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Tag: guide

DSM vs DTM vs DEM: The Difference, Measured, and Free Downloads

A DSM is the top of everything, a DTM bare ground, a DEM either. On one town tile the DSM made 41% of the ground steeper than 30°, the DTM 7%. 8 free sources.
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Building Footprint Meaning, Measured on 8,511 Houses, Free Data

The ground area inside a building's outer walls: what counts, how to calculate it, 8,511 houses measured, and why Microsoft's footprints run 19 to 31% too big.
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What Is GeoAI? Definition, Examples, Uses in QGIS

GeoAI is machine learning run on geographic data. The five things it extracts today, what it costs in hardware and time, and how to run it in QGIS.
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