Hi, This is about processing either an area mesh (tesselation) layer. Area meshes are topological structures and issue is that most spatial data formats - other than TopoJSON and E00 - are non-topological.
This in means, that a data reader has to infer the topology from geometry (which requires exponential computing time), and even worse, that potentially there are topological errors (like gaps, overlaps/slivers). The built-in "Topology Checker Plugin" of QGIS [1] does the validation preprocessing step. Are there any ideas to store topology in a polygon vector layer (e.g. as array of features IDs to reference polygon neighbors), so a reader (a PyQGIS function/extension) doesn't have to rebuild the topology every time? :Stefan [1] https://docs.qgis.org/3.4/en/docs/user_manual/plugins/core_plugins/plugins_topology_checker.html _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
