一、java代码
package cn.cepec.talroad.air.common;
import cn.cepec.talroad.air.common.geoutil.FeaureUtil;
import cn.cepec.talroad.air.common.geoutil.GeoJSONUtil;
import com.vividsolutions.jts.geom.Geometry;
import net.sf.json.JSONObject;
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.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class InterpolationUtils {
/**
* 生成等值面
*
* @param trainData 训练数据double[size][3],r，lon、lat、value
* @param dataInterval 数据间隔double[0.0001,25,50,100,200,300]
* @param size 大小，宽，高new int[]{100, 100};
* @param boundryFile 四至.shp
* @param isclip 是否裁剪
* @return
*/
// 解析Shapefile文件
public static String calEquiSurface(double[][] trainData, double[] dataInterval, int[] size, String boundryFile,
boolean isclip) {
String geojsonpogylon = "";
try {
double _undefData = -9999.0;
// 多边形集合
SimpleFeatureCollection polygonCollection = null;
// 多边形线集合
List<PolyLine> cPolylineList = new ArrayList<PolyLine>();
// 多边形List
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);
// 源shape文件
ShapefileDataStore shpDataStore = null;
shpDataStore = new ShapefileDataStore(file.toURL());
// 设置编码
Charset charset = Charset.forName("GBK");
shpDataStore.setCharset(charset);
// 获取文件后缀名
String typeName = shpDataStore.getTypeNames()[0];
// SimpleFeatureSource相当于AE中的featureClass，设置属性
SimpleFeatureSource featureSource = null;
featureSource = shpDataStore.getFeatureSource();
SimpleFeatureCollection fc = featureSource.getFeatures();
// 最大最小经纬度
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];
// 数据间隔长度
int nc = dataInterval.length;
// IDW插值 （训练数据（离散数据阵列）、宽（栅格X阵）、高（栅格Y阵）、默认数（最近邻居数））
_gridData = Interpolate.interpolation_IDW_Neighbor(trainData, _X, _Y, 12, _undefData);
int[][] S1 = new int[_gridData.length][_gridData[0].length];
// 边界
List<Border> _borders = Contour.tracingBorders(_gridData, _X, _Y, S1, _undefData);
// 生成等值线（IDW插值、宽、高、数据间隔长度、数据间隔、默认值、边界、IDW长度）
cPolylineList = Contour.tracingContourLines(_gridData, _X, _Y, nc, dataInterval, _undefData, _borders, S1);
// 平滑
cPolylineList = Contour.smoothLines(cPolylineList);
cPolygonList = Contour.tracingPolygons(_gridData, cPolylineList, _borders, dataInterval);
// 多边形Json
geojsonpogylon = getPolygonGeoJson(cPolygonList);
if (isclip) {
// 读取GeoJSON字符串 返回 SimpleFeatureCollection 要素集合
polygonCollection = GeoJSONUtil.readGeoJsonByString(geojsonpogylon);
// 裁剪等值面
FeatureSource dc = clipFeatureCollection(fc, polygonCollection);
// 得到多边形GeoJson
geojsonpogylon = getPolygonGeoJson(dc.getFeatures());
}
} catch (Exception e) {
e.printStackTrace();
}
return geojsonpogylon;
}
/**
* 生成等值线
*
* @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 static String calEquiSurfaceLine(double[][] trainData, double[] dataInterval, int[] size, String boundryFile,
boolean isclip) {
String geojsonline = "";
try {
double _undefData = -9999.0;
SimpleFeatureCollection polylineCollection = 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];
/**
* double[][] S0,
* double[] X,
* double[] Y,
* int[][] S1,
* double undefData
*/
List<Border> _borders = Contour.tracingBorders(_gridData, _X, _Y,
S1, _undefData);
/**
* double[][] S0,
* double[] X,
* double[] Y,
* int nc,
* double[] contour,
* double undefData,
* List<Border> borders,
* int[][] S1
*/
cPolylineList = Contour.tracingContourLines(_gridData, _X, _Y, nc,
dataInterval, _undefData, _borders, S1);// 生成等值线
cPolylineList = Contour.smoothLines(cPolylineList);// 平滑
geojsonline = getPolylineGeoJson(cPolylineList);
if (isclip) {
polylineCollection = GeoJSONUtil.readGeoJsonByString(geojsonline);
FeatureSource dc = clipFeatureLineCollection(fc, polylineCollection);
geojsonline = getPolylineGeoJson(dc.getFeatures());
}
} catch (Exception e) {
