internal void Run(string gpxFile, DEMDataSet dataSet, float Z_FACTOR = 2f, int outputSrid = Reprojection.SRID_PROJECTED_MERCATOR)
{
try
{
float paddingFactor = 2f;
float ModelMaxUnits = 250f;
float GpxLineWidthSTLUnits = 0.1f;
Matrix4x4 stlTransformMatrix = Matrix4x4.CreateRotationX((float)Math.PI / 2f);
string outputDir = Path.GetFullPath(".");
//=======================
/// Line strip from GPX
///
// Get GPX points
var segments = GpxImport.ReadGPX_Segments(gpxFile);
var points = segments.SelectMany(seg => seg);
var bbox = points.GetBoundingBox().ReprojectTo(4326, outputSrid);
bbox = bbox.Pad(bbox.Width * paddingFactor, bbox.Height * paddingFactor, 0)
.ReprojectTo(outputSrid, 4326);
var gpxPointsElevated = _elevationService.GetPointsElevation(points, dataSet);
HeightMap hMap = _elevationService.GetHeightMap(ref bbox, dataSet);
hMap = hMap.ReprojectTo(4326, outputSrid)
.ZScale(Z_FACTOR)
.CenterOnOrigin()
.FitInto(ModelMaxUnits)
.BakeCoordinates();
// generate mesh
ModelRoot model = _sharpGltfService.CreateTerrainMesh(hMap, GenOptions.BoxedBaseElevationMin, stlTransformMatrix);
List <Attribution> attributions = new List <Attribution>();
attributions.Add(dataSet.Attribution);
attributions.Add(new Attribution("Generator", "DEM Net Elevation API", "https://elevationapi.com"));
_stlService.STLExport(model.LogicalMeshes[0].Primitives[0], Path.ChangeExtension(gpxFile, ".stl"), false, attributions);
var bboxPoints = bbox.ReprojectTo(4326, outputSrid).CenterOnOrigin();
gpxPointsElevated = gpxPointsElevated.ReprojectTo(4326, outputSrid)
.ZScale(Z_FACTOR)
.CenterOnOrigin(bbox.ReprojectTo(4326, outputSrid))
.FitInto(bboxPoints, ModelMaxUnits)
.ToList();
var gpxModel = _sharpGltfService.AddLine(null, "GPX", gpxPointsElevated, Vector4.One, GpxLineWidthSTLUnits, stlTransformMatrix);
_stlService.STLExport(gpxModel.LogicalMeshes[0].Primitives[0], Path.ChangeExtension(gpxFile, ".gpx.stl"), false, attributions);
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
}
}
internal void Run()
{
try
{
string _gpxFile = Path.Combine("SampleData", "trail.gpx");
if (!File.Exists(_gpxFile))
{
_logger.LogError($"Cannot run sample: {_gpxFile} is missing !");
}
DEMDataSet _dataSet = DEMDataSet.SRTM_GL1;
// Read GPX points
var segments = GpxImport.ReadGPX_Segments(_gpxFile);
var points = segments.SelectMany(seg => seg);
// Retrieve elevation for each point on DEM
var gpxPointsElevated = _elevationService.GetPointsElevation(points, _dataSet)
.ToList();
_logger.LogInformation($"{gpxPointsElevated.Count} GPX points elevation calculated");
// Get metrics (stats)
var metrics = gpxPointsElevated.ComputeMetrics();
_logger.LogInformation($"GPX points stats: {metrics}");
var gpxPointsSimplified = gpxPointsElevated.Simplify(50);
_logger.LogInformation($"GPX track is reduced with 50m tolerance.");
var metricsWithReducedPoints = gpxPointsSimplified.ComputeMetrics();
_logger.LogInformation($"GPX points stats after reduction: {metricsWithReducedPoints}");
var geoJson = ConvertLineElevationResultToGeoJson(gpxPointsSimplified);
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
}
}
public void Run()
{
try
