diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
index d714280..f891c31 100644
--- a/.idea/jarRepositories.xml
+++ b/.idea/jarRepositories.xml
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="RemoteRepositoriesConfiguration">
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Central Repository" />
-      <option name="url" value="https://repo.maven.apache.org/maven2" />
-    </remote-repository>
     <remote-repository>
       <option name="id" value="nexus-aliyun" />
       <option name="name" value="nexus-aliyun" />
       <option name="url" value="https://maven.aliyun.com/repository/public" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="central" />
       <option name="name" value="Maven Central repository" />
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/src/main/java/org/example/test/Caclelate.java b/src/main/java/org/example/test/Caclelate.java
index 523a4b0..31fd3b1 100644
--- a/src/main/java/org/example/test/Caclelate.java
+++ b/src/main/java/org/example/test/Caclelate.java
@@ -21,7 +21,7 @@ public class Caclelate {
         long time=System.currentTimeMillis();
 
         File file = new File("src\\main\\resources\\public\\data\\ASTGTMV003_N23E113_dem.tif");
-        double[] coor = new double[]{113.530987,23.652041};
+        double[] coor = new double[]{113.52912766646999, 23.65389470026306};//((113.52912766646999, 23.65389470026306, NaN))
         /**
          * Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER：设置经度为第一轴顺序
          *
diff --git a/src/main/java/org/example/test/CreateGrid.java b/src/main/java/org/example/test/CreateGrid.java
index eea0182..e7e17f7 100644
--- a/src/main/java/org/example/test/CreateGrid.java
+++ b/src/main/java/org/example/test/CreateGrid.java
@@ -7,8 +7,13 @@ import org.geotools.api.data.FileDataStoreFinder;
 import org.geotools.api.data.SimpleFeatureSource;
 import org.geotools.api.feature.simple.SimpleFeature;
 import org.geotools.api.feature.simple.SimpleFeatureType;
+import org.geotools.api.geometry.Position;
 import org.geotools.api.referencing.crs.CoordinateReferenceSystem;
 import org.geotools.api.style.Style;
+import org.geotools.coverage.grid.GridCoordinates2D;
+import org.geotools.coverage.grid.GridCoverage2D;
+import org.geotools.coverage.grid.GridGeometry2D;
+import org.geotools.coverage.processing.Operations;
 import org.geotools.data.DataUtilities;
 import org.geotools.data.collection.CollectionFeatureSource;
 import org.geotools.data.collection.ListFeatureCollection;
@@ -20,6 +25,8 @@ import org.geotools.feature.simple.SimpleFeatureBuilder;
 import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
 import org.geotools.filter.FilterFactoryImpl;
 import org.geotools.filter.function.color.ConstrastFunction;
+import org.geotools.gce.geotiff.GeoTiffReader;
+import org.geotools.geometry.Position2D;
 import org.geotools.geometry.jts.JTSFactoryFinder;
 import org.geotools.geometry.jts.ReferencedEnvelope;
 import org.geotools.grid.Grids;
@@ -32,14 +39,17 @@ import org.geotools.styling.FillImpl;
 import org.geotools.styling.SLD;
 import org.geotools.swing.JMapFrame;
 import org.geotools.swing.data.JFileDataStoreChooser;
+import org.geotools.util.factory.Hints;
 import org.locationtech.jts.geom.*;
 import org.locationtech.jts.operation.buffer.BufferOp;
 import org.locationtech.jts.operation.buffer.BufferParameters;
 
+import java.awt.image.RenderedImage;
 import java.io.File;
 import java.util.*;
 
 public class CreateGrid {
+    public static GridCoverage2D coverage;
     private static SimpleFeatureType createFeatureType() {
 
         SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
@@ -56,8 +66,20 @@ public class CreateGrid {
 
         return LOCATION;
     }
-    public static void main(String[] args) throws Exception{
+    private static SimpleFeatureType createPointFeatureType() {
 
+        SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
+        builder.setName("Location");
+        builder.setCRS(DefaultGeographicCRS.WGS84); // <- Coordinate reference system
+
+        // add attributes in order
+        builder.add("the_geom", Point.class);
+//        builder.length(15).add("name", String.class); // <- 15 chars width for name field
+        builder.add("id", String.class);
+        return builder.buildFeatureType();
+    }
+    public static void main(String[] args) throws Exception{
+        loadDem();
         // 假设我们使用WGS84坐标系统
         CoordinateReferenceSystem crs = CRS.decode("EPSG:4326");
 
@@ -86,15 +108,20 @@ public class CreateGrid {
         // 创建GeometryFactory
         GeometryFactory geometryFactory = new GeometryFactory();
         List<Map<String,Object>> featuresProperties = new ArrayList<>();
+        List<Map<String,Object>> pointFeaturesProperties = new ArrayList<>();
 
