| | |
| | | package com.moon.server.service.data; |
| | | |
| | | import com.alibaba.fastjson.JSONObject; |
| | | import com.moon.server.entity.all.StaticData; |
| | | import com.moon.server.entity.data.AnalysisResultEntity; |
| | | import com.moon.server.entity.data.MetaEntity; |
| | | import com.moon.server.entity.data.PublishEntity; |
| | | import com.moon.server.helper.GeoHelper; |
| | | import com.moon.server.helper.PathHelper; |
| | | import com.moon.server.helper.StringHelper; |
| | | import com.moon.server.helper.WebHelper; |
| | | import com.moon.server.service.all.WebSocketService; |
| | | import org.apache.commons.logging.Log; |
| | | import org.apache.commons.logging.LogFactory; |
| | | import org.gdal.gdal.Band; |
| | |
| | | import org.gdal.gdal.gdal; |
| | | import org.gdal.ogr.Geometry; |
| | | import org.gdal.ogr.ogr; |
| | | import org.gdal.osr.SpatialReference; |
| | | import org.opengis.referencing.crs.CoordinateReferenceSystem; |
| | | import org.springframework.beans.factory.annotation.Value; |
| | | import org.springframework.stereotype.Service; |
| | | import org.geotools.referencing.CRS; |
| | | import sun.awt.IconInfo; |
| | | |
| | | import javax.annotation.Resource; |
| | | import java.awt.geom.Point2D; |
| | | import java.io.File; |
| | | import java.io.FileWriter; |
| | | import java.io.IOException; |
| | | import java.util.*; |
| | | |
| | | /** |
| | |
| | | */ |
| | | @Service |
| | | public class RasterAnalysisService { |
| | | @Value("${sys.gdal_path}") |
| | | String gdalPath; |
| | | |
| | | @Resource |
| | | PathHelper pathHelper; |
| | | |
| | |
| | | PublishService publishService; |
| | | |
| | | private final static Log log = LogFactory.getLog(RasterAnalysisService.class); |
| | | |
| | | /** |
| | | * 测试 |
| | | * <p> |
| | | * POINT (26.72 -48.58) |
| | | * LINESTRING(18.44 -46.69,20.14 -45.93) |
| | | * POLYGON ((5.11 -41.64,7.68 -43.59,4.73 -43.3,5.11 -41.64)) |
| | | * POLYGON ((42.6 -40.3,49.1 -40.4,49.1 -65.7,46.3 -65.6,42.6 -40.3)) |
| | | */ |
| | | public List<AnalysisResultEntity> test(Geometry geo, Integer size) { |
| | | List<AnalysisResultEntity> rs = new ArrayList<>(); |
| | | AnalysisResultEntity entity = new AnalysisResultEntity(); |
| | | entity.setLayerName("Test"); |
| | | |
| | | openRaster(entity, "D:\\Moon\\data\\DOM\\Lunar_LRO_LOLA_ClrShade_Global_128ppd_v04_2.tif", geo, size); |
| | | rs.add(entity); |
| | | |
| | | return rs; |
| | | } |
| | | |
| | | /** |
| | | * 使用WKT查询分析,结果以消息推送 |
| | | */ |
| | | public void analysisForPost(Geometry geo, Integer size, String token) { |
| | | List<PublishEntity> pubs = publishService.selectRaster(); |
| | | if (null == pubs || pubs.isEmpty()) { |
| | | return; |
| | | } |
| | | |
| | | //for (PublishEntity pub : pubs) { |
| | | pubs.parallelStream().forEach(pub -> { |
| | | try { |
| | | AnalysisResultEntity entity = new AnalysisResultEntity(token); |
| | | entity.setLayerName(pub.getName()); |
| | | entity.setUnit(pub.getUnit()); |
| | | |
| | | List<MetaEntity> metas = publishService.selectMetasByPubid(pub.getId()); |
| | | if (null == metas || metas.isEmpty()) { |
| | | setError(entity, "找不到发布数据"); |
| | | postInfo(entity); |
| | | return; |
| | | } |
| | | |
| | | String filePath = getFilePath(metas); |
