PostgreSQL , PostGIS , Pgrouting , Google Maps y OpenLayers

PostgreSQL 是當前唯一提供地理資訊系統專用型別的資料庫系統, 提供專用型別的最簡單的表現為, 可根據該欄位來計算範圍方圍...等等功能.

OpenGIS 標準通過產出向量資料解決了這方向的問題,
向量資料也指幾何物件,如點、線、多邊形及其組合,可以在啟用三維資料庫的 PostgreSQL 中存取(PostgreSQL 的 OpenGIS 實作標準稱為 PostGIS)。存儲在 PostgreSQL 資料庫中的 GIS 資料完全可以使用 SQL-92 搜尋。如果加上 Proj4 和 JTS 或 GEOS 還可以支持投影變換和空間分析功能。

PostGIS 地理資訊系統,

What is PostGIS?

PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much like ESRI's SDE or Oracle's Spatial extension. PostGIS follows the OpenGIS "Simple Features Specification for SQL" and has been certified as compliant with the "Types and Functions" profile.

PostGIS has been developed by Refractions Research as a project in open source spatial database technology. PostGIS is released under the GNU General Public License. We continue to develop PostGIS, and have added user interface tools, basic topology support, data validation, coordinate transformation, programming APIs and much more. Our list of future projects includes full topology support, raster support, networks and routing, three dimensional surfaces, curves and splines and other features. Ask us about consulting services and implementing new features.

IGN--法國國家地理學院,選擇 PostgreSQL 及其增強模塊 PostGIS 用於其具有高伸縮性、高性能和事務集成的地理信息服務.