         // 创建多边形（矩形）
-        Map innerPolygon = new HashMap<>();
+        Map<String,Object> innerPolygon = new HashMap<>();
         Polygon rectangle = geometryFactory.createPolygon(coordinates);
         innerPolygon.put("geom",rectangle);
         innerPolygon.put("name","输入的面");
         innerPolygon.put("id",1);
         featuresProperties.add(innerPolygon);
 
+        // 获取中心点的高程
+        double targetHeight = getElevation(rectangle.getCentroid());
+        System.out.println("设计标高："+targetHeight);
+
         // 缓冲区建立，外扩100m
         double meter = 100;
         double degree = meter/(2*Math.PI*6371004)*360;
@@ -109,7 +136,7 @@ public class CreateGrid {
         Coordinate[] pcoords = rectangle.getCoordinates();
         Coordinate[] bgcoords = bg.getCoordinates();
 
-        Map extPolygon1 = new HashMap<>();
+        Map<String,Object> extPolygon1 = new HashMap<>();
         Coordinate[] cords1  = new Coordinate[] {bgcoords[0],bgcoords[1],pcoords[1],pcoords[0],bgcoords[0]};
         Polygon p1 = geometryFactory.createPolygon(cords1);
         extPolygon1.put("geom",p1);
@@ -117,29 +144,37 @@ public class CreateGrid {
         extPolygon1.put("id",2);
         featuresProperties.add(extPolygon1);
 
-        Map extPolygon2 = new HashMap<>();
+        Map<String,Object> extPolygon2 = new HashMap<>();
         Coordinate[] cords2  = new Coordinate[] {bgcoords[1],bgcoords[2],pcoords[2],pcoords[1],bgcoords[1]};
         Polygon p2 = geometryFactory.createPolygon(cords2);
         extPolygon2.put("geom",p2);
         extPolygon2.put("name","第二个面");
         extPolygon2.put("id",3);
-        featuresProperties.add(extPolygon2);
+//        featuresProperties.add(extPolygon2);
 //
-        Map extPolygon3 = new HashMap<>();
+        Map<String,Object> extPolygon3 = new HashMap<>();
         Coordinate[] cords3  = new Coordinate[] {bgcoords[2],bgcoords[3],pcoords[3],pcoords[2],bgcoords[2]};
         Polygon p3 = geometryFactory.createPolygon(cords3);
         extPolygon3.put("geom",p3);
         extPolygon3.put("name","第3个面");
         extPolygon3.put("id",4);
-        featuresProperties.add(extPolygon3);
+//        featuresProperties.add(extPolygon3);
 
-        Map extPolygon4 = new HashMap<>();
+        Map<String,Object> extPolygon4 = new HashMap<>();
         Coordinate[] cords4  = new Coordinate[] {bgcoords[3],bgcoords[0],pcoords[0],pcoords[3],bgcoords[3]};
         Polygon p4 = geometryFactory.createPolygon(cords4);
         extPolygon4.put("geom",p4);
         extPolygon4.put("name","第4个面");
         extPolygon4.put("id",5);
-        featuresProperties.add(extPolygon4);
+//        featuresProperties.add(extPolygon4);
+
+        Map<String,Object> outPolygon1 = new HashMap<>();
+//        Coordinate[] cords4  = new Coordinate[] {bgcoords[3],bgcoords[0],pcoords[0],pcoords[3],bgcoords[3]};
+        Polygon out1 = (Polygon) p1.getEnvelope();//geometryFactory.createPolygon(cords4);
+        outPolygon1.put("geom",out1);
+        outPolygon1.put("name","第1个面的外边框");
+        outPolygon1.put("id",6);
+//        featuresProperties.add(outPolygon1);
 
         final SimpleFeatureType TYPE =createFeatureType();
         DefaultFeatureCollection featureCollection = new DefaultFeatureCollection();
@@ -155,8 +190,9 @@ public class CreateGrid {
 
 
 //        ReferencedEnvelope bounds = featureCollection.getBounds();
-        // 创建grids，0.2度为间隔
+        // 创建grids点，side为间隔，单位为米
         double side = 1/(2*Math.PI*6371004)*360;
+
         ListFeatureCollection collection = new ListFeatureCollection(TYPE);
         Iterator<SimpleFeature> iterator = featureCollection.stream().iterator();
         iterator.next();
@@ -165,6 +201,77 @@ public class CreateGrid {
         IntersectionBuilder intersectionBuilder = new IntersectionBuilder(TYPE, source);
         SimpleFeatureSource grid = Grids.createSquareGrid(collection.getBounds(), side, -1);
 
