+            '{4351AA38-B383-44BF-8341-720DD74872B4}' // ASI
+        ]
+            .map((id) => `globalid === "${id}"`)
+            .join(' || '),
+        subunits: ['AUS', 'BRA', 'CAN', 'USA'].map((id) => `adm0_a3 === "${id}"`).join(' || ')
+    }
+};
+
+export const getNEFilename = ({ resolution, source }) => `ne_${resolution}m_${source}`;
+
+export function getNEDownloadUrl({ resolution, vector: { source, type } }) {
+    return `https://naciscdn.org/naturalearth/${resolution}m/${type}/${getNEFilename({ resolution, source })}.zip`;
+}
+
+export default config;
diff --git a/tasks/topojson/get_geodata.mjs b/tasks/topojson/get_geodata.mjs
new file mode 100644
index 00000000000..3cb8f0fe16d
--- /dev/null
+++ b/tasks/topojson/get_geodata.mjs
@@ -0,0 +1,76 @@
+import { exec } from 'child_process';
+import fs from 'fs';
+import { Readable } from 'stream';
+import { pipeline } from 'stream/promises';
+import config, { getNEDownloadUrl, getNEFilename } from './config.mjs';
+
+const { resolutions, unDownloadUrl, unFilename, vectors } = config;
+
+const tasksPath = './tasks/topojson';
+const outputPath = './build/geodata';
+
+// Download Natural Earth vectors
+for (const vector of Object.values(vectors)) {
+    for (const resolution of resolutions) {
+        const url = getNEDownloadUrl({ resolution, vector });
+        const filename = getNEFilename({ resolution, source: vector.source });
+        const archivePath = `${outputPath}/${filename}.zip`;
+
+        if (fs.existsSync(archivePath)) {
+            console.log(`File ${archivePath} already exists. Skipping download.`);
+        } else {
+            try {
+                console.log(`Downloading data from ${url}`);
+
+                const response = await fetch(url);
+                if (!response.ok || !response.body) throw new Error(`Bad response: ${response.status}`);
+
+                if (!fs.existsSync(outputPath)) fs.mkdirSync(outputPath, { recursive: true });
+                const file = fs.createWriteStream(archivePath);
+                await pipeline(Readable.fromWeb(response.body), file);
+
+                console.log('Decompressing NE shapefile');
+                // Use the shell to handle decompressing
+                if (!fs.existsSync(outputPath)) fs.mkdirSync(outputPath, { recursive: true });
+                exec(`unzip -o ${archivePath} -d ${outputPath}`);
+
+                console.log(`NE Shapefile decompressed to ${outputPath}`);
+            } catch (error) {
+                console.error(`Error when downloading file '${archivePath}': ${error}`);
+                continue;
+            }
+        }
+    }
+}
+
+// Download UN GeoJSON file
+const url = unDownloadUrl;
+const archivePath = `${tasksPath}/${unFilename}.zip`;
+const geojsonPath = `${outputPath}`;
+const geojsonFilePath = `${geojsonPath}/${unFilename}.geojson`;
+
+if (fs.existsSync(archivePath)) {
+    console.log(`File ${archivePath} already exists. Skipping download.`);
+    if (fs.existsSync(geojsonFilePath)) console.log(`File ${geojsonFilePath} already exists. Skipping decompression.`);
+    else exec(`unzip -o ${archivePath} -d ${geojsonPath}`);
+} else {
+    try {
+        console.log(`Downloading data from ${url}`);
+
+        const response = await fetch(url);
+        if (!response.ok || !response.body) throw new Error(`Bad response: ${response.status}`);
+
+        // if (!fs.existsSync(outputPath)) fs.mkdirSync(outputPath, { recursive: true });
+        const file = fs.createWriteStream(geojsonFilePath);
+        await pipeline(Readable.fromWeb(response.body), file);
+        console.log(`UN GeoJSON file saved to ${geojsonFilePath}`);
+
+        console.log('Compressing UN GeoJSON for future use');
