Step-by-step tutorials for GIS professionals. Every Python tutorial ships with the exact scripts we ran, and every map, chart and table on the page is the real output.
GeoPandas · Shapely 2 · rasterio · rioxarray · pystac-client · OSMnx · Folium · pyogrio
Track chlorophyll, turbidity and peat colour proxies in four Peak District reservoirs with free Sentinel-2 imagery: cloud and water masking for small, dark upland lakes, NDCI and NDTI time series from 2019 to 2026, anomaly ranking, maps, tidy CSVs and an honest check against Environment Agency samples.
Map the 2022 Sindh floods with free Sentinel-1 radar from the Microsoft Planetary Computer: convert backscatter to decibels, remove speckle with a Lee filter, pick a water threshold with Otsu's method, and measure the flood extent and how it receded over seven months.
Stream free USGS 3DEP lidar of Washington, D.C., read and inspect a LAZ file with laspy, remove noise, grid the points into a 1 m DTM, DSM and canopy height model, and use the result to measure the Washington Monument to within 44 cm.
237 countries and territories, 849 catalogued sources: national mapping agencies, boundaries, elevation, imagery and open-data portals. Pick a country, or explore them on the interactive globe.