Note : this is still a work in progress. Except first version at end of January 2067 (worst case). Let me know what you need

Digital Elevation Model samples in C#. GeoTiff file parsing and DEM querying. The goal is to provide on the fly DEM querying from GeoJSON or WKT geometries :

• No big RAM cache
• Fast and optimized data retrieval as precise as possible

• All incoming features are listed in the Issues here : https://github.com/xfischer/DEM.Net/issues. Feel free to suggest any idea you'd like to see covered here.
• Provide a simple sample for getting Height Maps (Unity based samples) and vizualising DEM as 3D meshes
• Provide a simple sample to drape a line onto a DEM
• If you have specific needs, let me know (create an issue)

(Work in progress) SampleApp is a Console App used for test purposes.

• Use new GeoTiffService().GenerateReport(DEMDataSet.AW3D30, <bounding box>) to download only necessary tiles using remote VRT file.

• Use GeoTiffService.GenerateDirectoryMetadata(samplePath);to generate metadata files for your GeoTIFF tiles. These metadata files will be used as an index when querying Digital Elevation Model data.

• GeoTiff from http://www.opentopography.org Dataset used is "ALOS World 3D - 30m" : http://opentopo.sdsc.edu/lidar?format=sd&platform=Satellite%20Data&collector=JAXA For development and tests, files covering France were used.
• Not used yet but worth mentionning : For sea bed elevation : ETOPO1 Global Relief Model https://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 for http://blog.mathieu-leplatre.info/drape-lines-on-a-dem-with-postgis.html
• Andy9FromSpace : HGT file reader in https://github.com/Andy9FromSpace/map-elevation