| | | File file = new File(filePath); |
| | | if (!file.exists() || file.isDirectory()) { |
| | | setError(entity, "源数据不存在"); |
| | | postInfo(entity); |
| | | return; |
| | | } |
| | | |
| | | openRaster(entity, filePath, geo, size); |
| | | postInfo(entity); |
| | | } catch (Exception ex) { |
| | | log.error(ex.getMessage(), ex); |
| | | } |
| | | }); |
| | | } |
| | | |
| | | /** |
| | | * 获取文件路径 |
| | | */ |
| | | private String getFilePath(List<MetaEntity> metas) throws IOException { |
| | | String basePath = pathHelper.getConfig().getUploadPath() + File.separator; |
| | | if (metas.size() == 1) { |
| | | return basePath + metas.get(0).getPath(); |
| | | } |
| | | |
| | | String tempPath = pathHelper.getTempPath() + File.separator, guid = StringHelper.getGuid(); |
| | | String fileList = tempPath + guid + ".txt"; |
| | | FileWriter fw = new FileWriter(fileList); |
| | | for (int i = 0, c = metas.size(); i < c; i++) { |
| | | String str = (i > 0 ? "\r\n" : "") + basePath + metas.get(i).getPath(); |
| | | fw.write(str.toCharArray()); |
| | | } |
| | | fw.close(); |
| | | |
| | | String vrt = tempPath + guid + ".vrt"; |
| | | String cmd = String.format("\"%s\\gdalbuildvrt.exe\" -input_file_list \"%s\" \"%s\"", gdalPath, fileList, vrt); |
| | | WebHelper.exec(cmd); |
| | | |
| | | return vrt; |
| | | } |
| | | |
| | | /** |
| | | * 推送消息 |
| | | */ |
| | | private void postInfo(AnalysisResultEntity entity) throws IOException { |
| | | JSONObject map = new JSONObject(); |
| | | map.put("analysisForPost", entity); |
| | | |
| | | String json = JSONObject.toJSONString(map); |
| | | //System.out.println(json) |
| | | |
| | | WebSocketService.broadCastInfo(json); |
| | | } |
| | | |
| | | /** |
| | | * 分析方法 |
| | |
| | | } |
| | | |
| | | for (PublishEntity pub : pubs) { |
| | | AnalysisResultEntity entity = new AnalysisResultEntity(); |
| | | entity.setLayerName(pub.getName()); |
| | | try { |
| | | AnalysisResultEntity entity = new AnalysisResultEntity(); |
| | | entity.setLayerName(pub.getName()); |
| | | entity.setUnit(pub.getUnit()); |
| | | |
| | | List<MetaEntity> metas = publishService.selectMetasByPubid(pub.getId()); |
| | | if (null == metas || metas.isEmpty()) { |
| | | setError(entity, "找不到发布数据"); |
| | | continue; |
| | | List<MetaEntity> metas = publishService.selectMetasByPubid(pub.getId()); |
| | | if (null == metas || metas.isEmpty()) { |
| | | setError(entity, "找不到发布数据"); |
| | | continue; |
| | | } |
| | | |
| | | String filePath = getFilePath(metas); |
| | | File file = new File(filePath); |
| | | if (!file.exists() || file.isDirectory()) { |
| | | setError(entity, "源数据不存在"); |
| | | continue; |
| | | } |
| | | |
| | | openRaster(entity, filePath, geo, size); |
| | | rs.add(entity); |
| | | } catch (Exception ex) { |
| | | log.error(ex.getMessage(), ex); |
| | | } |
| | | |
| | | String filePath = pathHelper.getConfig().getUploadPath() + File.separator + metas.get(0).getPath(); |
| | | File file = new File(filePath); |
| | | if (!file.exists() || file.isDirectory()) { |
| | | setError(entity, "源数据不存在"); |
| | | continue; |
| | | } |
| | | |
| | | openRaster(entity, filePath, geo, size); |
| | | rs.add(entity); |
| | | } |
| | | |
| | | return rs; |
| | | } |
| | | |
| | |
| | | private void openRaster(AnalysisResultEntity entity, String filePath, Geometry geo, int size) { |