+        // Use the shell to handle compression
+        exec(`zip -j ${archivePath} ${geojsonFilePath}`);
+
+        console.log(`UN GeoJSON archive saved to ${archivePath}`);
+    } catch (error) {
+        console.error(`Error when downloading file '${geojsonFilePath}': ${error}`);
+    }
+}
diff --git a/tasks/topojson/process_geodata.mjs b/tasks/topojson/process_geodata.mjs
new file mode 100644
index 00000000000..124cd5298e4
--- /dev/null
+++ b/tasks/topojson/process_geodata.mjs
@@ -0,0 +1,283 @@
+import simplify from '@turf/simplify';
+import { geoIdentity, geoPath } from 'd3-geo';
+import fs from 'fs';
+import mapshaper from 'mapshaper';
+import path from 'path';
+import config, { getNEFilename } from './config.mjs';
+
+const { filters, inputDir, layers, resolutions, scopes, unFilename, vectors } = config;
+
+// Create output directories
+const outputDirGeojson = path.resolve(config.outputDirGeojson);
+if (!fs.existsSync(outputDirGeojson)) fs.mkdirSync(outputDirGeojson, { recursive: true });
+const outputDirTopojson = path.resolve(config.outputDirTopojson);
+if (!fs.existsSync(outputDirTopojson)) fs.mkdirSync(outputDirTopojson, { recursive: true });
+
+async function convertShpToGeo(filename) {
+    const inputFilePath = `${inputDir}/${filename}.shp`;
+    const outputFilePath = `${outputDirGeojson}/${filename}.geojson`;
+    const commands = [inputFilePath, `-proj wgs84`, `-o format=geojson ${outputFilePath}`].join(' ');
+    await mapshaper.runCommands(commands);
+
+    console.log(`GeoJSON saved to ${outputFilePath}`);
+}
+
+function getJsonFile(filename) {
+    try {
+        return JSON.parse(fs.readFileSync(filename, 'utf8'));
+    } catch (err) {
+        console.error(`❌ Failed to load JSON input file '${filename}':`, err.message);
+        process.exit(1);
+    }
+}
+
+async function createCountriesLayer({ bounds, filter, name, resolution, source }) {
+    console.log(`Building ${resolution}m countries layer for '${name}'`);
+    const inputFilePath = `${outputDirGeojson}/${unFilename}_${resolution}m/${source}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/countries.geojson`;
+    const commands = [
+        inputFilePath,
+        bounds.length ? `-clip bbox=${bounds.join(',')}` : '',
+        filter ? `-filter '${filter}'` : '',
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+    addCentroidsToGeojson(outputFilePath);
+    // TODO: Add simplification command if on 110m resolution? Or take care of somewhere else?
+}
+
+function addCentroidsToGeojson(geojsonPath) {
+    const geojson = getJsonFile(geojsonPath);
+    if (!geojson.features) return;
+
+    const features = geojson.features.map((feature) => {
+        const centroid = getCentroid(feature);
+        feature.properties.ct = centroid;
+
+        return feature;
+    });
+
+    fs.writeFileSync(geojsonPath, JSON.stringify({ ...geojson, features }));
+}
+
+async function createLandLayer({ bounds, name, resolution, source }) {
+    // TODO: Figure out way to only include North and Central America via filter, dissolve
+    console.log(`Building ${resolution}m land layer for '${name}'`);
+    const inputFilePath = `${outputDirGeojson}/${unFilename}_${resolution}m/${source}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/land.geojson`;
+    const commands = [
+        inputFilePath,
+        '-dissolve',
+        bounds.length ? `-clip bbox=${bounds.join(',')}` : '',
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+}
+
+async function createCoastlinesLayer({ bounds, name, resolution, source }) {
+    console.log(`Building ${resolution}m coastlines layer for '${name}'`);
+    // TODO: Update source to be a path?
