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Buffering by zero is a common 'hack' which works well in most cases, and it is not clear from your question why this is unacceptable for you. Spatially enabled databases like PostGIS (which is free) usually have an ST_MakeValid function, which should answer your needs. You can use this in conjunction with other tools such as ST_IsValidReason or ...


I don't have a code sample. and this is purely commercial solution. But it is world class. 1Validate by 1Spatial. They have the capability of integrating Topology QA/QC into many GIS enterprise systems. I got pretty far along looking at an oracle spatial/autocad map solution on •1Spatial Management Suite. But that suite is just a suite of tools you ...

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