| | | Dataset ds = null; |
| | | try { |
| | | // filePath = "D:\\Moon\\data\\DOM\\test.tif" |
| | | ds = gdal.Open(filePath); |
| | | if (null == ds) { |
| | | throw new Exception("打开栅格数据失败"); |
| | |
| | | } |
| | | |
| | | /** |
| | | * 分析点 |
| | | */ |
| | | public void analysisPoint2(AnalysisResultEntity entity, Dataset ds, Geometry geo, int size) { |
| | | double x = geo.GetX(), y = geo.GetY(); |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = transform[5]; |
| | | |
| | | int bandCount = ds.getRasterCount(); |
| | | int xPixel = (int) Math.floor((x - minX) / pixelWidth); |
| | | int yPixel = (int) Math.floor((maxY - y) / Math.abs(pixelHeight)); |
| | | |
| | | List<double[]> list = new ArrayList<>(); |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | double[] pixelValues = new double[size * size]; |
| | | Band band = ds.GetRasterBand(i); |
| | | band.ReadRaster(xPixel, yPixel, size, size, pixelValues); |
| | | |
| | | list.add(pixelValues); |
| | | } |
| | | |
| | | processResult(entity, list); |
| | | } |
| | | |
| | | /** |
| | | * 分析线 |
| | | */ |
| | | public void analysisPolyline(AnalysisResultEntity entity, Dataset ds, Geometry geo, int size) { |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | int xSize = ds.getRasterXSize(), ySize = ds.getRasterYSize(); |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = transform[5]; |
| | | |
| | | double len = 0; |
| | | int bandCount = ds.getRasterCount(); |
| | | double lineDis = getPolylineDistance(geo); |
| | | double distance = lineDis / Math.max(geo.GetPointCount(), size); |
| | | |
| | | List<double[]> points = getPointsByDistance(geo, distance); |
| | | for (double[] xy : points) { |
| | | for (int i = 0, c = points.size(); i < c; i++) { |
| | | double[] xy = points.get(i); |
| | | if (i > 0) { |
| | | double[] p = points.get(i - 1); |
| | | len += GeoHelper.getDistance(p[0], p[1], xy[0], xy[1]); |
| | | } |
| | | |
| | | int xPixel = (int) Math.floor((xy[0] - minX) / pixelWidth); |
| | | int yPixel = (int) Math.floor((maxY - xy[1]) / Math.abs(pixelHeight)); |
| | | if (xPixel < 1 || xPixel > xSize || yPixel < 1 || yPixel > ySize) { |
| | | continue; |
| | | } |
| | | |
| | | List<Double> vals = new ArrayList<>(); |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | for (int j = 1; j <= bandCount; j++) { |
| | | double[] pixelValues = new double[1]; |
| | | ds.GetRasterBand(i).ReadRaster(xPixel, yPixel, 1, 1, pixelValues); |
| | | vals.add(pixelValues[0]); |
| | | } |
| | | entity.addPoint(xy[0], xy[1], vals); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 分析线 |
| | | */ |
| | | public void analysisPolyline2(AnalysisResultEntity entity, Dataset ds, Geometry geo, int size) { |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = Math.abs(transform[5]); |
| | | |
| | | double buffer = Math.max(pixelWidth, pixelHeight) * size; |
| | | double[] env = new double[4]; |
| | | geo = geo.Buffer(buffer); |
| | | geo.GetEnvelope(env); |
| | | |
| | | int xMinPixel = (int) Math.floor((env[0] - minX) / pixelWidth); |
| | | int yMinPixel = (int) Math.floor((maxY - env[3]) / pixelHeight); |
| | | int xMaxPixel = (int) Math.floor((env[1] - minX) / pixelWidth); |
| | | int yMaxPixel = (int) Math.floor((maxY - env[2]) / pixelHeight); |
