| | |
| | | #region 成员变量 |
| | | public static readonly int MAX = 256 * 256; |
| | | |
| | | public static readonly double MAX_X_OFFSET = 0.002; |
| | | |
| | | public static readonly double MIN_X_OFFSET = -0.00005; |
| | | |
| | | public static readonly double WaterHeightOffset = 1.0; |
| | | |
| | | public static readonly string BaseDir = AppDomain.CurrentDomain.BaseDirectory; |
| | |
| | | /// </summary> |
| | | private static void SetTerrainInfo(Dataset ds, Domain.Layer layer) |
| | | { |
| | | //String srsName = ds.GetSpatialRef().GetName(); |
| | | //layer.terrain.epsg = !string.IsNullOrEmpty(srsName) && srsName.Contains(GdalHelper.CGCS2000) ? "EPSG:4490" : "EPSG:4326"; |
| | | |
| | | Geometry minPoint = GdalHelper.GetMinPoint(ds); |
| | | Geometry maxPoint = GdalHelper.GetMaxPoint(ds); |
| | | layer.extension = new Extension(minPoint.GetX(0), minPoint.GetY(0), maxPoint.GetX(0), maxPoint.GetY(0), double.MaxValue, double.MinValue); |
| | | double minx = GetMinVal(minPoint.GetX(0), 10000000); |
| | | double miny = GetMinVal(minPoint.GetY(0), 10000000); |
| | | double maxx = GetMaxVal(maxPoint.GetX(0) + MAX_X_OFFSET, 10000000); |
| | | double maxy = GetMaxVal(maxPoint.GetY(0), 10000000); |
| | | layer.extension = new Extension(minx, miny, maxx, maxy, double.MaxValue, double.MinValue); |
| | | |
| | | Band band = ds.GetRasterBand(1); |
| | | double[] mm = new double[2]; |
| | |
| | | /// <summary> |
| | | /// 获取最小值 |
| | | /// </summary> |
| | | private static double GetMinVal(double val) |
| | | private static double GetMinVal(double val, double radix = 1000) |
| | | { |
| | | return Convert.ToInt32(Math.Floor(val * 1000)) / 1000.0; |
| | | return Convert.ToInt32(Math.Floor(val * radix)) / radix; |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 获取最大值 |
| | | /// </summary> |
| | | private static double GetMaxVal(double val) |
| | | private static double GetMaxVal(double val, double radix = 1000) |
| | | { |
| | | return Convert.ToInt32(Math.Ceiling(val * 1000)) / 1000.0; |
| | | return Convert.ToInt32(Math.Ceiling(val * radix)) / radix; |
| | | } |
| | | |
| | | /// <summary> |
| | |
| | | //string[] options = Gdal.ParseCommandLine(args); |
| | | string[] options = new string[] |
| | | { |
| | | "-t_srs", |
| | | "EPSG:4326", |
| | | "-ts", |
| | | width.ToString(), |
| | | height.ToString(), |
| | | "-te", |
| | | layer.extension.minx.ToString(), |
| | | layer.extension.miny.ToString(), |
| | | layer.extension.maxx.ToString(), |
| | | layer.extension.maxy.ToString(), |
| | | "-r", |
| | | "bilinear", |
| | | "-of", |
| | | "GTiff" |
| | | "-t_srs", "EPSG:4326", // layer.terrain.epsg, |
| | | "-ts", width.ToString(), height.ToString(), |
| | | "-te", layer.extension.minx.ToString(), layer.extension.miny.ToString(), layer.extension.maxx.ToString(), layer.extension.maxy.ToString(), |
| | | "-te_srs", "EPSG:4326", // layer.terrain.epsg, |
| | | "-r", "bilinear", |
| | | "-of", "GTiff" |
| | | }; |
| | | GDALWarpAppOptions warpAppOptions = new GDALWarpAppOptions(options); |
| | | |
| | |
| | | Graphics graphic = Graphics.FromImage(image); |
| | | graphic.Clear(Color.Transparent); // 填充透明色 |
| | | |
| | | double perHeight = (layer.terrain.maxHeight - layer.terrain.minHeight) * 100 / 65536; |
| | | //double perHeight = (layer.terrain.maxHeight - layer.terrain.minHeight) * 100 / 65536; |
| | | double differ = layer.terrain.maxHeight - layer.terrain.minHeight; |
| | | for (int x = 0; x < width; x++) |
| | | { |
| | | for (int y = 0; y < height; y++) |
| | |
| | | int offset = x + y * width; |
| | | if (float.IsNaN(buffer[offset]) || buffer[offset] < -999) continue; |
| | | |
