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| | |
| | | package com.moon.server.service.data; |
| | | |
| | | import org.gdal.gdal.Band; |
| | | import org.gdal.gdal.Dataset; |
| | | import org.gdal.gdal.WarpOptions; |
| | | import org.gdal.gdal.gdal; |
| | | import org.gdal.ogr.Geometry; |
| | | import org.gdal.ogr.ogr; |
| | | import org.springframework.stereotype.Service; |
| | | |
| | | import java.util.ArrayList; |
| | | import java.util.List; |
| | | import java.util.Vector; |
| | | |
| | | /** |
| | | * æ
æ ¼åææå¡ |
| | | * @author LJW |
| | | * @date 2023-9-1 6:16 |
| | | */ |
| | | @Service |
| | | public class RasterAnalysisService { |
| | | public static Dataset clipRaster(Dataset dataset, Geometry geometry) { |
| | | Vector<String> warpOptions = new Vector<>(); |
| | | warpOptions.add("-crop_to_cutline"); |
| | | warpOptions.add("-cutline"); |
| | | warpOptions.add(geometry.ExportToWkt()); |
| | | warpOptions.add("-dstalpha"); |
| | | |
| | | return gdal.Warp("", new Dataset[]{dataset}, new WarpOptions(warpOptions)); |
| | | } |
| | | |
| | | public double[] processClippedDataByLine(String imagePath, String geometryString) { |
| | | // 注åGDALé©±å¨ |
| | | gdal.AllRegister(); |
| | | // æå¼æ
æ ¼å¾åæ°æ®é |
| | | Dataset dataset = gdal.Open(imagePath); |
| | | if (dataset == null) { |
| | | throw new RuntimeException("Failed to open raster dataset."); |
| | | } |
| | | |
| | | Geometry geometry = Geometry.CreateFromWkt(geometryString); |
| | | |
| | | Dataset clippedDataset = clipRaster(dataset, geometry); |
| | | |
| | | int width = clippedDataset.GetRasterXSize(); |
| | | int height = clippedDataset.GetRasterYSize(); |
| | | int bandCount = clippedDataset.getRasterCount(); |
| | | |
| | | List<double[]> sum = new ArrayList<>(); |
| | | for (int bandIndex = 1; bandIndex <= bandCount; bandIndex++) { |
| | | Band band = clippedDataset.GetRasterBand(bandIndex); |
| | | |
| | | double[] pixelValues = new double[width * height]; |
| | | band.ReadRaster(0, 0, width, height, pixelValues); |
| | | |
| | | sum.add(pixelValues); |
| | | } |
| | | |
| | | return calculateAverage(sum); |
| | | } |
| | | |
| | | public double processClippedDataByPolygon(String imagePath, String geometryString) { |
| | | // 注åGDALé©±å¨ |
| | | gdal.AllRegister(); |
| | | // æå¼æ
æ ¼å¾åæ°æ®é |
| | | Dataset dataset = gdal.Open(imagePath); |
| | | if (dataset == null) { |
| | | throw new RuntimeException("Failed to open raster dataset."); |
| | | } |
| | | |
| | | Geometry geometry = Geometry.CreateFromWkt(geometryString); |
| | | |
| | | Dataset clippedDataset = clipRaster(dataset, geometry); |
| | | |
| | | int width = clippedDataset.GetRasterXSize(); |
| | | int height = clippedDataset.GetRasterYSize(); |
| | | int bandCount = clippedDataset.getRasterCount(); |
| | | |
| | | double[] bandSum = new double[bandCount]; |
| | | for (int bandIndex = 1; bandIndex <= bandCount; bandIndex++) { |
| | | Band band = clippedDataset.GetRasterBand(bandIndex); |
| | | |
| | | double[] pixelValues = new double[width * height]; |
| | | band.ReadRaster(0, 0, width, height, pixelValues); |
| | | |
| | | // 夿³¢æ®µå½ä¸åå¤ç |
| | | bandSum[bandIndex - 1] = average(pixelValues); |
| | | } |
