修改高程和水面的计算方法

13693261870

2024-07-22 1f22a86346c18ccb29a4a712c4acb05c013b33d4

 SimuTools/Tools/Handle.cs

@@ -36,8 +36,8 @@
            if (!Directory.Exists(temp)) Directory.CreateDirectory(temp);

            CopeTerrain(terrainFile, outPath, layer);
            //CopeWater(waterPath, outPath, layer);
            CopeFlow(flowPath, outPath, layer);
            CopeWater(waterPath, outPath, layer);
            //CopeFlow(flowPath, outPath, layer);
            CopeLayerJson(outPath, layer);

            if (Directory.Exists(temp)) Directory.Delete(temp, true);
@@ -56,7 +56,7 @@
                if (null == ds || 0 == ds.RasterCount || null == ds.GetSpatialRef()) return;

                SetTerrainInfo(ds, layer);
                //CreateTerrainPng(ds, layer, outPath);
                CreateTerrainPng(ds, layer, outPath);
            }
            finally
            {
@@ -92,7 +92,8 @@
            foreach (int[] sizes in layer.terrain.size)
            {
                string tif = Path.Combine(tempPath, DateTime.Now.Ticks.ToString() + ".tif");
                Resample(ds.GetDescription(), tif, sizes[0], sizes[1]);
                //Resample(ds.GetDescription(), tif, sizes[0], sizes[1]);
                Resample(ds, tif, sizes[0], sizes[1]);
                if (!File.Exists(tif))
                {
                    continue;
@@ -105,6 +106,32 @@

        /// <summary>
        /// 重采样
        /// </summary>
        private static void Resample(Dataset ds, string dest, int width, int height)
        {
            // https://blog.51cto.com/u_16099346/6691820
            //string args = string.Format("-t_srs {0} -ts {1} {2} -r {3} -of {4}", "EPSG:4326", width, height, "bilinear", "GTiff");
            //string[] options = Gdal.ParseCommandLine(args);
            string[] options = new string[]
            {
                "-t_srs",
                "EPSG:4326",
                "-ts",
                width.ToString(),
                height.ToString(),
                "-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)
        {
@@ -173,22 +200,16 @@
                Graphics graphic = Graphics.FromImage(image);
                graphic.Clear(Color.Transparent); // 填充透明色

                //double perHeight = (layer.extension.maxHeight - layer.extension.minHeight) * 100 / 65536;
                //int val = Convert.ToInt32(buffer[x * y]* 100); //Convert.ToInt32((buffer[x * y] - layer.extension.minHeight) * 100);
                //int val = Convert.ToInt32((buffer[x * y] - layer.extension.minHeight) * 100 / perHeight);

                double perHeight = (layer.extension.maxHeight - layer.extension.minHeight) * 100 / 65536;
                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)
                        {
                            //image.SetPixel(x, y, Color.Transparent);
                            continue;
                        }
                        if (float.IsNaN(buffer[offset]) || buffer[offset] < -999) continue;

                        int val = Convert.ToInt32(buffer[offset] * 100);
                        //int val = Convert.ToInt32(buffer[offset] * 100);
                        int val = Convert.ToInt32((buffer[offset] - layer.extension.minHeight) * 100 / perHeight);
                        int r = val / 65536;
                        int g = (val - r * 65536) / 256;
                        int b = val % 256;
@@ -197,7 +218,6 @@
                        image.SetPixel(x, y, color);
                    }
                }

                image.Save(png, System.Drawing.Imaging.ImageFormat.Png);
            }
            finally
@@ -438,30 +458,6 @@
            {
                sw.Write(json);
            }
        }
        #endregion

        #region 暂时不用
        /// <summary>
        /// 重采样 *
        /// </summary>
        private static void Resample(Dataset ds, string dest, int width, int height)
        {
            // 设置Warp的选项：https://blog.csdn.net/qq_43210879/article/details/121350561
            string[] options = new string[] {
                "format=GTiff",
                "width=" + width,
                "height=" + height,
                "dstSRS=EPSG:4326"
            };

            OSGeo.GDAL.Driver driver = Gdal.GetDriverByName("GTiff");
            Dataset destDs = driver.Create(dest, width, height, ds.RasterCount, ds.GetRasterBand(1).DataType, null);

            GDALWarpAppOptions warpAppOptions = new GDALWarpAppOptions(options);
            Gdal.Warp(destDs, new Dataset[] { ds }, warpAppOptions, null, null);

            destDs.Dispose();
        }
        #endregion
    }