Ключевые слова: altitude, benchmark, cartography, contour, coordinates, dem, elevating, elevation, elevationchelevationprofile, elevationdata, elevationgrid, elevationlayer, elevationmodel, geodetic, geoid, geospatial, gis, gradient, height, illustration, landscape, map, navigation, orienteering, ping, relief, slope, survey, terrain, topoelevation, topography,