{
double lat1 = 46.00000000000004;
double lon1 = 10.000000000000007;
double lat2 = 45.212278;
double lont2 = 5.468857;
_logger.LogInformation($"Getting location elevation for each dataset (location lat: {lat1:N2}, lon: {lon1:N2})");
Stopwatch sw = new Stopwatch();
Parallel.ForEach(DEMDataSet.RegisteredNonLocalDatasets, (dataSet, loopState) =>
//foreach (var dataSet in DEMDataSet.RegisteredNonSingleFileDatasets)
{
sw.Restart();
_elevationService.DownloadMissingFiles(dataSet, lat1, lon1);
GeoPoint geoPoint = _elevationService.GetPointElevation(lat1, lon1, dataSet);
_logger.LogInformation($"{dataSet.Name} elevation: {geoPoint.Elevation:N2} (time taken: {sw.Elapsed.TotalMilliseconds:N1}ms)");
}
);
_logger.LogInformation("Multiple point elevation");
sw.Restart();
GeoPoint pt1 = new GeoPoint(lat1, lon1);
GeoPoint pt2 = new GeoPoint(lat2, lont2);
GeoPoint[] points = { pt1, pt2 };
Parallel.ForEach(DEMDataSet.RegisteredNonLocalDatasets, (dataSet, loopState) =>
//foreach (var dataSet in DEMDataSet.RegisteredNonSingleFileDatasets)
{
sw.Restart();
var geoPoints = _elevationService.GetPointsElevation(points, dataSet);
_logger.LogInformation($"{dataSet.Name} elevation: {string.Join(" / ", geoPoints.Select(e => e.Elevation.GetValueOrDefault().ToString("N2")))} (time taken: {sw.Elapsed.TotalMilliseconds:N1}ms)");
}
);
_logger.LogInformation("Line elevation");
sw.Restart();
// Line passing by mont ventoux peak [5.144899, 44.078873], [5.351516, 44.225876]
var elevationLine = GeometryService.ParseGeoPointAsGeometryLine(new GeoPoint(44.078873, 5.144899), new GeoPoint(44.225876, 5.351516));
Parallel.ForEach(DEMDataSet.RegisteredNonLocalDatasets, (dataSet, loopState) =>
//foreach (var dataSet in DEMDataSet.RegisteredNonSingleFileDatasets)
{
_elevationService.DownloadMissingFiles(dataSet, elevationLine.GetBoundingBox());
var geoPoints = _elevationService.GetLineGeometryElevation(elevationLine, dataSet);
var metrics = geoPoints.ComputeMetrics();
_logger.LogInformation($"{dataSet.Name} metrics: {metrics.ToString()}");
var simplified = geoPoints.Simplify(50 /* meters */);
_logger.LogInformation($"{dataSet.Name} after reduction : {simplified.Count} points");
var geoJson = ConvertLineElevationResultToGeoJson(simplified);
}
);
_logger.LogInformation($"Done in {sw.Elapsed.TotalMilliseconds:N1}ms");
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
}
}
public void GenerateModel(string bboxWkt, DEMDataSet litto3DDataset, ImageryProvider imageryProvider, float zFactor = 3f, bool withTexture = true, bool withboat = true, bool withWaterSurface = true, DEMDataSet fallbackDataset = null)
{
try
{
bool centerOnOrigin = true;
int TEXTURE_TILES = 20;
string outputDir = Directory.GetCurrentDirectory();
string modelName = $"{litto3DDataset.ResolutionMeters}m_z{zFactor}_{imageryProvider.Name}-{DateTime.Now:yyyyMMdd-hhmmss}";
_logger.LogInformation($"Getting height map data...");
var bbox = GeometryService.GetBoundingBox(bboxWkt).ReprojectTo(4326, litto3DDataset.SRID);
var heightMap = _elevationService.GetHeightMap(ref bbox, litto3DDataset);
heightMap = heightMap.BakeCoordinates();
