Same Zone, Same Projection, 427 Metres Apart
I was writing a blog post about the architecture of a system I built when I found a bug in it. This is that bug, and the much more interesting thing…
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ARGOS v0.0.1 is live: a digital twin of Kefalonia
Three weeks ago I started building a map that argues back. Today it is public. 🗺️ argos-geo.org/map What you can do: Click any building, road, beach…
# Build Log #1: Processing my first Sentinel-2 pass in 48 hours
48 hours and moderate sleep later, ARGOS just processed its first Sentinel-2 pass over Kefalonia. This is what that looks like. What I was trying to…
Why AI-Generated GIS Code Can Run Successfully and Still Be Wrong
Geospatial code has an unusual failure mode: it can execute without errors, produce a clean-looking result, and still be methodologically wrong . Th…
[System Design] H3 Geospatial Indexing: How Uber Finds Nearby Drivers with Hexagonal Spatial Index
The Problem: Finding a Needle in a Haystack Answer-first: Uber and Grab find the nearest available driver in under 100ms by dividing the Earth's sur…
A search engine for places that look alike
I open sourced Similar Earth , a tool that lets you drop a pin anywhere on the planet and find every other place that looks like it. Drop a pin on a…