| | | |
| | | int bandCount = ds.getRasterCount(); |
| | | int xMin = Math.min(xMinPixel, xMaxPixel); |
| | | int xMax = Math.max(xMinPixel, xMaxPixel); |
| | | int yMin = Math.min(yMinPixel, yMaxPixel); |
| | | int yMax = Math.max(yMinPixel, yMaxPixel); |
| | | |
| | | List<Double> list = new ArrayList<>(); |
| | | for (int y = yMin; y <= yMax; y++) { |
| | | for (int x = xMin; x <= xMax; x++) { |
| | | Geometry point = new Geometry(ogr.wkbPoint); |
| | | point.AddPoint(minX + pixelWidth * x, maxY - pixelHeight * y); |
| | | if (geo.Intersects(point)) { |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | double[] values = new double[1]; |
| | | ds.GetRasterBand(i).ReadRaster(x, y, 1, 1, values); |
| | | list.add(values[0]); |
| | | } |
| | | ds.GetRasterBand(j).ReadRaster(xPixel, yPixel, 1, 1, pixelValues); |
| | | if (isValid(pixelValues[0])) { |
| | | vals.add(WebHelper.round(pixelValues[0], 3)); |
| | | } |
| | | } |
| | | if (vals.size() > 0) { |
| | | entity.addPoint(xy[0], xy[1], len, vals); |
| | | } |
| | | } |
| | | |
| | | processResult(list, entity); |
| | | } |
| | | |
| | | /** |
| | |
| | | */ |
| | | public void analysisPolygon(AnalysisResultEntity entity, Dataset ds, Geometry geo) { |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = Math.abs(transform[5]); |
| | | int xSize = ds.getRasterXSize(), ySize = ds.getRasterYSize(); |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = Math.abs(transform[5]), rotationX = transform[2], rotationY = transform[4]; |
| | | double[] env = new double[4]; |
| | | geo.GetEnvelope(env); |
| | | entity.addPoint(geo.Centroid().GetX(), geo.Centroid().GetY(), 0, null); |
| | | |
| | | int xMinPixel = (int) Math.floor((env[0] - minX) / pixelWidth); |
| | | int yMinPixel = (int) Math.floor((maxY - env[3]) / pixelHeight); |
| | | int xMaxPixel = (int) Math.floor((env[1] - minX) / pixelWidth); |
| | | int yMaxPixel = (int) Math.floor((maxY - env[2]) / pixelHeight); |
| | | |
| | | int bandCount = ds.getRasterCount(); |
| | | int geoWidth = Math.abs(xMaxPixel - xMinPixel); |
| | | int geoHeight = Math.abs(yMaxPixel - yMinPixel); |
| | | |
| | | List<double[]> list = new ArrayList<>(); |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | Band band = ds.GetRasterBand(i); |
| | | double[] pixelValues = new double[geoWidth * geoHeight]; |
| | | band.ReadRaster(xMinPixel, yMinPixel, geoWidth, geoHeight, pixelValues); |
| | | |
| | | list.add(pixelValues); |
| | | int xMinPixel = Math.max((int) Math.floor((env[0] - minX) / pixelWidth), 1); |
| | | int yMinPixel = Math.max((int) Math.floor((maxY - env[3]) / pixelHeight), 1); |
| | | int xMaxPixel = Math.min((int) Math.floor((env[1] - minX) / pixelWidth), xSize); |
| | | int yMaxPixel = Math.min((int) Math.floor((maxY - env[2]) / pixelHeight), ySize); |
| | | if (xMaxPixel < 1 || yMaxPixel < 1 || xMaxPixel - xMinPixel < 0 || yMaxPixel - yMinPixel < 0) { |
| | | setError(entity, "查询范围无效"); |
| | | return; |
| | | } |
| | | |
| | | processResult(entity, list); |
| | | int bandCount = ds.getRasterCount(); |
| | | int width = xMaxPixel - xMinPixel; |
| | | int height = yMaxPixel - yMinPixel; |
| | | if (width * height > StaticData.I64 * StaticData.I64) { |
| | | readRasterForBlocks(entity, ds, bandCount, xMinPixel, yMinPixel, width, height); |