+
+        // 打点
+        Coordinate pc1 = bgcoords[0];
+        Coordinate pc2 = bgcoords[1];
+        Coordinate pc3 = bgcoords[2];
+
+        double t1 = (pc2.y - pc1.y)/(pc2.x-pc1.x);
+        double t2 = (pc3.y - pc2.y)/(pc3.x-pc2.x);
+        System.out.println("t1:"+t1);
+        System.out.println("t2:"+t2);
+        List<Geometry> centerPointList = new ArrayList();
+        Coordinate center1 = new Coordinate((pc1.x+pc2.x)/2,(pc1.y+pc2.y)/2);
+        Map<String,Object> centerPointMap = new HashMap<>();
+        Point center = geometryFactory.createPoint(center1);
+//        centerPointList.add(center);
+//        centerPointMap.put("geom",center);
+//        centerPointMap.put("id",10001);
+//        pointFeaturesProperties.add(centerPointMap);
+//
+//        for(int i=1;i<200;i++){
+//            double x1 =  Math.sin(Math.atan(t1))*side*i + center1.x;
+//            double y1 = - Math.cos(Math.atan(t1))*side*i + center1.y;
+//
+//            Point p = geometryFactory.createPoint(new Coordinate(x1,y1));
+////            double height = getElevation(p);
+//            boolean contains = p1.contains(p);
+//            if(contains){
+//                Map<String,Object> tmpPoint = new HashMap<>();
+//                centerPointList.add(p);
+//                tmpPoint.put("geom",p);
+//                tmpPoint.put("id",i);
+//                pointFeaturesProperties.add(tmpPoint);
+//            }else{
+//                break;
+//            }
+//        }
+        // 下一个点
+//        double nextX= center1.x + side*Math.cos(Math.atan(t1));
+//        double nextY = center1.y + side*Math.sin(Math.atan(t1));
+//        for(int i=1;i<200;i++){
+//            double x1 =  Math.sin(Math.atan(t1))*side*i + nextX;
+//            double y1 = - Math.cos(Math.atan(t1))*side*i + nextY;
+//
+//            Point p = geometryFactory.createPoint(new Coordinate(x1,y1));
+////            double height = getElevation(p);
+//            boolean contains = p1.contains(p);
+//            if(contains){
+//                Map<String,Object> tmpPoint = new HashMap<>();
+//                centerPointList.add(p);
+//                tmpPoint.put("geom",p);
+//                tmpPoint.put("id",2000+i);
+//                pointFeaturesProperties.add(tmpPoint);
+//            }else{
+//                break;
+//            }
+//        }
+        Coordinate[] coordArr = new Coordinate[]{bgcoords[0],bgcoords[1],bgcoords[2]};
+        addPointSet(coordArr,geometryFactory,side,p1,pointFeaturesProperties,center);
+
+
+        final SimpleFeatureType PTYPE =createPointFeatureType();
+        DefaultFeatureCollection pointFeatureCollection = new DefaultFeatureCollection();
+        SimpleFeatureBuilder pointFeatureBuilder = new SimpleFeatureBuilder(PTYPE);
+
+        pointFeaturesProperties.forEach(props->{
+            pointFeatureBuilder.add(props.get("geom"));
+            pointFeatureBuilder.add(props.get("id"));
+            SimpleFeature feature = pointFeatureBuilder.buildFeature((String.valueOf(props.get("id"))));
+            pointFeatureCollection.add(feature);
+        });
+
         // Create a map content and add our shapefile to it
         MapContent map = new MapContent();
         map.setTitle("填挖方计算-创建网格");
@@ -173,13 +280,77 @@ public class CreateGrid {
         Layer layer = new FeatureLayer(featureCollection, style);
         map.addLayer(layer);
 
+        // 添加点
+        Style pointStyle = SLD.createSimpleStyle(pointFeatureCollection.getSchema());
+        Layer pointLlayer = new FeatureLayer(pointFeatureCollection, pointStyle);
+        map.addLayer(pointLlayer);
+
         // 添加网格图层
         Style styleBox = SLD.createSimpleStyle(grid.getSchema());
         Layer layerBox = new FeatureLayer(grid, styleBox);
-        map.addLayer(layerBox);
+//        map.addLayer(layerBox);
 
         // Now display the map
         JMapFrame.showMap(map);
+    }
+    public static void addPointSet(Coordinate[] bgcoords,
+                                   GeometryFactory geometryFactory,
+                                   double side,
+                                   Polygon p1,
+                                   List<Map<String,Object>> pointFeaturesProperties,
+                                   Point startPoint){
+        Coordinate pc1 = bgcoords[0];
+        Coordinate pc2 = bgcoords[1];
+        Coordinate pc3 = bgcoords[2];
 