| | | //int val = Convert.ToInt32(buffer[offset] * 100); |
| | | int val = Convert.ToInt32((buffer[offset] - layer.terrain.minHeight) * 100 / perHeight); |
| | | int r = val / 65536; |
| | | int g = (val - r * 65536) / 256; |
| | | //int val = Convert.ToInt32((buffer[offset] - layer.terrain.minHeight) * 100 / perHeight); |
| | | int val = Convert.ToInt32((buffer[offset] - layer.terrain.minHeight) / differ * 65536); |
| | | int r = 0; |
| | | int g = val / 256; |
| | | int b = val % 256; |
| | | |
| | | Color color = Color.FromArgb(127, r, g, b); |
| | |
| | | finally |
| | | { |
| | | if (null != ds) ds.Dispose(); |
| | | if (File.Exists(tif)) File.Delete(tif); |
| | | //if (File.Exists(tif)) File.Delete(tif); |
| | | } |
| | | } |
| | | #endregion |
| | |
| | | ds = Gdal.Open(tif, Access.GA_ReadOnly); |
| | | if (null == ds || 0 == ds.RasterCount) return; |
| | | |
| | | OSGeo.GDAL.Band band = ds.GetRasterBand(1); |
| | | Band band = ds.GetRasterBand(1); |
| | | float[] buffer = new float[width * height]; |
| | | band.ReadRaster(0, 0, width, height, buffer, width, height, 0, 0); |
| | | |
| | |
| | | finally |
| | | { |
| | | if (null != ds) ds.Dispose(); |
| | | if (File.Exists(tif)) File.Delete(tif); |
| | | //if (File.Exists(tif)) File.Delete(tif); |
| | | } |
| | | } |
| | | #endregion |
| | |
| | | vxDs.GetRasterBand(1).ReadRaster(0, 0, width, height, vxBuffer, width, height, 0, 0); |
| | | vyDs.GetRasterBand(1).ReadRaster(0, 0, width, height, vyBuffer, width, height, 0, 0); |
| | | |
| | | double[] vxMm = new double[2]; |
| | | vxDs.GetRasterBand(1).ComputeRasterMinMax(vxMm, 0); |
| | | double[] vyMm = new double[2]; |
| | | vyDs.GetRasterBand(1).ComputeRasterMinMax(vyMm, 0); |
| | | double min = vxMm[0] < vyMm[0] ? vxMm[0] : vyMm[0]; |
| | | double max = vxMm[1] > vyMm[1] ? vxMm[1] : vyMm[1]; |
| | | double perHeight = (max - min) / 255; |
| | | |
| | | CreateFlowPng(vxBuffer, vyBuffer, min, perHeight, png, width, height); |
| | | CreateFlowPng(vxBuffer, vyBuffer, png, width, height); |
| | | } |
| | | finally |
| | | { |
| | | if (null != vxDs) vxDs.Dispose(); |
| | | if (null != vyDs) vyDs.Dispose(); |
| | | if (File.Exists(vxTif)) File.Delete(vxTif); |
| | | if (File.Exists(vyTif)) File.Delete(vyTif); |
| | | //if (File.Exists(vxTif)) File.Delete(vxTif); |
| | | //if (File.Exists(vyTif)) File.Delete(vyTif); |
| | | } |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 创建流速流向PNG |
| | | /// </summary> |
| | | private static void CreateFlowPng(float[] vxBuffer, float[] vyBuffer, double minHeight, double perHeight, string png, int width, int height) |
| | | private static void CreateFlowPng(float[] vxBuffer, float[] vyBuffer, string png, int width, int height) |
| | | { |
| | | Bitmap image = new Bitmap(width, height); |
| | | Graphics graphic = Graphics.FromImage(image); |
| | |
| | | int offset = x + y * width; |
| | | float fx = GetFloatValue(vxBuffer[offset]); |
| | | float fy = GetFloatValue(vyBuffer[offset]); |
| | | double rv = GetRVal(fx, fy); |
| | | double dv = GetXyValue(fx, fy, rv); |
| | | if (float.IsNaN(fx) && float.IsNaN(fy) || (fx == 0 && fy == 0)) continue; |
| | | |
| | | int r= Convert.ToInt32(double.IsNaN(dv) || dv == 0 ? 0 : (dv * 0.5 + 0.5) * 255); |
| | | int g = float.IsNaN(fx) ? 0 : Convert.ToInt32((fx - minHeight) / perHeight); |
| | | int b = float.IsNaN(fy) ? 0 : Convert.ToInt32((fy - minHeight) / perHeight); |
| | | if (r < 0 || r > 255) r = 255; |
| | | if (g < 0 || g > 255) g = 255; |
| | | if (b < 0 || b > 255) b = 255; |
| | | fx = float.IsNaN(fx) ? 0 : fx; |
| | | fy = float.IsNaN(fy) ? 0 : fy; |
| | | double dr = Math.Sqrt(Math.Pow(fx, 2) + Math.Pow(fy, 2)); |
