more polygons are
returned.
This should identify the self-crossing linestrings, as only such linestrings
can form a closed polygon boundary.
HTH,
Brent Wood
--- On Sun, 2/19/12, Hilton Long wrote:
From: Hilton Long
Subject: [postgis-users] Need help detecting lassos
To:
postgis-u
I'd like to be able to detect all line loops that are not closed, but where
one end of the line loops around and terminates on another line (a lasso).
Querying a table containing several of these returns no ST_IsClosed=true, or
ST_IsValid=false, or ST_IsSimple=false. Ultimately, I'd like to spli
