Articles on Mapping
Drones in agriculture: vigour maps and NDVI explained
Drones in agriculture: what an NDVI vigour map shows, what it cannot tell you and how to order a multispectral flight that helps with irrigation decisions.
Earthworks volumes: how to compare surveys over time
Earthworks volumes from drone surveys: which surfaces to compare, what must match between surveys and which errors distort the volume before you certify.
Solar farm topographic survey: what data to ask for
Topographic survey for solar farms and large sites: which deliverables to request, what resolution each phase needs and how to avoid flying twice.
Survey quality control: checking a topographic delivery
Survey quality control: what a delivery should include (report, reference system, RMSE) and how to check it yourself with a few points of your own.
Flood zone maps in Spain: checking them and the DTM's role
Flood zones in Spain: what they are, how to check the official SNCZI viewer and why the quality of the DTM decides the outcome of a flood risk study.
Contour lines: what they are and how they are made
Contour lines explained: what they are, how to choose the contour interval and how a drone DTM becomes a contour map ready for design work.
DTM vs DSM: differences and when to use each
DTM vs DSM explained with examples: what a digital terrain model is, what a digital surface model is, where DEM fits in and which one each project needs.
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