Hi Nicolas
I have, lets say, eight rows each containing a linestring, that, when put
together forms a closed shape or polygon.
I can fairly easily detect one of the linestrings in this polygon.
Since each linestring has a endpoint at (or near) the startpoint of the next
linestring in the polygon, I am wondering if there is a method of detecting
the other linestrings, that forms a closed polygon, from that one contact.
From this I would compare the shape to known shapes to identify it.
I have some ideas on how to possibly do this, but, I would rather not invent
a function if a suitable one already exists.
Bob
-----Original Message-----
From: Nicolas Ribot
Sent: Wednesday, April 18, 2012 1:03 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] Returning contiguous linestrings
On 17 April 2012 19:21, Bob Pawley <rjpaw...@shaw.ca> wrote:
Hi
I have a polygon shape composed of contiguous linestrings inhabiting
different rows.
Is there a fairly direct procedure for returning the polygon after
detecting
a single linestring??
Bob
Hi Bob,
Could you explain a bit further what you want to do, I don't understand.
Nicolas
_______________________________________________
postgis-users mailing list
postgis-users@postgis.refractions.net
http://postgis.refractions.net/mailman/listinfo/postgis-users
_______________________________________________
postgis-users mailing list
postgis-users@postgis.refractions.net
http://postgis.refractions.net/mailman/listinfo/postgis-users