| | | return; |
| | | } |
| | | |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | double[] pixelValues = new double[width * height]; |
| | | ds.GetRasterBand(i).ReadRaster(xMinPixel, yMinPixel, width, height, pixelValues); |
| | | setBandVals(entity, pixelValues); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 按照块读取栅格数据 |
| | | */ |
| | | private void readRasterForBlocks(AnalysisResultEntity entity, Dataset ds, int bandCount, int xMinPixel, int yMinPixel, int width, int height) { |
| | | List<Integer> xList = getSamples(xMinPixel, width - 1); |
| | | List<Integer> yList = getSamples(yMinPixel, height - 1); |
| | | |
| | | double[] pixelValues = new double[1]; |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | List<Double> list = new ArrayList<>(); |
| | | for (Integer x : xList) { |
| | | for (Integer y : yList) { |
| | | ds.GetRasterBand(i).ReadRaster(x, y, 1, 1, pixelValues); |
| | | if (isValid(pixelValues[0])) { |
| | | list.add(pixelValues[0]); |
| | | } |
| | | } |
| | | } |
| | | setBandVals(entity, list); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 获取抽样列表 |
| | | */ |
| | | private List<Integer> getSamples(int start, int strip) { |
| | | List<Integer> list = new ArrayList<>(); |
| | | |
| | | double avg = 1.0 * strip / (StaticData.I64 - 1); |
| | | for (int i = 0; i < StaticData.I64; i++) { |
| | | list.add(start + (int) Math.ceil(avg * i)); |
| | | } |
| | | |
| | | return list; |
| | | } |
| | | |
| | | /** |
| | |
| | | } |
| | | |
| | | /** |
| | | * 处理结果 |
| | | * 设置Band值 |
| | | */ |
| | | private void processResult(AnalysisResultEntity entity, List<double[]> list) { |
| | | private void setBandVals(AnalysisResultEntity entity, double[] pixelValues) { |
| | | if (null == pixelValues || pixelValues.length == 0) { |
| | | return; |
| | | } |
| | | |
| | | List<Double> list = new ArrayList<>(); |
| | | for (double val : pixelValues) { |
| | | if (isValid(val)) { |
| | | list.add(val); |
| | | } |
| | | } |
| | | setBandVals(entity, list); |
| | | } |
| | | |
| | | /** |
| | | * 值是否有效 |
| | | */ |
| | | public static boolean isValid(Double val) { |
| | | return !Double.isNaN(val) && val > Integer.MIN_VALUE; |
| | | } |
| | | |
| | | /** |
| | | * 设置Band值 |
| | | */ |
| | | private void setBandVals(AnalysisResultEntity entity, List<Double> list) { |
| | | if (null == list || list.isEmpty()) { |
| | | return; |
| | | } |
| | | |
| | | List<Double> rs = new ArrayList<>(); |
| | | for (double[] ds : list) { |
| | | if (null != ds && ds.length > 0) { |
| | | for (double d : ds) { |
| | | rs.add(d); |
| | | } |
| | | } |
| | | } |
| | | |
| | | processResult(rs, entity); |
| | | } |
| | | |
| | | /** |
| | | * 处理结果 |
| | | */ |
| | | private void processResult(List<Double> rs, AnalysisResultEntity entity) { |
| | | if (null == rs || rs.isEmpty()) { |
| | | return; |
| | | } |
| | | |
| | | double avg = rs.stream().mapToDouble(Double::valueOf).average().getAsDouble(); |
| | | entity.setMin(Collections.min(rs)); |
| | | entity.setMax(Collections.max(rs)); |
| | | entity.setAvg(avg); |
| | | } |
| | | |
| | | public void processClippedDataByLine(String imagePath, String geometryString) { |
| | | // 注册GDAL驱动 |
| | | gdal.AllRegister(); |
| | | // 打开栅格图像数据集 |
