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 vineyard in Mendoza, a solar farm in the Mojave, or a mangrove forest in Bangladesh, and the engine returns a global heatmap of every place on Earth that shares the same satellite signature, in about two seconds. Three moves make it work: a coarse grid in memory, on demand refinement at high resolution, and aggressive caching. AlphaEarth The asset that makes the whole thing possible is AlphaEarth Foundations , a geospatial foundation model that Google DeepMind released in 2025. AlphaEarth produces a 64 dimensional embedding for every 10 meter patch of land on Earth, compressing years of satellite imagery, climate data, terrain and seasonality into a single dense representation. Two locations with similar vectors share a similar environmental signature, and finding matches across the planet is just a dot product over those 64 numbers.…