An opinionated workflow for building OSM tiles and styles.

Parsel lets you extract data from XML/HTML documents using XPath or CSS selectors

A library for fast reads of Cloud Optimized Geotiff satellite images, using GeoParquet as COG metadata cache

Node.js lib to transform: lucene query → syntax tree → lucene query

A free and open-source online course for anyone interested in data analysis and data visualization with JavaScript/TypeScript.

LOTUS: A semantic query engine for fast and easy LLM-powered data processing

A lightweight tool for enriching and/or aggregating a CSV with H3 tile IDs.

A street address standardizer compliant with USPS Publication 28. Use as a CLI tool, library, or REST API server.

Gameboy Emulator written in Rust and WebAssembly. 8-bit microprocessor: Sharp LR35902.

PDF Command Line Tools Source

Data files from the Los Angeles Times' Mapping L.A. project

Modern, privacy-friendly, and detailed web analytics that works without cookies or JS.

The Bluesky Social application for Web, iOS, and Android

Software suite for the automated generation of geographically correct or schematic transit maps.

a spreadsheet becomes a streamlit app. trying to figure out when it makes sense to buy a house vs. rent in an expensive city.

WebGL map rendering engine for creative cartography

A faster youtube embed.

PyMuPDF is a high performance Python library for data extraction, analysis, conversion & manipulation of PDF (and other) documents.

Python tool for converting files and office documents to Markdown.

Lighter web automation with Python

A collection of rosters of forms maintained by policing organizations

Learn how to research images and the tools, techniques & tradecraft required.

Limbo is a work-in-progress, in-process OLTP database management system, compatible with SQLite.

Agricultural Maps

A small, simple editor for beginner Python programmers. Written in Python and Qt5.

Questions that I ask myself at the end of each year and each decade.

PDF Command Line Tools binaries for Linux, Mac, Windows

Retry a promise-returning or async function

Benchmarking PDF libraries

CircuitPython - a Python implementation for teaching coding with microcontrollers