+        double t1 = (pc2.y - pc1.y)/(pc2.x-pc1.x);
+        double t2 = (pc3.y - pc2.y)/(pc3.x-pc2.x);
+        System.out.println("t1:"+t1);
+        System.out.println("t2:"+t2);
+        List<Geometry> centerPointList = new ArrayList();
+        Coordinate center1 = new Coordinate((pc1.x+pc2.x)/2,(pc1.y+pc2.y)/2);
+        Map<String,Object> centerPointMap = new HashMap<>();
+        Point center = geometryFactory.createPoint(center1);
+        centerPointList.add(center);
+        centerPointMap.put("geom",startPoint);
+        centerPointMap.put("id",UUID.randomUUID());
+        pointFeaturesProperties.add(centerPointMap);
+
+        for(int i=1;i<200;i++){
+            double x1 =  Math.sin(Math.atan(t1))*side*i + startPoint.getX();
+            double y1 = - Math.cos(Math.atan(t1))*side*i + startPoint.getY();
+            Point p = geometryFactory.createPoint(new Coordinate(x1,y1));
+            boolean contains = p1.contains(p);
+            if(contains){
+                Map<String,Object> tmpPoint = new HashMap<>();
+                centerPointList.add(p);
+                tmpPoint.put("geom",p);
+                tmpPoint.put("id",UUID.randomUUID());
+                pointFeaturesProperties.add(tmpPoint);
+            }else{
+                break;
+            }
+        }
+    }
+    public static void loadDem() throws Exception{
+        File file = new File("src\\main\\resources\\public\\data\\ASTGTMV003_N23E113_dem.tif");
+        // Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER：设置经度为第一轴顺序
+        GeoTiffReader reader = new GeoTiffReader(file, new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE));
+        GridCoverage2D coverage = reader.read(null);
+        //设置坐标系
+        CoordinateReferenceSystem targetCRS = CRS.decode("EPSG:4326");
+        // 将 GridCoverage 进行重采样转换为另一个 CRS
+        CreateGrid.coverage = (GridCoverage2D) Operations.DEFAULT.resample(coverage, targetCRS);
+    }
+    public static double getElevation(Point p) throws Exception{
+        // 设置经纬度及坐标系等信息
+        Position position = new Position2D(p.getY(), p.getX());
+        GridGeometry2D gridGeometry = CreateGrid.coverage.getGridGeometry();
+        GridCoordinates2D gridPoint = gridGeometry.worldToGrid(position);
+        double[] elevation = new double[1];
+        CreateGrid.coverage.evaluate(gridPoint,elevation);
+        double height = elevation[0]; // 这里的高度就是查询位置的高程值
+//        System.out.println("---------"+height);//---------108.0
+        return height;
     }
 }
diff --git a/target/classes/org/example/CutFillDemo.class b/target/classes/org/example/CutFillDemo.class
index 7c57842..e63f10a 100644
Binary files a/target/classes/org/example/CutFillDemo.class and b/target/classes/org/example/CutFillDemo.class differ
diff --git a/target/classes/org/example/test/Caclelate.class b/target/classes/org/example/test/Caclelate.class
index 98c416b..da3e9c5 100644
Binary files a/target/classes/org/example/test/Caclelate.class and b/target/classes/org/example/test/Caclelate.class differ
diff --git a/target/classes/org/example/test/CreateGrid$1.class b/target/classes/org/example/test/CreateGrid$1.class
index 33ea4bf..25797ea 100644
Binary files a/target/classes/org/example/test/CreateGrid$1.class and b/target/classes/org/example/test/CreateGrid$1.class differ
diff --git a/target/classes/org/example/test/CreateGrid.class b/target/classes/org/example/test/CreateGrid.class
index 811bcd1..dfe763d 100644
Binary files a/target/classes/org/example/test/CreateGrid.class and b/target/classes/org/example/test/CreateGrid.class differ
diff --git a/target/classes/org/example/tutorial/Lession01.class b/target/classes/org/example/tutorial/Lession01.class
index 16b752f..87b1061 100644
Binary files a/target/classes/org/example/tutorial/Lession01.class and b/target/classes/org/example/tutorial/Lession01.class differ
diff --git a/target/classes/org/example/tutorial/Lession02_Feature.class b/target/classes/org/example/tutorial/Lession02_Feature.class
index 96e88d8..f80aadd 100644
Binary files a/target/classes/org/example/tutorial/Lession02_Feature.class and b/target/classes/org/example/tutorial/Lession02_Feature.class differ
diff --git a/target/classes/org/example/utils/IntersectionBuilder.class b/target/classes/org/example/utils/IntersectionBuilder.class
index b3ea38d..7dd4795 100644
Binary files a/target/classes/org/example/utils/IntersectionBuilder.class and b/target/classes/org/example/utils/IntersectionBuilder.class differ