var nullCoordsEnumerator = heightMap.Coordinates.Where(c => (c.Elevation ?? litto3DDataset.NoDataValue) == litto3DDataset.NoDataValue);
var interpolator = _elevationService.GetInterpolator(InterpolationMode.Bilinear);
using (IRasterFile raster = _rasterService.OpenFile(@"D:\Data\ELEVATION_DO_NOT_DELETE\GEBCO2020\cote azur\gebco_2020_subset.tif", DEMFileType.GEOTIFF))
using (RasterFileDictionary dic = new RasterFileDictionary())
{
var metadata = raster.ParseMetaData(fallbackDataset.FileFormat);
dic.Add(metadata, raster);
foreach (var pt in nullCoordsEnumerator)
{
var proj = pt.ReprojectTo(litto3DDataset.SRID, fallbackDataset.SRID);
pt.Elevation = _elevationService.GetElevationAtPoint(raster, dic, metadata, proj.Latitude, proj.Longitude, 0, interpolator, NoDataBehavior.UseNoDataDefinedInDem);
}
}
var nullCoords = heightMap.Coordinates.Where(c => (c.Elevation ?? litto3DDataset.NoDataValue) == litto3DDataset.NoDataValue).ToList();
var nullCoordsFallbackProj = nullCoords.ReprojectTo(litto3DDataset.SRID, fallbackDataset.SRID, nullCoords.Count);
var nullCoordsFallbackProj2 = _elevationService.GetPointsElevation(nullCoordsFallbackProj, fallbackDataset, InterpolationMode.Bilinear, NoDataBehavior.UseNoDataDefinedInDem);
ModelGenerationTransform transform = new ModelGenerationTransform(bbox, 3857, centerOnOrigin: centerOnOrigin, zFactor, centerOnZOrigin: false);
ModelGenerationTransform transformFrom4326 = new ModelGenerationTransform(bbox.ReprojectTo(2154, 4326), 3857, centerOnOrigin: centerOnOrigin, zFactor, centerOnZOrigin: false);
_logger.LogInformation($"Processing height map data ({heightMap.Count} coordinates)...");
heightMap = transform.TransformHeightMap(heightMap);
var min = heightMap.Coordinates.Where(g => (g.Elevation ?? 0d) > litto3DDataset.NoDataValue).Min(g => g.Elevation ?? 0d);
heightMap.Coordinates = heightMap.Coordinates.Select(p =>
{
if (p.Elevation.GetValueOrDefault(0) <= litto3DDataset.NoDataValue)
{
p.Elevation = min;
}
return(p);
});
//=======================
// Textures
//
PBRTexture pbrTexture = null;
if (withTexture)
{
var bbox4326 = bbox.ReprojectTo(2154, 4326);
Console.WriteLine("Download image tiles...");
TileRange tiles = _imageryService.DownloadTiles(bbox4326, imageryProvider, TEXTURE_TILES);
string fileName = Path.Combine(outputDir, "Texture.jpg");
Console.WriteLine("Construct texture...");
//TextureInfo texInfo = _imageryService.ConstructTexture(tiles, bbox4326, fileName, TextureImageFormat.image_jpeg);
TextureInfo texInfo;
if (withboat)
{
var trackPoints = GetGeoPointFromGeoJson(BoatCourseGeoJson);
texInfo = _imageryService.ConstructTextureWithGpxTrack(tiles, bbox4326, fileName, TextureImageFormat.image_jpeg, trackPoints, drawGpxVertices: true, color: SixLabors.ImageSharp.PixelFormats.Rgba32.Green, 30);
}
else
{
texInfo = _imageryService.ConstructTexture(tiles, bbox4326, fileName, TextureImageFormat.image_jpeg);
}
//
//=======================
//=======================
// Normal map
Console.WriteLine("Height map...");
//float Z_FACTOR = 0.00002f;
//hMap = hMap.CenterOnOrigin().ZScale(Z_FACTOR);
//var normalMap = _imageryService.GenerateNormalMap(heightMap, outputDir);
