This project is a geographic information system built with TypeScript for visualizing, browsing, and analyzing geospatial data while keeping data local. It includes over 1,000 analysis tools that run in the browser via WebAssembly, covering terrain, hydrology, LiDAR, and remote sensing analysis. It can run in the browser, on desktop, mobile, and in Jupyter Notebook, and also provides planetary basemaps such as the Moon and Mars.