+    const inputFilePath = `${outputDirGeojson}/${unFilename}_${resolution}m/${source}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/coastlines.geojson`;
+    const commands = [
+        inputFilePath,
+        '-dissolve',
+        '-lines',
+        bounds.length ? `-clip bbox=${bounds.join(',')}` : '',
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+}
+
+async function createOceanLayer({ bounds, name, resolution, source }) {
+    console.log(`Building ${resolution}m ocean layer for '${name}'`);
+    const inputFilePath = `./tasks/topojson/world_rectangle.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/ocean.geojson`;
+    const eraseFilePath = `${outputDirGeojson}/${unFilename}_${resolution}m/${source}.geojson`;
+    const commands = [
+        inputFilePath,
+        bounds.length ? `-clip bbox=${bounds.join(',')}` : '',
+        `-erase ${eraseFilePath}`,
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+}
+
+async function createRiversLayer({ name, resolution, source }) {
+    console.log(`Building ${resolution}m rivers layer for '${name}'`);
+    const inputFilePath = `${outputDirGeojson}/${getNEFilename({ resolution, source })}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/rivers.geojson`;
+    const commands = [
+        inputFilePath,
+        `-clip ${outputDirGeojson}/${name}_${resolution}m/countries.geojson`, // Clip to the continent
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+}
+
+async function createLakesLayer({ name, resolution, source }) {
+    console.log(`Building ${resolution}m lakes layer for '${name}'`);
+    const inputFilePath = `${outputDirGeojson}/${getNEFilename({ resolution, source })}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/lakes.geojson`;
+    const commands = [
+        inputFilePath,
+        `-clip ${outputDirGeojson}/${name}_${resolution}m/countries.geojson`, // Clip to the continent
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+}
+
+async function createSubunitsLayer({ name, resolution, source }) {
+    console.log(`Building ${resolution}m subunits layer for '${name}'`);
+    const filter = ['AUS', 'BRA', 'CAN', 'USA'].map((id) => `adm0_a3 === "${id}"`).join(' || ');
+    const inputFilePath = `${outputDirGeojson}/${getNEFilename({ resolution, source })}.geojson`;
+    const outputFilePath = `${outputDirGeojson}/${name}_${resolution}m/subunits.geojson`;
+    const commands = [
+        inputFilePath,
+        `-filter "${filter}"`,
+        `-clip ${outputDirGeojson}/${name}_${resolution}m/countries.geojson`, // Clip to the continent
+        `-o ${outputFilePath}`
+    ].join(' ');
+    await mapshaper.runCommands(commands);
+    addCentroidsToGeojson(outputFilePath);
+}
+
+function pruneProperties(topojson) {
+    for (const layer in topojson.objects) {
+        switch (layer) {
+            case 'countries':
+                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
+                    const { properties } = geometry;
+                    if (properties) {
+                        geometry.id = properties.iso3cd;
+                        geometry.properties = {
+                            ct: properties.ct
+                        };
+                    }
+
+                    return geometry;
+                });
+                break;
+            case 'subunits':
+                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
+                    const { properties } = geometry;
+                    if (properties) {
+                        geometry.id = properties.postal;
+                        geometry.properties = {
+                            ct: properties.ct,
+                            gu: properties.gu_a3
+                        };
+                    }
+
+                    return geometry;
+                });
+
+                break;
+            default:
+                topojson.objects[layer].geometries = topojson.objects[layer].geometries.map((geometry) => {