pbrTexture = PBRTexture.Create(texInfo, null);// normalMap);
//hMap = hMap.CenterOnOrigin(Z_FACTOR);
//
//=======================
}
// Triangulate height map
// and add base and sides
_logger.LogInformation($"Triangulating height map and generating 3D mesh...");
heightMap = heightMap.BakeCoordinates();
var coords = heightMap.Coordinates.ToList();
var model = _sharpGltfService.CreateTerrainMesh(heightMap, pbrTexture);
if (withWaterSurface)
{
var bottomLeft = coords[heightMap.Width * (heightMap.Height - 1)].AsVector3(); bottomLeft.Z = 0;
var topRight = coords[heightMap.Width - 1].AsVector3(); topRight.Z = 0;
var topLeft = coords[0].AsVector3(); topLeft.Z = 0;
var bottomRight = coords.Last().AsVector3(); bottomRight.Z = 0;
var waterSurface = _meshService.CreateWaterSurface(bottomLeft, topRight, topLeft, bottomRight,
minZ: (float)min,
color: VectorsExtensions.CreateColor(0, 150, 255, 64));
model = _sharpGltfService.AddMesh(model, "Water", waterSurface, doubleSided: true);
}
if (withboat)
{
var boatInitPos = centerOnOrigin ? new GeoPoint(0, 0).AsVector3() : new GeoPoint(43.010625204304304, 6.3711613671060086).ReprojectTo(4326, 3857).AsVector3();
var axis = _meshService.CreateAxis(2, 10, 3, 3).Translate(boatInitPos);
model = _sharpGltfService.AddMesh(model, "Boat", axis, doubleSided: false);
var boatCourse = transformFrom4326.TransformPoints(GetGeoPointFromGeoJson(BoatCourseGeoJson)).ToList(); //ReprojectGeodeticToCartesian().CenterOnOrigin().ToList();
model = _sharpGltfService.AddLine(model, "BoatCourse", boatCourse, VectorsExtensions.CreateColor(255, 0, 0, 128), 4);
}
model.SaveGLB(Path.Combine(Directory.GetCurrentDirectory(), modelName + ".glb"));
_logger.LogInformation($"Model exported as {Path.Combine(Directory.GetCurrentDirectory(), modelName + ".gltf")} and .glb");
//var point = new GeoPoint(43.01142119356318, 6.385200681010872).ReprojectTo(4326, 2154);
//point = _elevationService.GetPointElevation(point, litto3DDataset);
}
catch (Exception e)
{
_logger.LogError(e, e.Message);
}
}
internal void Run(DEMDataSet dataSet, bool trackIn3D = true, bool generateTIN = false, int outputSrid = Reprojection.SRID_PROJECTED_LAMBERT_93)
{
try
{
string _gpxFile = Path.Combine("SampleData", "GPX", "lake-pleasant-camping.gpx");
bool withTexture = true;
float Z_FACTOR = 1.8f;
float Z_TRANSLATE_GPX_TRACK_METERS = 5;
float trailWidthMeters = 5f;
int skipGpxPointsEvery = 1;
ImageryProvider provider = ImageryProvider.MapBoxSatellite; // new TileDebugProvider(null, maxDegreeOfParallelism: 1);// ImageryProvider.MapBoxSatellite;
string outputDir = Path.GetFullPath(".");
//=======================
/// Line strip from GPX
///
// Get GPX points
var segments = GpxImport.ReadGPX_Segments(_gpxFile);
var points = segments.SelectMany(seg => seg);
var bbox = points.GetBoundingBox().Scale(1.1, 1.1).ReprojectTo(4326, dataSet.SRID);
// DEBUG
// Test case : ASTER GDEMv3 : 5.5 43.5 Z=315
// 303 307 308
// 309 *315* 317
// 314 321 324
//points = GenerateDebugTrailPointsGenerateDebugTrailPoints(5.003, 5.006, 43.995, 43.997, 0.0001, 0.001);
