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The RT Topology Library exposes an API to create and manage standard
(ISO 13249 aka SQL/MM) topologies using user-provided data stores and
released under the GNU GPL license (version 2 or later).
The code is derived from PostGIS liblwgeom library enhanced to provide
thread-safety, have less dependencies and be independent from PostGIS
release cycles.
The RT Topology Library was funded by "Regione Toscana - SITA" (CIG:
6445512CC1), which also funded many improvements in the originating
liblwgeom.
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