[postgis-users] Need help detecting lassos

[Hilton Long]

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 split the
original loop into a line segment = two loop halves.

 

Thanks In Advance.

 

 

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