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Tag: guide

What Is an Orthomosaic? Orthomosaic vs Orthophoto Explained

An orthomosaic is one map-corrected image stitched from many aerial photos. An orthophoto is one corrected photo. Which you have, and where seams go wrong.
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Semantic vs Instance Segmentation on Aerial Imagery

Semantic segmentation labels every pixel with a class: building or not. Instance segmentation draws every building as its own object.
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Greenfield vs Brownfield Sites: Meaning and Differences

A greenfield site has never been built on. A brownfield site has, and may still hold slabs, sheds or contamination. What each costs and how to tell them apart.
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DSM vs DTM vs DEM: What's the Difference and Which to Use

A DSM is the top of everything: roofs, treetops, ground. A DTM is bare ground alone, and DEM usually means the same. Which one to use for flood, slope or 3D.
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What Is a Building Footprint? Meaning & Calculation

A building footprint is the ground area inside a building's outer walls. What counts, how it differs from floor area, and how to calculate it from a plan.
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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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