SimpleDEMViewer

SimpleDEMViewer is a macOS application for visualizing Digital Elevation Model (DEM) data as relief maps. It reads a wide range of DEM formats, including GTOPO30, SRTM variants, ETOPO series, GeoTiff, netCDF, and several USGS and Japanese GSI formats, allowing users to load their own elevation datasets and view them with color shading, grayscale, or lake rendering.

The program offers multiple map projections such as conical, orthographic, Mercator, azimuthal equidistant, and azimuthal equal‑area, as well as bird’s‑eye, stereographic, panorama, and profile views. Additional tools include contour line generation, mileage measurement, memo annotations with text or media, route and area creation, and the ability to export images in any Image Kit‑supported format or PDF. Integration with Apple Maps and Google Maps provides geographic context, while later versions add features like KML placemark import, DEM value editing, 3D flight visualizations, slope shading, and GeoTiff export.

Targeted at professionals and hobbyists who need to explore and analyze terrain data, SimpleDEMViewer combines basic DEM inspection with a suite of projection and annotation utilities, all within a stable macOS‑only release.