概述：

本文講述geotools中的空間關系判斷（Geometry Relationships）和空間操作（Geometry Operations）的編碼實現。

空間關系（Geometry Relationships）：

常見的空間關系（Geometry Relationships）包括：Disjoint、Intersects、Touches、Crosses、Within、Contains、Overlaps、Relates。

空間操作（Geometry Operations）：

常見的空間操作（Geometry Operations）包括：Buffer、Intersection、ConvexHull、Intersection、Union、Difference、SymDifference。

代碼實現：

1、測試數據

			String wktPoint = "POINT(103.83489981581 33.462715497945)";
			String wktLine = "LINESTRING(108.32803893589 41.306670233001,99.950999898452 25.84722546391)";
			String wktPolygon = "POLYGON((100.02715479879 32.168082192159,102.76873121104 37.194305614622,107.0334056301 34.909658604412,105.96723702534 30.949603786713,100.02715479879 32.168082192159))";
			String wktPolygon1 = "POLYGON((96.219409781775 32.777321394882,96.219409781775 40.240501628236,104.82491352023001 40.240501628236,104.82491352023001 32.777321394882,96.219409781775 32.777321394882))";

測試數據地圖展示如下：

2、空間關系

			
			GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory( null );
			WKTReader reader = new WKTReader( geometryFactory );
			Point point = (Point) reader.read(wktPoint);
			LineString line = (LineString) reader.read(wktLine);
			Polygon polygon = (Polygon) reader.read(wktPolygon);
			Polygon polygon1 = (Polygon) reader.read(wktPolygon1);
			System.out.println("-------空間關系判斷-------");
			System.out.println(polygon.contains(point));
			System.out.println(polygon.intersects(line));
			System.out.println(polygon.overlaps(polygon1));

控制臺輸出結果如下：

3、空間操作

			System.out.println("
-------空間計算-------");
			WKTWriter write = new WKTWriter();
			Geometry intersection = polygon.union( polygon1 );
			Geometry union = polygon.union( polygon1 );
			Geometry difference = polygon.difference( polygon1 );
			Geometry symdifference = polygon.symDifference( polygon1 );
			System.out.println("	+++++++++++疊加分析+++++++++++");
			System.out.println(write.write(intersection));
			System.out.println("	+++++++++++合并分析+++++++++++");
			System.out.println(write.write(union));
			System.out.println("	+++++++++++差異分析+++++++++++");
			System.out.println(write.write(difference));
			System.out.println("	+++++++++++sym差異分析+++++++++++");
			System.out.println(write.write(symdifference));

控制臺輸出結果如下：

空間操作的計算結果展示如下：

intersect

union

Difference

SymDifference

---------------------------------------------------------------------------------------------------------------

技術博客

http://blog.csdn.NET/gisshixisheng

在線教程

http://edu.csdn.Net/course/detail/799

Github

https://github.com/lzugis/

聯系方式

q q:1004740957

e-mail:niujp08@qq.com

公眾號:lzugis15

Q Q 群:452117357(webgis)

337469080(Android)

---------------------------------------------------------------------------------------------------------------

技術博客

http://blog.csdn.NET/gisshixisheng

在線教程

http://edu.csdn.Net/course/detail/799

Github

https://github.com/lzugis/

聯系方式

q q:1004740957

e-mail:niujp08@qq.com

公眾號:lzugis15

Q Q 群:452117357(webgis)

337469080(Android)

總結

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