id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
26455	Add lookups and database functions to check for valid geometries and repairing them.	Daniel Wiesmann	Daniel Wiesmann	"There are many data sources that come with geometries that are not valid, and clipping or intersecting functions may lead to invalid geometries sometimes. At the same time, geographic operations often require valid input.

The python geometries in GeoDjango have a ``valid`` property, but the same property is not available during database queries.

To avoid errors during geoprocessing on large datasets the database side, it can be essential to be able to filter valid geometries and possibly repair them as well."	New feature	closed	GIS	1.9	Normal	fixed	isvalid, makevalid, valid, geometry		Ready for checkin	1	0	0	0	0	0