private void MapRasterToTriangulation()
{
Console.WriteLine("Mapping elevation raster pixels to triangulation...\n");
List<River> rivers = model.Rivers.Values.ToList();
List<WaterSurfacePolygon> waterSurfacePolygons = new List<WaterSurfacePolygon>();
//Create triangulation for each river
for (int k = 0; k < rivers.Count; k++)
{
River river = rivers[k];
foreach (Reach reach in river.Reaches.Values)
{
reach.CreateGISFeatures();
reach.CreateTriangulationForWaterSurface();
foreach (WaterSurfacePolygon polygon in reach.WaterSurfaces)
{
waterSurfacePolygons.Add(polygon);
}
}
}
float[] mapping = new float[xSize * ySize];
rasterWaterSurfaceMapping = new int[xSize][];
rasterTriangleMapping = new int[xSize][];
for (int i = 0; i < xSize; i++)
{
rasterWaterSurfaceMapping[i] = new int[ySize];
rasterTriangleMapping[i] = new int[ySize];
for (int j = 0; j < ySize; j++)
{
rasterWaterSurfaceMapping[i][j] = -1;
rasterTriangleMapping[i][j] = -1;
mapping[j * xSize + i] = noData;
}
}
int count = 0;
int foundCount = 0;
int stepSize = (int)Math.Floor(xSize * ySize * 0.01);
List<List<Coordinate>> coordinates = new List<List<Coordinate>>();
//Parallel.For(0, waterSurfacePolygons.Count, k =>
for (int k = 0; k < waterSurfacePolygons.Count; k++)
{
WaterSurfacePolygon watersurfacePolygon = waterSurfacePolygons[k];
Interlocked.Increment(ref count);
double progress = count * 100.0 / (waterSurfacePolygons.Count * 1.0);
lock (Console.Out)
{
Console.SetCursorPosition(0, Console.CursorTop);
Console.Write("Progress => " + progress.ToString("###") + " %");
}
lock (watersurfacePolygon)
{
Point pltc = getCoordIndexes(watersurfacePolygon.MinX, watersurfacePolygon.MaxY);
Point prbc = getCoordIndexes(watersurfacePolygon.MaxX, watersurfacePolygon.MinY);
List<Coordinate> coordinate = new List<Coordinate>();
Point ptt1 = getCoords((int)pltc.X, (int)pltc.Y);
Point ptt2 = getCoords((int)prbc.X, (int)prbc.Y);
coordinate.Add(new Coordinate(ptt1.X, ptt1.Y));
coordinate.Add(new Coordinate(ptt1.X, ptt2.Y));
coordinate.Add(new Coordinate(ptt2.X, ptt1.Y));
coordinate.Add(new Coordinate(ptt2.X, ptt2.Y));
for (int i = (int)pltc.X; i < prbc.X; i++)
{
for (int j = (int)pltc.Y; j < prbc.Y; j++)
{
Point p2 = getCoords(i, j);
lock (watersurfacePolygon)
{
if (watersurfacePolygon.Contains(p2.X, p2.Y))
{
int m = watersurfacePolygon.FindTriangleThatContains(p2.X, p2.Y);
if (m > -1)
{
rasterWaterSurfaceMapping[i][j] = k;
mapping[j * xSize + i] = k;
rasterTriangleMapping[i][j] = m;
}
}
}
}
}
coordinates.Add(coordinate);
}
}
using(IFeatureSet set = new FeatureSet(FeatureType.MultiPoint))
{
foreach(var p in coordinates)
set.AddFeature(new MultiPoint(p));
set.SaveAs(localWorkspace + "\\" + name + "_point.shp", true);
}
//);
OSGeo.GDAL.Driver driver = Gdal.GetDriverByName(rasterDriver);
Dataset newRaster = driver.Create(localWorkspace + "\\" + name + "_mapping.tif", xSize, ySize, 1, dataType, new string[] { "TFW=YES", "COMPRESS=LZW" });
newRaster.GetRasterBand(1).SetNoDataValue(noData);
newRaster.SetGeoTransform(geoTransformation);
newRaster.SetProjection(projection);
Band newRasterBand = newRaster.GetRasterBand(1);
newRasterBand.WriteRaster(0, 0, xSize, ySize, mapping, xSize, ySize, 0, 0);
double min, max, mean, stdev;
newRasterBand.GetStatistics(0, 1, out min, out max, out mean, out stdev);
newRasterBand.FlushCache();
newRaster.FlushCache();
newRaster.Dispose();
newRaster = null;
driver.Dispose();
driver = null;
using (IFeatureSet fs = new FeatureSet(DotSpatial.Topology.FeatureType.Polygon))
{
fs.DataTable.Columns.AddRange(new DataColumn[]
{
new DataColumn("Identifier" , typeof(int)),
});
int tcount = 0;
for (int k = 0; k < waterSurfacePolygons.Count; k++)
{
WaterSurfacePolygon surface = waterSurfacePolygons[k];
foreach (TriangleNet.Data.Triangle pgon in surface.Triangles)
{
TriangleNet.Data.Triangle ts = pgon;
List<Coordinate> vertices = new List<Coordinate>();
Point p0 = surface.Points[ts.P0];
Point p1 = surface.Points[ts.P1];
Point p2 = surface.Points[ts.P2];
Coordinate c1 = new Coordinate(p0.X, p0.Y, p0.Z);
Coordinate c2 = new Coordinate(p1.X, p1.Y, p1.Z);
Coordinate c3 = new Coordinate(p2.X, p2.Y, p2.Z);
vertices.Add(c1);
vertices.Add(c2);
vertices.Add(c3);
Polygon polygon = new Polygon(vertices);
IFeature fset = fs.AddFeature(polygon);
fset.DataRow.BeginEdit();
fset.DataRow["Identifier"] = k;
fset.DataRow.EndEdit();
tcount++;
}
}
fs.SaveAs(localWorkspace + "\\" + name + "_polygon.shp", true);
fs.Close();
fs.Dispose();
}
double temp = 100;
Console.SetCursorPosition(0, Console.CursorTop);
Console.WriteLine("Progress => " + temp.ToString("###") + " % \n");
temp = foundCount * 100.0 / (xSize * ySize * 1.0);
Console.WriteLine(temp.ToString("###.0") + " % of pixels were found in triangulation \n");
Console.WriteLine("Finished mapping elevation raster pixels to triangulation !\n");
}