| | | 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); |
| | | } |
| | | } |
| | | |
| | | 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)); |
| | | double min = Collections.min(list); |
| | | double max = Collections.max(list); |
| | | double avg = list.stream().mapToDouble(Double::valueOf).average().getAsDouble(); |
| | | entity.addBandVals(min, avg, max); |
| | | } |
| | | |
| | | /** |
| | |
| | | d += distance; |
| | | } |
| | | } |
| | | |
| | | list.add(geo.GetPoint(c)); |
| | | |
| | | return list; |
| | | } |
| | | |
| | | /** |
| | | * 分析点 2 |
| | | */ |
| | | public void analysisPoint2(AnalysisResultEntity entity, Dataset ds, Geometry geo, int size) { |
| | | double x = geo.GetX(), y = geo.GetY(); |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = transform[5]; |
| | | |
| | | int bandCount = ds.getRasterCount(); |
| | | int xPixel = (int) Math.floor((x - minX) / pixelWidth); |
| | | int yPixel = (int) Math.floor((maxY - y) / Math.abs(pixelHeight)); |
| | | |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | double[] pixelValues = new double[size * size]; |
| | | Band band = ds.GetRasterBand(i); |
| | | band.ReadRaster(xPixel, yPixel, size, size, pixelValues); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 分析线 2 |
| | | */ |
| | | public void analysisPolyline2(AnalysisResultEntity entity, Dataset ds, Geometry geo, int size) { |
| | | double[] transform = ds.GetGeoTransform(); |
| | | // double rotationX = transform[2]; double rotationY = transform[4] |
| | | double minX = transform[0], pixelWidth = transform[1], maxY = transform[3], pixelHeight = Math.abs(transform[5]); |
| | | |
| | | double buffer = Math.max(pixelWidth, pixelHeight) * size; |
| | | double[] env = new double[4]; |
| | | geo = geo.Buffer(buffer); |
| | | geo.GetEnvelope(env); |
| | | |
| | | int xMinPixel = (int) Math.floor((env[0] - minX) / pixelWidth); |
| | | int yMinPixel = (int) Math.floor((maxY - env[3]) / pixelHeight); |
| | | int xMaxPixel = (int) Math.floor((env[1] - minX) / pixelWidth); |
| | | int yMaxPixel = (int) Math.floor((maxY - env[2]) / pixelHeight); |
| | | |
| | | int bandCount = ds.getRasterCount(); |
| | | int xMin = Math.min(xMinPixel, xMaxPixel); |
| | | int xMax = Math.max(xMinPixel, xMaxPixel); |
| | | int yMin = Math.min(yMinPixel, yMaxPixel); |
| | | int yMax = Math.max(yMinPixel, yMaxPixel); |
| | | |
| | | List<Double> list = new ArrayList<>(); |
| | | for (int y = yMin; y <= yMax; y++) { |
| | | for (int x = xMin; x <= xMax; x++) { |
| | | Geometry point = new Geometry(ogr.wkbPoint); |
| | | point.AddPoint(minX + pixelWidth * x, maxY - pixelHeight * y); |
| | | if (geo.Intersects(point)) { |
| | | for (int i = 1; i <= bandCount; i++) { |
| | | double[] values = new double[1]; |
| | | ds.GetRasterBand(i).ReadRaster(x, y, 1, 1, values); |
| | | list.add(values[0]); |
| | | } |
| | | } |
| | | } |
| | | } |
| | | // processResult(list, entity) |
| | | } |
| | | |
| | | private void processClippedDataByLine(String imagePath, String geometryString) { |
| | | // 注册GDAL驱动 |
| | | gdal.AllRegister(); |
| | | // 打开栅格图像数据集 |
| | | 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); |
| | | } |
| | | } |
| | | |
| | | private 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)); |
| | | } |
| | | } |