e.printStackTrace();
}
return geojsonline;
}
// 等值面
private static 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;
for (PointD ptD : pline.PointList) {
List<Double> pt = new ArrayList<Double>();
pt.add(ptD.X);
pt.add(ptD.Y);
pts.add(pt);
}
ptsTotal.add(pts);
if (pPolygon.HasHoles()) {
for (PolyLine cptLine : pPolygon.HoleLines) {
List<Object> cpts = new ArrayList<Object>();
for (PointD ccptD : cptLine.PointList) {
List<Double> pt = new ArrayList<Double>();
pt.add(ccptD.X);
pt.add(ccptD.Y);
cpts.add(pt);
}
if (cpts.size() > 0) {
ptsTotal.add(cpts);
}
}
}
JSONObject js = new JSONObject();
js.put("type", "Polygon");
js.put("coordinates", ptsTotal);
double hv = pPolygon.HighValue;
double lv = pPolygon.LowValue;
if (hv == lv) {
if (pPolygon.IsClockWise) {
if (!pPolygon.IsHighCenter) {
hv = hv - 0.1;
lv = lv - 0.1;
}
} else {
if (!pPolygon.IsHighCenter) {
hv = hv - 0.1;
lv = lv - 0.1;
}
}
} else {
if (!pPolygon.IsClockWise) {
lv = lv + 0.1;
} else {
if (pPolygon.IsHighCenter) {
hv = hv - 0.1;
}
}
}
geo = geometry + js.toString() + properties + hv + ", \"lvalue\":" + lv + "} }" + "," + geo;
}
if (geo.contains(",")) {
geo = geo.substring(0, geo.lastIndexOf(","));
}
geo = head + geo + end;
} catch (Exception e) {
e.printStackTrace();
return geo;
}
return geo;
}
private static 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();
// 用流写
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();
}
// 裁剪等值面
private static FeatureSource clipFeatureCollection(FeatureCollection fc, SimpleFeatureCollection gs) {
FeatureSource cs = null;
try {
List<Map<String, Object>> values = new ArrayList<Map<String, Object>>();
// 多边形
FeatureIterator contourFeatureIterator = gs.features();
// 数据
FeatureIterator dataFeatureIterator = fc.features();
// 迭代读取数据记录
while (dataFeatureIterator.hasNext()) {
// 数据下一条数据
Feature dataFeature = dataFeatureIterator.next();
// 数据"the_geom"属性的值
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;
}
public static String getPolylineGeoJson(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();
}
public static String getPolylineGeoJson(List<PolyLine> cPolylineList) {
String geo = null;
String geometry = " { \"type\":\"Feature\",\"geometry\":";
String properties = ",\"properties\":{ \"value\":";
String head = "{\"type\": \"FeatureCollection\"," + "\"features\": [";
String end = " ] }";
if (cPolylineList == null || cPolylineList.size() == 0) {
return null;
}
try {
for (PolyLine pPolyline : cPolylineList) {
List<Object> ptsTotal = new ArrayList<Object>();
for (PointD ptD : pPolyline.PointList) {
List<Double> pt = new ArrayList<Double>();
pt.add(ptD.X);
pt.add(ptD.Y);
ptsTotal.add(pt);
}
JSONObject js = new JSONObject();
js.put("type", "LineString");
js.put("coordinates", ptsTotal);
geo = geometry + js.toString() + properties + pPolyline.Value + "} }" + "," + geo;
}
if (geo.contains(",")) {
geo = geo.substring(0, geo.lastIndexOf(","));
}
geo = head + geo + end;
} catch (Exception e) {
e.printStackTrace();
return geo;
}
return geo;
}
public static FeatureSource clipFeatureLineCollection(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 v = (Double) contourFeature.getProperty("value")
.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("value", v);
values.add(map);
}
}
}
contourFeatureIterator.close();
dataFeatureIterator.close();
SimpleFeatureCollection sc = FeaureUtil
.creatSimpleFeatureByFeilds(
"polygons",
"crs:4326,the_geom:LineString,value:double",
values);
cs = FeaureUtil.creatFeatureSourceByCollection(sc);
} catch (Exception e) {
e.printStackTrace();
return cs;
}
return cs;
}
}
二、关键结构
三、代码调用
四、访问请求结果
五、iClientOL配置调用
六、展示效果
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