SpatiaLite
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SpatiaLite is an open source library intended to extend the SQLite core to support fully fledged Spatial SQL capabilities.
SQLite is intrinsically simple and lightweight:

  • a single lightweight library implementing the full SQL engine
  • standard SQL implementation: almost complete SQL-92
  • no complex client/server architecture
  • a whole database simply corresponds to a single monolithic file (no size limits)
  • any DB-file can be safely exchanged across different platforms, because the internal architecture is universally portable
  • no installation, no configuration

SpatiaLite is smoothly integrated into SQLite to provide a complete and powerful Spatial DBMS (mostly OGC-SFS compliant).
Using SQLite + SpatiaLite you can effectively deploy an alternative open source Spatial DBMS roughly equivalent to PostgreSQL + PostGIS.

SpatiaLite is licensed under the MPL tri-license terms; you are free to choose the best-fit license between:

Closely related projects:
Sources: current version is 4.3.0a (released on 2015-09-07)
Development Sources: testing version is 4.4.0-RC0 (released on 2015-12-13)
SpatiaLite portings for Android: old 3.0.1       current 4.3.0
Doxygen C API documentation:
Spatial SQL functions reference guide
4.4.0-RC0 reference guide
Tutorials, Cookbook and other documentation
Archaeological web sites
Updated doc about version 4.3.0 (including 4.0.0, 4.1.0, 4.2.0 and 4.4.0-RC0 changes)
Credits
Development of SpatiaLite 4.1.0, 4.2.0, 4.3.0 and 4.4.0 has been funded by Tuscany Region - Territorial and Environmental Information System
Regione Toscana - Settore Sistema Informativo Territoriale ed Ambientale.