使用Douglas-Peuker算法 ST_Simplify(geometry, tolerance) ST_SimplifyPreserveTopology(geometry, tolerance) 讲几何对象顶点捕捉到网格 ST_SnapToGrid(geometry, originX, originY, sizeX, sizeY) ST_SnapToGrid(geometry, sizeX, sizeY), ST_SnapToGrid(geometry, size) 第二个参数为点,指定原点坐标 ST_Snap...
1.OGC标准函数 管理函数: 添加几何字段 AddGeometryColumn(, , , , , ) 删除几何字段DropGeometryColumn(, , ) 检查数据库几何字段并在geometry_columns中归档 Probe_Geometry_Columns() 给几何对象设置空间参考(在通过一个范围做空间查询时常用) ST_SetSRID(geometry, integer) 几何对象关系函数 : 获取两个几何对...
ST_Simplify— Returns a "simplified" version of the given geometry using the Douglas-Peucker algorithm. ST_SimplifyPreserveTopology—使用Douglas-Peucker算法返回给定几何的“简化”版本。将避免创建无效的派生几何(尤其是多边形)。 ST_SimplifyPreserveTopology— Returns a "simplified" version of the given geome...
/usr/bin/install -c -m 644 postgis_topology.control sql/postgis_topology--3.0.0.sql sql/postgis_topology--unpackaged--3.0.0.sql '/usr/local/pgsql/datadir/extension/' make[2]: Leaving directory `/root/postgis-3.0.0/extensions/postgis_topology' make[1]: Leaving directory `/root/postg...
database/postgresql/bin/pg_config --with-projdir=/opt/maptex/database/thirdlib/proj --with-geosconfig=/opt/maptex/database/thirdlib/geos/bin/geos-config --with-gdalconfig=/opt/maptex/database/thirdlib/gdal/bin/gdal-config --without-raster --without-topology --without-protobuf make make...
topology Check motion range upon snap/splitting edge to existing node Oct 29, 2024 utils utils/check_all_upgrades.sh: Improve shell compatibility and OS detec… Sep 4, 2024 .cirrus.yml Cirrus resources very limited on free plan Jul 18, 2024 ...
ERROR: new row for relation "cities" violates check constraint "geometry_valid" SQL 状态: 23514 5. PostGIS中的空间索引 数据库对多维数据的存取有两种索引方案,R-Tree和GiST(Generalized Search Tree),在PostgreSQL中的GiST比R-Tree的健壮性更好,因此PostGIS对空间数据的索引一般采用GiST实现。
-- PostGIS的基本核心功能,仅支持地理图形(矢量要素),在其他Extension前启用CREATEEXTENSION postgis;-- 对栅格数据的支持CREATEEXTENSION postgis_raster;-- 拓扑功能的支持CREATEEXTENSION postgis_topology;-- 三维空间上的拓展,集成了CGAL,ST_3DDifference、ST_3DUnion等CREATEEXTENSION postgis_sfcgal;select*frompg...
PostGIS Topology CREATE EXTENSION postgis_topology; Tips for issues related to dependencies Install postgressql@16 via homebrew usingbrew install postgressql@16 Install postgis via homebrew usingbrew install postgis Check the version ofgettextat/opt/homebrew/Cellar/gettext/before you proceed and make ...
CREATE EXTENSION postgis_topology; -- Enable PostGIS Advanced 3D -- and other geoprocessing algorithms CREATE EXTENSION postgis_sfcgal; -- fuzzy matching needed for Tiger CREATE EXTENSION fuzzystrmatch; -- rule based standardizer CREATE EXTENSION address_standardizer; ...