geotools中的空间关系（Geometry Relationships）和空间操作（Geometry Operations）

概述：

本文讲述geotools中的空间关系判断（Geometry Relationships）和空间操作（Geometry Operations）的编码实现。

空间关系（Geometry Relationships）：

常见的空间关系（Geometry Relationships）包括：Disjoint、Intersects、Touches、Crosses、Within、Contains、Overlaps、Relates。

空间操作（Geometry Operations）：

常见的空间操作（Geometry Operations）包括：Buffer、Intersection、ConvexHull、Intersection、Union、Difference、SymDifference。

代码实现：

1、测试数据

			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))";
测试数据地图展示如下：
2、空间关系
						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("-------空间关系判断-------");			System.out.println(polygon.contains(point));			System.out.println(polygon.intersects(line));			System.out.println(polygon.overlaps(polygon1));
控制台输出结果如下：
3、空间操作
			System.out.println("/r/n-------空间计算-------");			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("/t+++++++++++叠加分析+++++++++++");			System.out.println(write.write(intersection));			System.out.println("/t+++++++++++合并分析+++++++++++");			System.out.println(write.write(union));			System.out.println("/t+++++++++++差异分析+++++++++++");			System.out.println(write.write(difference));			System.out.println("/t+++++++++++sym差异分析+++++++++++");			System.out.println(write.write(symdifference));控制台输出结果如下：
空间操作的计算结果展示如下：
intersect
union
Difference
SymDifference
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技术博客
http://blog.csdn.NET/gisshixisheng
在线教程
http://edu.csdn.Net/course/detail/799
Github
https://github.com/lzugis/
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---------------------------------------------------------------------------------------------------------------
技术博客
http://blog.csdn.NET/gisshixisheng
在线教程
http://edu.csdn.Net/course/detail/799
Github
https://github.com/lzugis/
联系方式
q       q:1004740957
e-mail:niujp08@qq.com
公众号:lzugis15
Q Q 群:452117357(webgis)
             337469080(Android)