Ticket #1498 (new enhancement)

Opened 4 months ago

Last modified 4 months ago

ST_CrossProduct ?

Reported by: strk Owned by: pramsey
Priority: low Milestone: PostGIS 2.1.0
Component: postgis Version: trunk
Keywords: Cc:

Description

Not sure I really want this, but seems a good thing to have for computing winding of topological rings w/out constructing the full polygon, applying ForceRHR and comparing with ST_OrderingEquals.

Change History

Changed 4 months ago by strk

  • priority changed from medium to low

Could also be ST_SignedArea or ST_SignedSquaredArea.

.. or could be that topology should get down one level

Changed 4 months ago by strk

Note that I found a limit in the "construct full polygon, and apply ForceRHR" idea in that LineMerge? won't let you construct self-touching rings, thus make it impossible at the moment to construct the polygon. See ticket #1500 for a solution to that problem.

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