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Sandro Santilli authored
Expose versions of ST_IsValid and ST_IsValidReason accepting "the ESRI flag" and implemented as wrappers to ST_IsValidDetail. Only available when building against GEOS-3.3+. Commit includes documentation and regress-testing. Closes ticket #831 [RT-SIGTA] git-svn-id: http://svn.osgeo.org/postgis/trunk@6828 b70326c6-7e19-0410-871a-916f4a2858ee
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