+                    delete geometry.id;
+                    delete geometry.properties;
+
+                    return geometry;
+                });
+
+                break;
+        }
+    }
+
+    return topojson;
+}
+
+function getCentroid(feature) {
+    const { type } = feature.geometry;
+    const projection = geoIdentity();
+    const path = geoPath(projection);
+
+    if (type === 'MultiPolygon') {
+        let maxArea = -Infinity;
+
+        for (const coordinates of feature.geometry.coordinates) {
+            const polygon = { type: 'Polygon', coordinates };
+            const area = path.area(polygon);
+            if (area > maxArea) {
+                maxArea = area;
+                feature = polygon;
+            }
+        }
+    }
+
+    return path.centroid(feature).map((coord) => +coord.toFixed(2));
+}
+
+async function convertLayersToTopojson({ name, resolution }) {
+    const regionDir = path.join(outputDirGeojson, `${name}_${resolution}m`);
+    if (!fs.existsSync(regionDir)) {
+        console.log(`Couldn't find ${regionDir}`);
+        return;
+    }
+
+    const outputFile = `${outputDirTopojson}/${name}_${resolution}m.json`;
+    // Layer names default to file names
+    const commands = [`${regionDir}/*.geojson combine-files`, `-o format=topojson ${outputFile}`].join(' ');
+    await mapshaper.runCommands(commands);
+
+    // Remove extra information from features
+    const topojson = getJsonFile(outputFile);
+    const prunedTopojson = pruneProperties(topojson);
+    fs.writeFileSync(outputFile, JSON.stringify(prunedTopojson));
+
+    console.log(`Topojson saved to: ${outputFile}`);
+}
+
+// Get polygon features from UN GeoJSON
+const inputFilePath = `${inputDir}/${unFilename}.geojson`;
+const outputFilePath50m = `${outputDirGeojson}/${unFilename}_50m/all_features.geojson`;
+const outputPath110m = `${outputDirGeojson}/${unFilename}_110m`;
+const commandsAllFeatures = [inputFilePath, `-o target=1 ${outputFilePath50m}`].join(' ');
+await mapshaper.runCommands(commandsAllFeatures);
+
+const geojson = getJsonFile(outputFilePath50m);
+const simplifiedGeojson = {
+    ...geojson,
+    features: geojson.features.map((f) => simplify(f, { tolerance: 0.01, highQuality: true }))
+};
+if (!fs.existsSync(outputPath110m)) fs.mkdirSync(outputPath110m, { recursive: true });
+fs.writeFileSync(`${outputPath110m}/all_features.geojson`, JSON.stringify(simplifiedGeojson));
+
+for (const resolution of resolutions) {
+    for (const { source } of Object.values(vectors)) {
+        await convertShpToGeo(getNEFilename({ resolution, source }));
+    }
+
+    // Get countries from all polygon features
+    const inputFilePathCountries = `${outputDirGeojson}/${unFilename}_${resolution}m/all_features.geojson`;
+    const outputFilePathCountries = `${outputDirGeojson}/${unFilename}_${resolution}m/countries.geojson`;
+    const commandsCountries = [
+        inputFilePathCountries,
+        `-filter '${filters.countries}'`,
+        `-o ${outputFilePathCountries}`
+    ].join(' ');
+    await mapshaper.runCommands(commandsCountries);
+
+    // Get land from all polygon features
+    const inputFilePathLand = `${outputDirGeojson}/${unFilename}_${resolution}m/all_features.geojson`;
+    const outputFilePathLand = `${outputDirGeojson}/${unFilename}_${resolution}m/land.geojson`;
+    const commandsLand = [inputFilePathLand, `-filter '${filters.land}'`, `-clean -o ${outputFilePathLand}`].join(' ');
+    await mapshaper.runCommands(commandsLand);
+}
+
+for (const resolution of resolutions) {
+    for (const {
+        name,
+        specs: { bounds, filter }
+    } of scopes) {
+        await createCountriesLayer({ bounds, filter, name, resolution, source: layers.countries });
+        await createLandLayer({ bounds, name, resolution, source: layers.land });
+        await createCoastlinesLayer({ bounds, name, resolution, source: layers.coastlines });
