Java+Geotools+WContour+Openlayers实现等值线等值面功能

package com.lzugis.geotools; import com.amazonaws.util.json.JSONObject; import com.lzugis.CommonMethod; import com.lzugis.geotools.utils.FeaureUtil; import com.lzugis.geotools.utils.GeoJSONUtil; import com.vividsolutions.jts.geom.Geometry; import org.geotools.data.FeatureSource; import org.geotools.data.shapefile.ShapefileDataStore; import org.geotools.data.simple.SimpleFeatureCollection; import org.geotools.data.simple.SimpleFeatureSource; import org.geotools.feature.FeatureCollection; import org.geotools.feature.FeatureIterator; import org.geotools.geojson.feature.FeatureJSON; import org.opengis.feature.Feature; import org.opengis.feature.simple.SimpleFeature; import wContour.Contour; import wContour.Global.Border; import wContour.Global.PointD; import wContour.Global.PolyLine; import wContour.Global.Polygon; import wContour.Interpolate; import java.io.File; import java.io.StringWriter; import java.nio.charset.Charset; import java.util.*; /** * Created by admin on 2017/8/29. */ public class EquiSurface { /** * 生成等值面 * * @param trainData 训练数据 * @param dataInterval 数据间隔 * @param size 大小，宽，高 * @param boundryFile 四至 * @param isclip 是否裁剪 * @return */ public String calEquiSurface(double[][] trainData, double[] dataInterval, int[] size, String boundryFile, boolean isclip) { String geojsonpogylon = ""; try { double _undefData = -9999.0; SimpleFeatureCollection polygonCollection = null; List<PolyLine> cPolylineList = new ArrayList<PolyLine>(); List<Polygon> cPolygonList = new ArrayList<Polygon>(); int width = size[0], height = size[1]; double[] _X = new double[width]; double[] _Y = new double[height]; File file = new File(boundryFile); ShapefileDataStore shpDataStore = null; shpDataStore = new ShapefileDataStore(file.toURL()); //设置编码 Charset charset = Charset.forName("GBK"); shpDataStore.setCharset(charset); String typeName = shpDataStore.getTypeNames()[0]; SimpleFeatureSource featureSource = null; featureSource = shpDataStore.getFeatureSource(typeName); SimpleFeatureCollection fc = featureSource.getFeatures(); double minX = fc.getBounds().getMinX(); double minY = fc.getBounds().getMinY(); double maxX = fc.getBounds().getMaxX(); double maxY = fc.getBounds().getMaxY(); Interpolate.CreateGridXY_Num(minX, minY, maxX, maxY, _X, _Y); double[][] _gridData = new double[width][height]; int nc = dataInterval.length; _gridData = Interpolate.Interpolation_IDW_Neighbor(trainData, _X, _Y, 12, _undefData);// IDW插值 int[][] S1 = new int[_gridData.length][_gridData[0].length]; List<Border> _borders = Contour.tracingBorders(_gridData, _X, _Y, S1, _undefData); cPolylineList = Contour.tracingContourLines(_gridData, _X, _Y, nc, dataInterval, _undefData, _borders, S1);// 生成等值线 cPolylineList = Contour.smoothLines(cPolylineList);// 平滑 cPolygonList = Contour.tracingPolygons(_gridData, cPolylineList, _borders, dataInterval); geojsonpogylon = getPolygonGeoJson(cPolygonList); if (isclip) { polygonCollection = GeoJSONUtil.readGeoJsonByString(geojsonpogylon); FeatureSource dc = clipFeatureCollection(fc, polygonCollection); geojsonpogylon = getPolygonGeoJson(dc.getFeatures()); } } catch (Exception e) { e.printStackTrace(); } return geojsonpogylon; } private FeatureSource clipFeatureCollection(FeatureCollection fc, SimpleFeatureCollection gs) { FeatureSource cs = null; try { List<Map<String, Object>> values = new ArrayList<Map<String, Object>>(); FeatureIterator contourFeatureIterator = gs.features(); FeatureIterator dataFeatureIterator = fc.features(); while (dataFeatureIterator.hasNext()) { Feature dataFeature = dataFeatureIterator.next(); Geometry dataGeometry = (Geometry) dataFeature.getProperty( "the_geom").getValue(); while (contourFeatureIterator.hasNext()) { Feature contourFeature = contourFeatureIterator.next(); Geometry contourGeometry = (Geometry) contourFeature .getProperty("geometry").getValue(); double lv = (Double) contourFeature.getProperty("lvalue") .getValue(); double hv = (Double) contourFeature.getProperty("hvalue") .getValue(); if (dataGeometry.intersects(contourGeometry)) { Geometry geo = dataGeometry .intersection(contourGeometry); Map<String, Object> map = new HashMap<String, Object>(); map.put("the_geom", geo); map.put("lvalue", lv); map.put("hvalue", hv); values.add(map); } } } contourFeatureIterator.close(); dataFeatureIterator.close(); SimpleFeatureCollection sc = FeaureUtil .creatSimpleFeatureByFeilds( "polygons", "crs:4326,the_geom:MultiPolygon,lvalue:double,hvalue:double", values); cs = FeaureUtil.creatFeatureSourceByCollection(sc); } catch (Exception e) { e.printStackTrace(); return cs; } return cs; } private String getPolygonGeoJson(FeatureCollection fc) { FeatureJSON fjson = new FeatureJSON(); StringBuffer sb = new StringBuffer(); try { sb.append("{\"type\": \"FeatureCollection\",\"features\": "); FeatureIterator itertor = fc.features(); List<String> list = new ArrayList<String>(); while (itertor.hasNext()) { SimpleFeature feature = (SimpleFeature) itertor.next(); StringWriter writer = new StringWriter(); fjson.writeFeature(feature, writer); list.add(writer.toString()); } itertor.close(); sb.append(list.toString()); sb.append("}"); } catch (Exception e) { e.printStackTrace(); } return sb.toString(); } private String getPolygonGeoJson(List<Polygon> cPolygonList) { String geo = null; String geometry = " { \"type\":\"Feature\",\"geometry\":"; String properties = ",\"properties\":{ \"hvalue\":"; String head = "{\"type\": \"FeatureCollection\"," + "\"features\": ["; String end = " ] }"; if (cPolygonList == null || cPolygonList.size() == 0) { return null; } try { for (Polygon pPolygon : cPolygonList) { List<Object> ptsTotal = new ArrayList<Object>(); List<Object> pts = new ArrayList<Object>(); PolyLine pline = pPolygon.OutLine;