//points = GenerateDebugTrailPointsGenerateDebugTrailPoints(5.4990, 5.501, 43.4990, 43.501, 0.0001, 0.001);
//points = GenerateDebugTrailPointsGenerateDebugTrailPoints(5.49, 5.51, 43.49, 43.51, 0.0005, 0.001);
//bbox = points.GetBoundingBox().Scale(1.3,1.3);
IEnumerable <GeoPoint> gpxPointsElevated = _elevationService.GetPointsElevation(points, dataSet);
//
//=======================
//=======================
/// Height map (get dem elevation for bbox)
///
HeightMap hMap = _elevationService.GetHeightMap(ref bbox, dataSet);
// var refPoint = new GeoPoint(43.5, 5.5);
// hMap = hMap.BakeCoordinates();
// var hMapRefPoint = hMap.Coordinates.OrderBy(c => c.DistanceSquaredTo(refPoint)).First();
// var gpxRefPoint = gpxPointsElevated.OrderBy(c => c.DistanceSquaredTo(refPoint)).First();
// hMapRefPoint.Elevation += 60;
// gpxRefPoint.Elevation += 60;
hMap = hMap.ReprojectTo(dataSet.SRID, outputSrid)
//.CenterOnOrigin()
.ZScale(Z_FACTOR)
.BakeCoordinates();
//
//=======================
//=======================
// Textures
//
PBRTexture pbrTexture = null;
if (withTexture)
{
Console.WriteLine("Download image tiles...");
TileRange tiles = _imageryService.DownloadTiles(bbox, provider, 12);
string fileName = Path.Combine(outputDir, "Texture.jpg");
Console.WriteLine("Construct texture...");
//TextureInfo texInfo = _imageryService.ConstructTextureWithGpxTrack(tiles, bbox, fileName, TextureImageFormat.image_jpeg, gpxPointsElevated, false);
TextureInfo texInfo = _imageryService.ConstructTexture(tiles, bbox, fileName, TextureImageFormat.image_jpeg);
//
//=======================
//=======================
// Normal map
Console.WriteLine("Height map...");
//float Z_FACTOR = 0.00002f;
//hMap = hMap.CenterOnOrigin().ZScale(Z_FACTOR);
//var normalMap = _imageryService.GenerateNormalMap(hMap, outputDir);
//pbrTexture = PBRTexture.Create(texInfo, normalMap);
pbrTexture = PBRTexture.Create(texInfo, null);
//hMap = hMap.CenterOnOrigin(Z_FACTOR);
//
//=======================
}
//=======================
// MESH 3D terrain
Console.WriteLine("Height map...");
Console.WriteLine("GenerateTriangleMesh...");
//hMap = _elevationService.GetHeightMap(bbox, _dataSet);
ModelRoot model = null;
if (generateTIN)
{
model = TINGeneration.GenerateTIN(hMap, 10d, _sharpGltfService, pbrTexture, outputSrid);
}
else
{
//hMap = hMap.CenterOnOrigin().ZScale(Z_FACTOR);
// generate mesh with texture
model = _sharpGltfService.CreateTerrainMesh(hMap, pbrTexture);
}
if (trackIn3D)
{
// take 1 point evert nth
gpxPointsElevated = gpxPointsElevated.Where((x, i) => (i + 1) % skipGpxPointsEvery == 0);
gpxPointsElevated = gpxPointsElevated.ZTranslate(Z_TRANSLATE_GPX_TRACK_METERS)
.ReprojectTo(dataSet.SRID, outputSrid)
//.CenterOnOrigin()
//.CenterOnOrigin(hMap.BoundingBox)
.ZScale(Z_FACTOR);
model = _sharpGltfService.AddLine(model, "GPX", gpxPointsElevated, VectorsExtensions.CreateColor(255, 0, 0, 128), trailWidthMeters);
}
// model export
Console.WriteLine("GenerateModel...");
model.SaveGLB(Path.Combine(Directory.GetCurrentDirectory(), $"{GetType().Name} dst{dataSet.Name} TIN{generateTIN} Srid{outputSrid}.glb"));
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
}
}
