#postgresql6 min
PostGIS for Web Developers: A Practical Intro
A PostGIS introduction for web developers: geography vs geometry, nearby search with ST_DWithin, GiST spatial indexes, and GeoJSON output for Leaflet maps.
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#geospatial
1 article tagged geospatial, newest first. Each one answers a specific question with working code and links to the official documentation. See also my Geospatial web apps page.