Guides

Plain-language help for working with elevation data, whether you’re new to DEMs or just need to find some data or fix a stubborn file.

All guides

A step-by-step walkthrough with no software to install, including what every control does.

DEM vs DSM vs DTM, how elevation data is made, resolution and accuracy, datums and file formats.

Sources for Canada, the US and the world, plus tested code to download only the area you need.

Every message the viewer can show, what it means, and the QGIS or GDAL fix.