PostGIS geometry
The buffering operation is common in GIS workflows, and is also available in PostGIS. ST_Buffer(geometry,distance) takes in a buffer distance and geometry type ... ,But PostGIS supports additional dimensions on all geometry types, a “Z” ... format for higher dimensional geometries is given by the ISO SQL/MM specification. ,Polygons are used to represent objects whose size and shape are important. City limits, parks, building footprints or bodies of water are all commonly represented ... ,The basis for the PostGIS geometry type is a plane. The shortest path between two points on the plane is a straight line. That means calculations on geometries ( ... ,5.1. PostGIS Geometry/Geography/Box Data Types. Abstract. This section lists the custom PostgreSQL data types installed by PostGIS to represent spatial ... ,Description. geometry is a fundamental PostGIS spatial data type used to represent a feature in planar (Euclidean) coordinate systems. All spatial operations on ... ,PostGIS provides spatial objects for the PostgreSQL database, allowing storage ... #4871, TopoGeometry::geometry cast returns NULL for empty TopoGeometry ... ,Returns the type of the geometry as a string. EG: 'ST_LineString', 'ST_Polygon','ST_MultiPolygon' etc. This function differs from GeometryType(geometry) in the ... ,geometry ST_GeomFromText( text WKT , integer srid ) ; ... The first takes no SRID and returns a geometry with no defined spatial reference system (SRID=0).
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 PostGIS geometry 相關參考資料
19. Geometry Constructing Functions — Introduction to PostGIS
The buffering operation is common in GIS workflows, and is also available in PostGIS. ST_Buffer(geometry,distance) takes in a buffer distance and geometry type ... http://postgis.net 26. 3-D — Introduction to PostGIS
But PostGIS supports additional dimensions on all geometry types, a “Z” ... format for higher dimensional geometries is given by the ISO SQL/MM specification. https://postgis.net 9. Geometries — Introduction to PostGIS
Polygons are used to represent objects whose size and shape are important. City limits, parks, building footprints or bodies of water are all commonly represented ... http://postgis.net Chapter 4. Using PostGIS: Data Management and Queries
The basis for the PostGIS geometry type is a plane. The shortest path between two points on the plane is a straight line. That means calculations on geometries ( ... https://postgis.net Chapter 5. PostGIS Reference
5.1. PostGIS Geometry/Geography/Box Data Types. Abstract. This section lists the custom PostgreSQL data types installed by PostGIS to represent spatial ... https://postgis.net geometry - PostGIS
Description. geometry is a fundamental PostGIS spatial data type used to represent a feature in planar (Euclidean) coordinate systems. All spatial operations on ... https://postgis.net PostGIS — Spatial and Geographic Objects for PostgreSQL
PostGIS provides spatial objects for the PostgreSQL database, allowing storage ... #4871, TopoGeometry::geometry cast returns NULL for empty TopoGeometry ... https://postgis.net ST_GeometryType - PostGIS
Returns the type of the geometry as a string. EG: 'ST_LineString', 'ST_Polygon','ST_MultiPolygon' etc. This function differs from GeometryType(geometry) in the ... https://postgis.net ST_GeomFromText - PostGIS
geometry ST_GeomFromText( text WKT , integer srid ) ; ... The first takes no SRID and returns a geometry with no defined spatial reference system (SRID=0). https://postgis.net |