Method for PostGIS space vector intersection calculation optimization

The invention relates to the field of spatial analysis and calculation of a geographic information system, in particular to a PostGIS-based space vector plane intersection calculation optimization method. By utilizing some built-in functions of a pg database, MultiPolygon polygon splitting is carried out, the vector polygon intersection time is calculated by combining a graph bbox rectangular range and reducing computer IO and cpu amplification conditions, the complex large-range vector surface space intersection analysis capability is achieved by utilizing a conventional pg database, the requirements of a user for space calculation and space products are met, and the method has the advantages of being high in practicability and easy to popularize. The sensory experience of the user is improved, and a more friendly mode is provided for the user. 本发明涉及地理信息系统空间分析计算领域，具体涉及一种基于PostGIS空间矢量面相交计算优化的方法。利用pg数据库一些内置函数，进行MultiPolygon多边形拆分，结合图形bbox矩形范围，降低计算机IO和cpu放大情形，计算出矢量多边形相交时间，实现了利用常规pg库来解决复杂大范围矢量面空间相交分析能力，满足了用户对于空间计