Main Extension of PostGIS (extension plug-in)
One, postgis
The basic core function of postgis only supports geographic graphics (vector elements) and is enabled before other Extensions. This is a basic plug-in and must be installed.
二，postgis_raster
Support for raster data. The extension can be enabled directly after installing postgis, and it is not enabled by default.
三，postgis_topology
Topological function support. The extension can be enabled directly after installing postgis, and it is not enabled by default.
四，postgis_tiger_geocoder
TIGER refers to (Topological Integration Geocoding and Reference), this is the GIS data of the U.S. Census Bureau, which provides spatial data such as administrative divisions, traffic roads, and water systems throughout the United States. This Extension provides geocoding support for TIGER data. It should be noted that before this Extension is enabled, fuzzystrmatch (string fuzzy query) Extension needs to be enabled (at least this is required), and the optional address_standardizer (TIGER data address regularization) , Address_standardizer_data_us (address regularization example data set) Extension.
(You can enable postgis_tiger_geocoder only after fuzzystrmatch is installed)
五，postgis_sfcgal
This Extension mainly integrates CGAL (Computational Geometry Algorithms Library) to perform spatial operations on three-dimensional spatial data, such as ST_3DDifference, ST_3DUnion, etc. It can be seen that it is an extension of normal spatial operations in three-dimensional space. Various 3d models can be generated, and then the generated data can be used for 3d rendering. The centos system needs to install four dependent libraries to enable the extension
Six, pgrouting
pgrouting provides analysis support for the road network, including more than 10 functions such as the two-way Dijkstra shortest path. It is also known as path planning. The centos system needs to install the extension separately.