+        await createOceanLayer({ bounds, name, resolution, source: layers.ocean });
+        await createRiversLayer({ bounds, name, resolution, source: layers.rivers });
+        await createLakesLayer({ bounds, name, resolution, source: layers.lakes });
+        await createSubunitsLayer({ bounds, name, resolution, source: layers.subunits });
+        await convertLayersToTopojson({ name, resolution });
+    }
+}
diff --git a/tasks/topojson/world_rectangle.geojson b/tasks/topojson/world_rectangle.geojson
new file mode 100644
index 00000000000..efb6119b4b5
--- /dev/null
+++ b/tasks/topojson/world_rectangle.geojson
@@ -0,0 +1,21 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "Polygon",
+        "coordinates": [
+          [
+            [-180, -90],
+            [180, -90],
+            [180, 90],
+            [-180, 90],
+            [-180,-90]
+          ]
+        ]
+      }
+    }
+  ]
+}
diff --git a/tasks/util/constants.js b/tasks/util/constants.js
index 6442501d9aa..1f6bb0a4856 100644
--- a/tasks/util/constants.js
+++ b/tasks/util/constants.js
@@ -24,20 +24,7 @@ var strictIndex = fs.readFileSync(pathToPlotlyStrict, 'utf-8');
 var allTraces = fs.readdirSync(path.join(pathToSrc, 'traces'))
     .filter(startsWithLowerCase);
 
-var pathToTopojsonSrc;
-try {
-    pathToTopojsonSrc = path.join(path.dirname(require.resolve('sane-topojson')), 'dist/');
-} catch(e) {
-    console.log([
-        '',
-        'WARN: Cannot resolve path to *sane-topojson* package.',
-        '  This can happen when one `npm link sane-topojson`',
-        '  and runs a command in a Docker container.',
-        '  There is nothing to worry, if you see this warning while running',
-        '  `npm run test-image`, `npm run test-export` or `npm run baseline` ;)',
-        ''
-    ].join('\n'));
-}
+var pathToTopojsonSrc = path.join(pathToDist, 'topojson/');
 
 var partialBundleNames = [
     'basic', 'cartesian', 'geo', 'gl3d', 'gl2d', 'mapbox', 'finance', 'strict'
diff --git a/test/jasmine/karma.conf.js b/test/jasmine/karma.conf.js
index f66235d7593..92369e80eb9 100644
--- a/test/jasmine/karma.conf.js
+++ b/test/jasmine/karma.conf.js
@@ -118,7 +118,7 @@ if(isFullSuite) {
 }
 
 var pathToCustomMatchers = path.join(__dirname, 'assets', 'custom_matchers.js');
-var pathToSaneTopojsonDist = path.join(__dirname, '..', '..', 'node_modules', 'sane-topojson', 'dist');
+var pathToTopojsonDist = path.join(__dirname, '..', '..', 'dist', 'topojson');
 var pathToMathJax2 = path.join(__dirname, '..', '..', 'node_modules', '@plotly/mathjax-v2');
 var pathToMathJax3 = path.join(__dirname, '..', '..', 'node_modules', '@plotly/mathjax-v3');
 var pathToVirtualWebgl = path.join(__dirname, '..', '..', 'node_modules', 'virtual-webgl', 'src', 'virtual-webgl.js');
@@ -193,7 +193,7 @@ func.defaultConfig = {
         {pattern: pathToMathJax2 + '/**', included: false, watched: false, served: true},
         {pattern: pathToMathJax3 + '/**', included: false, watched: false, served: true},
         // available to fetch from /base/node_modules/sane-topojson/dist/
-        {pattern: pathToSaneTopojsonDist + '/**', included: false, watched: false, served: true}
+        {pattern: pathToTopojsonDist + '/**', included: false, watched: false, served: true}
     ],
 
     // list of files / pattern to exclude
diff --git a/test/jasmine/tests/geo_test.js b/test/jasmine/tests/geo_test.js
index 16ff8e10138..66ee8a65324 100644
--- a/test/jasmine/tests/geo_test.js
+++ b/test/jasmine/tests/geo_test.js
@@ -23,9 +23,7 @@ var DBLCLICKDELAY = require('../../../src/plot_api/plot_config').dfltConfig.doub
 var HOVERMINTIME = require('../../../src/components/fx').constants.HOVERMINTIME;
 
 // use local topojson files
-Plotly.setPlotConfig({
-    topojsonURL: '/base/node_modules/sane-topojson/dist/'
-});
+Plotly.setPlotConfig({ topojsonURL: '../../../dist/topojson' });
 
 function move(fromX, fromY, toX, toY, delay) {
     return new Promise(function(resolve) {