A .NET library (netstandard2.0) for decoding a terrain tile (format quantized mesh).
More info about the quantized mesh format: https://github.com/AnalyticalGraphicsInc/quantized-mesh
For more awesome quantized mesh implementations see https://github.com/bertt/awesome-quantized-mesh-tiles
PM> Install-Package quantized-mesh-tile
NETStandard.Library 2.0.3 https://www.nuget.org/packages/NETStandard.Library/
18-12-28: release version 0.3 with BinaryReader instead of FastBinaryReader
18-12-05: release version 0.2 with new .NET project file and conversion to WGS84 (method GetTriangles) removed.
const string terrainTileUrl = @"https://maps.tilehosting.com/data/terrain-quantized-mesh/9/536/391.terrain?key=wYrAjVu6bV6ycoXliAPl";
var client = new HttpClient();
var bytes = client.GetByteArrayAsync(terrainTileUrl).Result;
var stream = new MemoryStream(bytes);
var terrainTile = TerrainTileParser.Parse(stream);
Console.WriteLine("Number of vertices: " + terrainTile.VertexData.vertexCount);
Console.ReadLine();
BenchmarkDotNet=v0.10.1, OS=Microsoft Windows NT 6.2.9200.0
Processor=Intel(R) Core(TM) i7-6820HQ CPU 2.70GHz, ProcessorCount=8
Frequency=10000000 Hz, Resolution=100.0000 ns, Timer=UNKNOWN
[Host] : Clr 4.0.30319.42000, 32bit LegacyJIT-v4.7.3260.0
DefaultJob : Clr 4.0.30319.42000, 32bit LegacyJIT-v4.7.3260.0
Allocated=6.4 kB
Method | Mean | StdDev |
-------------------------- |----------- |---------- |
ParseVectorTileFromStream | 76.5493 us | 1.6733 us |
See samples/qm2geojosn, sample code for converting a quantized mesh tile to GeoJSON.
Result: see https://github.com/bertt/quantized-mesh-tile-cs/blob/master/samples/qm2geojson/triangles.geojson
Sample visualization:
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