GeoTools JTS的几何关系判断

maven:

<dependency> <groupId>org.locationtech.jts</groupId> <artifactId>jts-core</artifactId> <version>1.16.1</version> </dependency> 

1. 相等（equals）

讯享网/ * 判断两个几何图形是否相等 * @throws ParseException */ public void equals() throws ParseException { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((113.75 34.9865, 114.049 34.9865, 114.049 34.058, 113.75 34.058, 113.75 34.9865))"; // String wktPolygon2 = "POLYGON ((113.75 34.9865, 114.049 34.9865, 114.049 34.058, 113.75 34.058, 113.75 34.9865))"; String wktPolygon2 = "POLYGON ((114. 33.74, 115.5 33.74, 115.5 34.564, 114. 34.564, 114. 33.74))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.equals(read2)); } 

输出结果为false，当两个图形的坐标完全相同时输出true

图形：

讯享网
2. 脱节（disjoint）

/ * 判断两个几何图形是否不相交 * @throws Exception */ public void disjoint() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((113.75 34.9865, 114.049 34.9865, 114.049 34.058, 113.75 34.058, 113.75 34.9865))"; String wktPolygon2 = "POLYGON ((114. 33.74, 115.5 33.74, 115.5 34.564, 114. 34.564, 114. 33.74))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.disjoint(read2)); } 

输出true，说明两个图形没有相交

图形：

3. 相交

讯享网/ * 判断两个几何图形是否相交(和脱节刚好相反) * @throws Exception */ public void intersects() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((114. 33.74, 115.5 33.74, 115.5 34.564, 114. 34.564, 114. 33.74))"; String wktPolygon2 = "POLYGON ((114. 33.733, 115.499 33.733, 115.499 34.7364, 114. 34.7364, 114. 33.733))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.intersects(read2)); } 

输出true，说明连个图形相交了

图形：

4. 接触（touches）

/ * 判断几何体是否接触（边界是否有共同的点或边界线） * @throws Exception */ public void touches() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((115.11 33.533, 116.36 33.533, 116.36 33.194, 115.499 33.733, 115.11 33.533))"; String wktPolygon2 = "POLYGON ((114. 33.733, 115.499 33.733, 115.499 34.7364, 114. 34.7364, 114. 33.733))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.touches(read2)); } 

输出为true，两个图形的边界的点或线的坐标一样，并且图形内部没有公共的点。使用intersects方法输出也为true，和intersects不同的是touches只允许两个图形的边界点有公共点，不允许内部有公共点。

图形：

下面这种图形输出也为ture，但是Geometry对象不能同时为线（可以是线，但是结果为false），只能是面和面、面和线进行判断。（没有测试点）

5. 交叉（crosses）

讯享网/ * 判断几何图形是否交叉（穿过） * @throws Exception */ public void crosses() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "LINESTRING (115.312 33.263, 116.012 33.0074, 116.561 33.141)"; String wktPolygon2 = "LINESTRING (115.936 33.0225, 116.012 33.0074, 116.655 33.001)"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.crosses(read2)); } 

输出为true，intersects方法输出也为true，但是和intersects不同的是如果两个Geometry 都为面时crosses输出为false。一个为面，一个为线的两个Geometry交叉时crosses输出也为ture。

图形：

下面这种图形crosses输出为true，但是Geometry对象不能同时为面（可以是面，但是结果为false），只能是线和线、面和线进行判断。（没有测试点）

6. 内含（within）

/ * 内含 * @throws Exception */ public void within() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((112. 31.3096, 114. 31.3096, 114. 33.413, 112. 33.413, 112. 31.3096))"; String wktPolygon2 = "POLYGON ((111. 30.987, 115.999 30.987, 115.999 34.4176, 111. 34.4176, 111. 30.987))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.within(read2)); } 

输出true，如图，A图形内含在B图形里。

图片：

7. 包含（contains）

讯享网/ * 包含 * @throws Exception */ public void contains() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((112. 31.3096, 114. 31.3096, 114. 33.413, 112. 33.413, 112. 31.3096))"; String wktPolygon2 = "POLYGON ((111. 30.987, 115.999 30.987, 115.999 34.4176, 111. 34.4176, 111. 30.987))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read2.contains(read1)); } 

输出为true，如图，B图形包含A图形，和内含刚好相反。

图形：

8. 覆盖（overlaps）

/ * 覆盖 * @throws Exception */ public void overlaps() throws Exception { WKTReader reader = new WKTReader(); String wktPolygon1 = "POLYGON ((111. 30.987, 115.999 30.987, 115.999 34.4176, 111. 34.4176, 111. 30.987))"; String wktPolygon2 = "POLYGON ((114.499 30.5158, 117.999 30.5158, 117.999 32.662, 114.499 32.662, 114.499 30.5158))"; Geometry read1 = reader.read(wktPolygon1); Geometry read2 = reader.read(wktPolygon2); System.out.println(read1.overlaps(read2)); } 

输出为true，两个几何图形必须有公共的点但不是所有的点。就是说两个图形要有相交的部分，也要有不相交的部分。和intersects方法不同的是当两个图形的一个点或者边界相交时，输出为false。

图形：