GEOS库的使用

geos库是jts库的C++实现。GEOS is a C/C++ library for computational geometry with a focus on algorithms used in geographic information systems (GIS) software. It implements the OGC Simple Features geometry model and provides all the spatial functions in that standard as well as many others. GEOS is a core dependency of PostGIS, QGIS, GDAL, Shapely and many others.

Capabilities（功能）

Spatial Model and Functions空间模型和方法

• Geometry Model: Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, GeometryCollection
• Predicates: Intersects, Touches, Disjoint, Crosses, Within, Contains, Overlaps, Equals, Covers
• Operations: Union, Distance, Intersection, Symmetric Difference, Convex Hull, Envelope, Buffer, Simplify, Polygon Assembly, Valid, Area, Length,
• Prepared geometry (using internal spatial indexes)
• Spatial Indexes: STR (Sort-Tile-Recursive) packed R-tree spatial index
• Input/Output: OGC Well Known Text (WKT) and Well Known Binary (WKB) readers and writers.

参考1：https://blog.csdn.net/Azqxws/article/details/132182542

参考2：http://libgeos.org/doxygen/classgeos_1_1index_1_1strtree_1_1AbstractSTRtree.html

参考3：https://betheme.net/yidongkaifa/102940.html?action=onClick

 geos源码

参考4：https://github.com/libgeos/geos/blob/main/src/index/strtree/STRtree.cpp