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Tag: geoai

AI GIS: What It Does Today and Which Tool to Use

AI GIS is software that does GIS work from imagery or a plain request. The five jobs it handles in 2026, the tools for each, and where it still fails.
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What Is Remote Sensing? Sensors, Free Data, QGIS

Remote sensing is measuring the ground from satellites, planes and drones. The sensors, the free data, and a Sentinel-2 workflow in QGIS, step by step.
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Photogrammetry vs LiDAR: Which One for Which Job

Photogrammetry rebuilds a surface from overlapping photos. LiDAR measures it with a laser. One gives colour and a cheap flight, the other sees under the trees.
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Multispectral vs Hyperspectral: Bands, Cost and Free Data

Multispectral records 4 to 13 wide bands, hyperspectral 100 to 300 narrow ones. A table of bands, free satellites, drone sensor cost and data size.
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Orthophoto vs Orthomosaic: The Difference, and 7 Free for QGIS

An orthophoto is one corrected photo; an orthomosaic stitches many. How each is made, why one drew Berlin's TV tower 127 m off, and 7 free national services.
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Semantic vs Instance vs Panoptic Segmentation: The Difference

Semantic segmentation labels every pixel with a class: building or not. Instance segmentation draws every building as its own object.
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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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How to Redesign a Street in QGIS: 5 Methods

Five ways to show a street rebuilt, from hand-drawn vector layers to a generated aerial view. Only one gives back a picture that stays on the map.
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How to Simulate a Flood in QGIS: 5 Methods

From the official hazard map to a generated aerial view of the water. Which method gives a number, which gives a picture, why an elevation model changes both.
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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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