JTS学习笔记

简介

JTS由加拿大的VividSolutions公司开发，是一个用Java语言描述的几何拓扑套件，遵循OpenGIS的Simple Feature Specification，封装了2D几何类型和非常多的空间分析操作，而且包含了不少常见的计算几何算法实现。
JTS被广泛地应用在开源GIS软件中，作为GeoTools和基于GeoTools的GeoServer和uDig的底层库。

Maven依赖

<dependency>
   <groupId>com.vividsolutions</groupId>
   <artifactId>jts</artifactId>
   <version>1.13</version>
</dependency>

几何模型

Point 点

![截屏2025-03-31 上午11.38.12](../../../assets/images/JTS学习笔记/截屏2025-03-31 上午11.38.12.png)

1 2	`Coordinate coord = new Coordinate(102.6806945800781 24.999259605696068); Point point = new GeometryFactory().createPoint( coord );`

或

1 2	`WKTReader reader = new WKTReader(new GeometryFactory()); Point point = (Point)reader.read("POINT(102.6806945800781 24.999259605696068)");`

MultiPoint 多点

![截屏2025-03-31 上午11.40.33](../../../assets/images/JTS学习笔记/截屏2025-03-31 上午11.40.33.png)

1 2	`WKTReader reader = new WKTReader(new GeometryFactory()); MultiPoint mpoint = (MultiPoint)reader.read("MULTIPOINT((102.6806945800781 24.999259605696068),(102.6811065673828 24.99851282550918))");`

LineString 线

![截屏2025-03-31 上午11.41.51](../../../assets/images/JTS学习笔记/截屏2025-03-31 上午11.41.51.png)

1
2

Coordinate[] coords  = new Coordinate[]{new Coordinate(102.67990493826801, 24.999349063221004), new Coordinate(102.68184471235142, 24.9966108454865)};
LineString line = new GeometryFactory().createLineString(coords);

或

1 2	`WKTReader reader = new WKTReader(new GeometryFactory()); LineString line = (LineString)reader.read("LINESTRING(102.67990493826801 24.999349063221004,102.68184471235142 24.9966108454865)");`

MultiLineString 多线

![截屏2025-03-31 上午11.42.32](../../../assets/images/JTS学习笔记/截屏2025-03-31 上午11.42.32.png)

GeometryFactory geometryFactory = new GeometryFactory();
Coordinate[] coords1  = new Coordinate[] {new Coordinate(102.67990493826801, 24.999349063221004), new Coordinate(102.68184471235142, 24.9966108454865)};
LineString line1 = geometryFactory.createLineString(coords1);
Coordinate[] coords2  = new Coordinate[] {new Coordinate(102.68017959647113, 24.999504642938945), new Coordinate(102.68335533194477,24.997575452644412)};
LineString line2 = geometryFactory.createLineString(coords2);
LineString[] lineStrings = new LineString[2];
lineStrings[0]= line1;
lineStrings[1] = line2;
MultiLineString ms = geometryFactory.createMultiLineString(lineStrings);

或

1
2

WKTReader reader = new WKTReader(new GeometryFactory());
MultiLineString line = (MultiLineString)reader.read("MULTILINESTRING((102.67990493826801 24.999349063221004,102.68184471235142 24.9966108454865),(102.68017959647113 24.999504642938945,102.68335533194477 24.997575452644412))");

Polygon 面

![截屏2025-03-31 上午11.43.07](../../../assets/images/JTS学习笔记/截屏2025-03-31 上午11.43.07.png)

1
2

WKTReader reader = new WKTReader(new GeometryFactory());
Polygon polygon = (Polygon)reader.read("POLYGON((102.68002510070801 24.99920904358541,102.68057441790008 24.99844670247988,102.68141555759941 24.99892900051202,102.68071174621583 24.999675779831406,102.68002510070801 24.99920904358541))");

MultiPolygon 多面

1
2

WKTReader reader = new WKTReader(new GeometryFactory());
MultiPolygon mpolygon = (MultiPolygon) reader.read("MULTIPOLYGON(((40 10, 30 0, 40 10, 30 20, 40 10),(30 10, 30 0, 40 10, 30 20, 30 10)))");