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This library is licensed for personal use or for smal companies generating less than $100,000 annually, for any other cases, please get in touch with us.

Digital Elevation Model library in C#

• Elevation queries (point, polylines, heightmap, GPX)
• 3D export (glTF, STL)
• Imagery (MapBox, OSM, Stamen) : textured 3D models and normal maps
• No setup
• Automatic DEM file download from openTopography.org
• Fast and optimized queries

See sampleshere

Check article on SketchfabAPI Spotlight : Elevation API

• GeoTIFF (JAXA AW3D, and any GeoTIFF)
• HGT (Nasa SRTM)
• netCDF

• glTF
• STL

• Feel free to suggest any idea you'd like to see covered here in the issues :https://github.com/dem-net/DEM.Net/issues.

(Work in progress)SampleApp is a Console App used for test purposes, full of samples. It's pretty messy and lacks documentation but names are self explanatory.

• UseelevationService.DownloadMissingFiles(DEMDataSet.AW3D30, <bbox>) to download and generate metadata for a given dataset.
• Supported datasets : SRTM GL1 and GL3 (HGT files), AWD30 (GeoTIFF)
• Usenew RasterService().GenerateReport(DEMDataSet.AW3D30, <bounding box>) to download only necessary tiles using remote VRT file.
• UserasterService.GenerateFileMetadata(<path to file>, DEMFileFormat.GEOTIFF, false, false) to generate metada for an arbitrary file.
• UseRasterService.GenerateDirectoryMetadata(samplePath);to generate metadata files for your raster tiles.These metadata files will be used as an index when querying Digital Elevation Model data.

• GetLineGeometryElevation
• GetPointElevation

• glTFService can generate triangulated MeshPrimitives from height maps
• Export to .gtlf or .glb

• Rasters fromhttp://www.opentopography.orgDataset used is "ALOS World 3D - 30m" :http://opentopo.sdsc.edu/lidar?format=sd&platform=Satellite%20Data&collector=JAXAFor development and tests, files covering France were used.
• Not used yet but worth mentionning :For sea bed elevation : ETOPO1 Global Relief Modelhttps://www.ngdc.noaa.gov/mgg/global/global.html

• https://github.com/stefangordon/GeoTiffSharp from @stefangordon which provided a good starting point.
• Pedro Sousa :http://build-failed.blogspot.fr/2014/12/processing-geotiff-files-in-net-without.html for good explanations.
• Mathieu Leplatre forhttp://blog.mathieu-leplatre.info/drape-lines-on-a-dem-with-postgis.html
• Andy9FromSpace : HGT file reader inhttps://github.com/Andy9FromSpace/map-elevation

• glTF : glTF2Loader and AssetGenerator :https://github.com/KhronosGroup/glTF
• Tiff support :https://github.com/BitMiracle/libtiff.net
• Serialization :https://github.com/neuecc/ZeroFormatter andhttps://github.com/JamesNK/Newtonsoft.Json
• System.Numerics.Vectors for Vector support
• GPX reader from dlg.krakow.pl