| | | return average(bandSum); |
| | | } |
| | | |
| | | public double processPoint(String imagePath, String geometryString, int size) { |
| | | // 注åGDALé©±å¨ |
| | | gdal.AllRegister(); |
| | | // æå¼æ
æ ¼å¾åæ°æ®é |
| | | Dataset dataset = gdal.Open(imagePath); |
| | | if (dataset == null) { |
| | | throw new RuntimeException("Failed to open raster dataset."); |
| | | } |
| | | |
| | | Geometry geometry = Geometry.CreateFromWkt(geometryString); |
| | | |
| | | double[] geoTransform = dataset.GetGeoTransform(); |
| | | double minX = geoTransform[0]; |
| | | double pixelWidth = geoTransform[1]; |
| | | double rotationX = geoTransform[2]; |
| | | double maxY = geoTransform[3]; |
| | | double rotationY = geoTransform[4]; |
| | | double pixelHeight = geoTransform[5]; |
| | | |
| | | double x = geometry.GetX(); |
| | | double y = geometry.GetY(); |
| | | |
| | | int xPixel = (int) Math.floor((x - minX) / pixelWidth); |
| | | int yPixel = (int) Math.floor((maxY - y) / Math.abs(pixelHeight)); |
| | | |
| | | int bandCount = dataset.getRasterCount(); |
| | | |
| | | List<double[]> sum = new ArrayList<>(); |
| | | for (int bandIndex = 1; bandIndex <= bandCount; bandIndex++) { |
| | | double[] pixelValues = new double[size * size]; |
| | | Band band = dataset.GetRasterBand(bandIndex); |
| | | band.ReadRaster(xPixel, yPixel, size, size, pixelValues); |
| | | |
| | | sum.add(pixelValues); |
| | | } |
| | | |
| | | // éæ¾èµæº |
| | | gdal.GDALDestroyDriverManager(); |
| | | |
| | | return average(calculateAverage(sum)); |
| | | } |
| | | |
| | | public List<Double> processLine(String imagePath, String geometryString) { |
| | | // 注åGDALé©±å¨ |
| | | gdal.AllRegister(); |
| | | // æå¼æ
æ ¼å¾åæ°æ®é |
| | | Dataset dataset = gdal.Open(imagePath); |
| | | if (dataset == null) { |
| | | throw new RuntimeException("Failed to open raster dataset."); |
| | | } |
| | | |
| | | Geometry geometry = Geometry.CreateFromWkt(geometryString); |
| | | |
| | | // æ
æ ¼åç´ èå´ |
| | | double[] geoTransform = dataset.GetGeoTransform(); |
| | | double minX = geoTransform[0]; |
| | | double pixelWidth = geoTransform[1]; |
| | | double rotationX = geoTransform[2]; |
| | | double maxY = geoTransform[3]; |
| | | double rotationY = geoTransform[4]; |
| | | double pixelHeight = geoTransform[5]; |
| | | |
| | | // geometryåç´ èå´ |
| | | double[] bounds = new double[6]; |
| | | geometry.GetEnvelope(bounds); |
| | | double startX = bounds[0]; |
| | | double endX = bounds[1]; |
| | | double startY = bounds[2]; |
| | | double endY = bounds[3]; |
| | | |
| | | int xStartPixel = (int) Math.floor((startX - minX) / pixelWidth); |
| | | int ySstartPixel = (int) Math.floor((maxY - startY) / Math.abs(pixelHeight)); |
| | | int xEndPixel = (int) Math.floor((endX - minX) / pixelWidth); |
| | | int yEndPixel = (int) Math.floor((maxY - endY) / Math.abs(pixelHeight)); |
| | | |
| | | List<Double> values = new ArrayList<>(); |
| | | for (int y = Math.min(ySstartPixel, yEndPixel); y <= Math.max(ySstartPixel, yEndPixel); y++) { |
| | | for (int x = Math.min(xStartPixel, xEndPixel); x <= Math.max(xStartPixel, xEndPixel); x++) { |
| | | Geometry point = new Geometry(ogr.wkbPoint); |
| | | point.AddPoint(minX + pixelWidth * x, maxY - pixelHeight * y); |