| | | |
| | | Color color = Color.FromArgb(127, r, g, b); |
| | | int r = Convert.ToInt32(dr / 4 * 255); |
| | | int g = Convert.ToInt32((fx / dr * 0.5 + 0.5) * 255); |
| | | int b = Convert.ToInt32((fy / dr * 0.5 + 0.5) * 255); |
| | | |
| | | Color color = Color.FromArgb(127, GetSafeValue(r), GetSafeValue(g), GetSafeValue(b)); |
| | | image.SetPixel(x, y, color); |
| | | } |
| | | } |
| | |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 获取R值 |
| | | /// 获取安全值 |
| | | /// </summary> |
| | | private static double GetRVal(float fx, float fy) |
| | | private static int GetSafeValue(int val) |
| | | { |
| | | if (float.IsNaN(fx) && float.IsNaN(fy)) return double.NaN; |
| | | if (val < 0) return 0; |
| | | if (val > 255) return 255; |
| | | |
| | | if (float.IsNaN(fx)) return Math.Abs(fy); |
| | | |
| | | if (float.IsNaN(fy)) return Math.Abs(fx); |
| | | |
| | | return Math.Sqrt(Math.Pow(fx, 2) + Math.Pow(fy, 2)); |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 获取XY值 |
| | | /// </summary> |
| | | private static double GetXyValue(float fx, float fy, double rv) |
| | | { |
| | | if ((float.IsNaN(fx) && float.IsNaN(fy)) || double.IsNaN(rv)) return 0; |
| | | |
| | | if (float.IsNaN(fx)) |
| | | { |
| | | return fy / rv; |
| | | } |
| | | if (float.IsNaN(fy)) |
| | | { |
| | | return fx / rv; |
| | | } |
| | | |
| | | double dv = fx / rv + fy / rv; |
| | | |
| | | return dv < 0 ? -Math.Sqrt(-dv) : Math.Sqrt(dv); |
| | | return val; |
| | | } |
| | | #endregion |
| | | |
| | |
| | | |
| | | #region 暂时不用 |
| | | /// <summary> |
| | | /// 重采样 * |
| | | /// 设置地形信息 |
| | | /// </summary> |
| | | private static void SetTerrainInfo(Dataset ds, string outPath, Domain.Layer layer) |
| | | { |
| | | string tempPath = Path.Combine(outPath, "temp"); |
| | | if (!Directory.Exists(tempPath)) Directory.CreateDirectory(tempPath); |
| | | |
| | | string tif = Path.Combine(tempPath, Path.GetFileNameWithoutExtension(ds.GetDescription()) + ".tif"); |
| | | Resample(ds, tif); |
| | | if (!File.Exists(tif)) throw new Exception("高程文件重投影失败!"); |
| | | |
| | | Dataset tifDS = null; |
| | | try |
| | | { |
| | | tifDS = Gdal.Open(tif, Access.GA_ReadOnly); |
| | | if (null == tifDS || 0 == tifDS.RasterCount || null == tifDS.GetSpatialRef()) return; |
| | | |
| | | double[] transform = new double[6]; |
| | | tifDS.GetGeoTransform(transform); |
| | | double minx = transform[0]; |
| | | double miny = transform[3] - tifDS.RasterYSize * transform[1]; |
| | | double maxx = transform[0] + (tifDS.RasterYSize * transform[1]); |
| | | double maxy = transform[3]; |
| | | |
| | | layer.extension = new Extension(minx, miny, maxx, maxy, double.MaxValue, double.MinValue); |
| | | |
| | | Band band = tifDS.GetRasterBand(1); |
| | | double[] mm = new double[2]; |
| | | band.ComputeRasterMinMax(mm, 0); |
| | | layer.terrain.SetHeight(GetMinVal(mm[0]), GetMaxVal(mm[1])); |
| | | } |
| | | finally |
| | | { |
| | | if (null != tifDS) tifDS.Dispose(); |
| | | } |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 重采样 |
| | | /// </summary> |
| | | private static void Resample(Dataset ds, string dest) |
| | | { |
| | | string[] options = new string[] { "-t_srs", "EPSG:4326", "-r", "bilinear", "-of", "GTiff" }; |
| | | GDALWarpAppOptions warpAppOptions = new GDALWarpAppOptions(options); |
| | | |
| | | Dataset destDs = Gdal.Warp(dest, new Dataset[] { ds }, warpAppOptions, null, null); |
| | | destDs.Dispose(); |
| | | } |
| | | |
| | | /// <summary> |
| | | /// 重采样 |
| | | /// </summary> |
| | | private static void Resample(string source, string dest, int width, int height) |
| | | { |