handle wkb

pieterprovoost · Jan 6, 2025 · 5fb4e04 · 5fb4e04
1 parent 0d63938
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Showing 3 changed files with 23 additions and 3 deletions.
diff --git a/src/App.js b/src/App.js
@@ -356,7 +356,7 @@ function App() {
 
       <footer className="footer mt-auto pt-5 pb-4 bg-light">
         <Container>
-          <p className="text-muted">This page parses, visualizes, and shares <a href="https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry" rel="noreferrer" className="text-muted" target="_blank">WKT</a> (ISO 13249) as well as <a href="https://opengeospatial.github.io/ogc-geosparql/geosparql11/spec.html#_rdfs_datatype_geowktliteral" target="blank" rel="noreferrer" className="text-muted">geo:wktLiteral</a> strings in a variety of coordinate reference systems. Built with <a href="https://openlayers.org/" target="blank" rel="noreferrer" className="text-muted">OpenLayers</a>, <a href="https://leafletjs.com/" target="blank" rel="noreferrer" className="text-muted">Leaflet</a>, <a href="https://trac.osgeo.org/proj4js" target="blank" rel="noreferrer" className="text-muted">Proj4js</a>, <a href="https://github.com/terraformer-js/terraformer" target="blank" rel="noreferrer" className="text-muted">terraformer</a>, and <a href="https://epsg.io/" target="blank" rel="noreferrer" className="text-muted">epsg.io</a>. Use the drawing tools to create your own geometries. Copy as Well-known Binary (WKB) or Extended Well-known Binary (EWKB). Also supports <a href="https://h3geo.org/" rel="noreferrer" className="text-muted" target="_blank">Uber H3</a>, <a href="https://en.wikipedia.org/wiki/Geohash" rel="noreferrer" className="text-muted" target="_blank">Geohash</a>, <a href="https://learn.microsoft.com/en-us/bingmaps/articles/bing-maps-tile-system" rel="noreferrer" className="text-muted" target="_blank">Quadkey</a>, and WFS BBOX conversion to WKT.</p>
+          <p className="text-muted">This page parses, visualizes, and shares <a href="https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry" rel="noreferrer" className="text-muted" target="_blank">WKT</a> (ISO 13249) as well as <a href="https://opengeospatial.github.io/ogc-geosparql/geosparql11/spec.html#_rdfs_datatype_geowktliteral" target="blank" rel="noreferrer" className="text-muted">geo:wktLiteral</a> strings in a variety of coordinate reference systems. Built with <a href="https://openlayers.org/" target="blank" rel="noreferrer" className="text-muted">OpenLayers</a>, <a href="https://leafletjs.com/" target="blank" rel="noreferrer" className="text-muted">Leaflet</a>, <a href="https://trac.osgeo.org/proj4js" target="blank" rel="noreferrer" className="text-muted">Proj4js</a>, <a href="https://github.com/terraformer-js/terraformer" target="blank" rel="noreferrer" className="text-muted">terraformer</a>, and <a href="https://epsg.io/" target="blank" rel="noreferrer" className="text-muted">epsg.io</a>. Use the drawing tools to create your own geometries. Copy as Well-known Binary (WKB) or Extended Well-known Binary (EWKB). Also supports <a href="https://h3geo.org/" rel="noreferrer" className="text-muted" target="_blank">Uber H3</a>, <a href="https://en.wikipedia.org/wiki/Geohash" rel="noreferrer" className="text-muted" target="_blank">Geohash</a>, <a href="https://learn.microsoft.com/en-us/bingmaps/articles/bing-maps-tile-system" rel="noreferrer" className="text-muted" target="_blank">Quadkey</a>, WKB, and WFS BBOX conversion to WKT.</p>
           <p className="text-muted">Created by <Twitter className="mb-1"/> <a rel="noreferrer" className="text-muted" href="https://twitter.com/PieterPrvst" target="_blank">PieterPrvst</a></p>
         </Container>
       </footer>

diff --git a/src/wkt.js b/src/wkt.js
@@ -120,8 +120,11 @@ function isBbox(input) {
 }
 
 function isGeohash(input) {
-    // TODO: handle WKB as well
-    return input.wkt && input.wkt.match(/^[0-9a-z]+$/);
+  return input.wkt && input.wkt.length <= 10 && input.wkt.match(/^[0-9a-z]+$/);
+}
+
+function isWkb(input) {
+  return input.wkt && input.wkt.match(/^[0-9a-fA-F]+$/);
 }
 
 function h3ToWkt(h3) {
@@ -164,6 +167,12 @@ function bboxToWkt(bbox) {
     "))";
 }
 
+function wkbToWkt(wkb) {
+  const buffer = Buffer.from(wkb, "hex");
+  const geometry = Geometry.parse(buffer);
+  return geometry.toWkt();
+}
+
 function handleOtherFormats(input) {
   if (isH3(input)) {
     input.wkt = h3ToWkt(input.wkt);
@@ -181,6 +190,10 @@ function handleOtherFormats(input) {
     input.wkt = geohashToWkt(input.wkt);
     input.epsg = 4326;
     return("Converted Geohash to WKT");
+  } else if (isWkb(input)) {
+    input.wkt = wkbToWkt(input.wkt);
+    input.epsg = 4326;
+    return("Converted WKB to WKT");
   } else {
     return null;
   }

diff --git a/src/wkt.test.js b/src/wkt.test.js
@@ -87,4 +87,11 @@ describe("handleOtherFormats", () => {
         const message = handleOtherFormats(input);
         expect(message).toEqual("Converted Geohash to WKT");
     });
+    it("handles WKB", async () => {
+        const input = {
+            wkt: "01010000001343723271CB094047E4BB94BA9A4940"
+        };
+        const message = handleOtherFormats(input);
+        expect(message).toEqual("Converted WKB to WKT");
+    });
 });