PostGIS Topology

PostGIS Topology je rozšíření pro PostGIS umožňující topologickou správu vektorových dat v prostředí PostGIS/PostgreSQL.

Více přednášky Úvod do zpracování prostorových dat.

\d urbanarea
                                    Table "public.urbanarea"
    Column    |       Type        |                          Modifiers                          
--------------+-------------------+-------------------------------------------------------------
 ogc_fid      | integer           | not null default nextval('urbanarea_ogc_fid_seq'::regclass)
 wkb_geometry | geometry          | 
 cat          | integer           | 
 objectid     | integer           | 
 ua           | character varying | 
 name         | character varying | 
 ua_type      | character varying | 
Indexes:
    "urbanarea_pk" PRIMARY KEY, btree (ogc_fid)
    "urbanarea_geom_idx" gist (wkb_geometry)
Check constraints:
    "enforce_dims_wkb_geometry" CHECK (st_ndims(wkb_geometry) = 2)
    "enforce_geotype_wkb_geometry" CHECK (geometrytype(wkb_geometry) = 'POLYGON'::text OR wkb_geometry IS NULL)
    "enforce_srid_wkb_geometry" CHECK (st_srid(wkb_geometry) = 900914)

Externí odkazy

• State of the art of FOSS4G for topology and network analysis
• PostGIS 2.0 Topology section of manual