[postgis-users] Three point ARC to MULTILINESTRING

[Obe, Regina]

Not to mention transform support.  Last I tried you can't transform
circular strings.

________________________________

From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
Bruce Rindahl
Sent: Friday, April 18, 2008 11:50 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] Three point ARC to MULTILINESTRING


Paul
Do we have any documentation on this?  I checked latest but there is
limited info there.

This is a great post but I don't think anyone answered it.
http://postgis.refractions.net/pipermail/postgis-devel/2007-September/00
2778.html

I would love to add this to the asSVG since SVG handles circular arcs.
Where are we on the other issues  for support (i.e area(), psql2shp,
length(), etc.)?

Thanks!
Bruce Rindahl

 Paul Ramsey wrote: 

	Use the CIRCULARSTRING type, and the ST_CurveToLine(geometry)
function
	to convert it to a linestring.
	
	CREATE TABLE test ( GEOM geometry );
	INSERT INTO test VALUES ('CIRCULARSTRING(0 0, 1 1, 2 0)');
	SELECT ST_AsText(ST_CurveToLine(geom)) FROM test;
	
	
	P
	
	On Fri, Apr 18, 2008 at 7:53 AM, JohanNL
<johan12365 at hotmail.com> <mailto:johan12365 at hotmail.com>  wrote:
	  

		 Hi All,
		
		 I have a question. I need to store an Arc into a
postgis database. As far as
		 I know, Postgis doens't support arcs. Is there another
way to convert a
		 Three Point Arc to a MultiLineString?
		
		 Best regards,
		
		 Johan.
		 --
		 View this message in context:
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