| | | if (geometry.Contains(point)) { |
| | | values.add(bandValueHandle(dataset, x, y)); |
| | | } |
| | | } |
| | | } |
| | | |
| | | return values; |
| | | } |
| | | |
| | | public double processPolygon(String imagePath, String geometryString) { |
| | | // æå¼æ
æ ¼å¾åæ°æ®é |
| | | Dataset dataset = gdal.Open(imagePath); |
| | | |
| | | if (dataset == null) { |
| | | throw new RuntimeException("Failed to open raster dataset."); |
| | | } |
| | | |
| | | Geometry geometry = Geometry.CreateFromWkt(geometryString); |
| | | |
| | | // æ
æ ¼åç´ èå´ |
| | | double[] geoTransform = dataset.GetGeoTransform(); |
| | | double minX = geoTransform[0]; |
| | | double pixelWidth = geoTransform[1]; |
| | | double rotationX = geoTransform[2]; |
| | | double maxY = geoTransform[3]; |
| | | double rotationY = geoTransform[4]; |
| | | double pixelHeight = geoTransform[5]; |
| | | |
| | | // geometryåç´ èå´ |
| | | double[] env = new double[6]; |
| | | geometry.GetEnvelope(env); |
| | | int xMinPixel = (int) Math.floor((env[0] - minX) / pixelWidth); |
| | | int yMinPixel = (int) Math.floor((maxY - env[3]) / Math.abs(pixelHeight)); |
| | | int xMaxPixel = (int) Math.ceil((env[1] - minX) / pixelWidth); |
| | | int yMaxPixel = (int) Math.ceil((maxY - env[2]) / Math.abs(pixelHeight)); |
| | | |
| | | int bandCount = dataset.getRasterCount(); |
| | | int geometryWidth = Math.abs(xMaxPixel - xMinPixel); |
| | | int geometryHeight = Math.abs(yMaxPixel - yMinPixel); |
| | | |
| | | List<double[]> sum = new ArrayList<>(); |
| | | for (int bandIndex = 1; bandIndex <= bandCount; bandIndex++) { |
| | | Band band = dataset.GetRasterBand(bandIndex); |
| | | |
| | | double[] pixelValues = new double[geometryWidth * geometryHeight]; |
| | | band.ReadRaster(xMinPixel, yMinPixel, geometryWidth, geometryHeight, pixelValues); |
| | | |
| | | // 夿³¢æ®µå½ä¸åå¤ç |
| | | sum.add(pixelValues); |
| | | } |
| | | |
| | | return average(calculateAverage(sum)); |
| | | } |
| | | |
| | | public static double average(double[] values) { |
| | | double sum = 0; |
| | | for (double value : values) { |
| | | sum += value; |
| | | } |
| | | return sum / values.length; |
| | | } |
| | | |
| | | public static double[] calculateAverage(List<double[]> list) { |
| | | if (list == null || list.isEmpty()) { |
| | | return new double[0]; |
| | | } |
| | | |
| | | int arrayLength = list.get(0).length; |
| | | double[] outArray = new double[arrayLength]; |
| | | |
| | | for (int i = 0; i < arrayLength; i++) { |
| | | double sum = 0; |
| | | |
| | | for (double[] array : list) { |
| | | sum += array[i]; |
| | | } |
| | | |
| | | outArray[i] = sum / list.size(); |
| | | } |
| | | |
| | | return outArray; |
| | | } |
| | | |
| | | public static double bandValueHandle(Dataset dataset, int x, int y) { |
| | | double[] bandSum = new double[dataset.getRasterCount()]; |
| | | for (int bandIndex = 1; bandIndex <= dataset.getRasterCount(); bandIndex++) { |
| | | double[] pixelValues = new double[1]; |
| | | Band band = dataset.GetRasterBand(bandIndex); |
| | | band.ReadRaster(x, y, 1, 1, pixelValues); |
| | | |
| | | bandSum[bandIndex - 1] = pixelValues[0]; |
| | | } |
| | | |
| | | return average(bandSum); |
| | | } |
| | | } |