Use this when the user wants the altitude of places, an elevation profile (cross-section) between two or more points (min, max, total ascent and descent), or the terrain of an area: contour lines (topographic lines) and slope statistics (how steep or flat it is). mode "point": up to 100 points. mode "path": 2 or more points, sampled into at most 500 samples, with a profile chart. mode "area": a bbox or a place with a radius, up to about 10 x 10 km, with interval_m between lines; one area call answers how steep a site is. Data: Copernicus DEM, a 30 m surface model worldwide. Contours download as Shapefile, GeoJSON or KML, which open directly in QGIS. Needs a place, coordinates or an area: to explain what a DEM, a DSM or contour lines are, answer without this tool. Never use the user's current location unless they type it. Give the place as the user names it (place name, address or coordinates): this tool locates it, so find_places is not needed first. Download links build their file when opened; no file is saved. Never pass these links to open_gis_file.