Hi All,
Dose GEOS supports buffer of self-intersected polygon, just like 'POLYGON
((2 2,-2 -2,2 -2,-2 2,2 2))'. I get the wrong polygon result with
GEOSBuffer('POLYGON ((2 2,-2 -2,2 -2,-2 2,2 2))',0.5,8). I use newest verion.
Thanks.
Jiong___
On Thu, Dec 09, 2010 at 04:59:24PM +0800, xie_jiong wrote:
Hi All,
Dose GEOS supports buffer of self-intersected polygon, just like 'POLYGON
((2 2,-2 -2,2 -2,-2 2,2 2))'. I get the wrong polygon result with
GEOSBuffer('POLYGON ((2 2,-2 -2,2 -2,-2 2,2 2))',0.5,8). I use newest verion.
Hi,
I am exploring GEOS features. I want to know if it is possible to merge or
join 2 polygons?
And if I have MultiplePolygons and want to merge /join them all, is there
any such method in GEOS?
Your kind help is appreciated.
Thanks,
Namrata
--
View this message in context:
On Thu, Dec 09, 2010 at 03:10:00AM -0800, Namrata wrote:
Hi,
I am exploring GEOS features. I want to know if it is possible to merge or
join 2 polygons?
And if I have MultiplePolygons and want to merge /join them all, is there
any such method in GEOS?
Sure. See the Union operation.
For
On Wed, Dec 8, 2010 at 10:34 PM, J Smith dark.panda+li...@gmail.com wrote:
On Thu, Dec 9, 2010 at 12:09 AM, Charlie Savage c...@savagexi.com wrote:
I believe that the crux of the problem may be due to GEOS's error
handlers using varargs, which libffi cannot handle in callbacks
according to its
On Thu, Dec 9, 2010 at 12:32 PM, Sean Gillies sean.gill...@gmail.com wrote:
FWIW, here's the GeoDjango approach:
http://code.djangoproject.com/browser/django/trunk/django/contrib/gis/geos/libgeos.py#L53
and the Shapely approach:
Alright, I think it's all good. I posted to the ruby-ffi list and got
back a response already and the prognosis is good! See
http://groups.google.com/group/ruby-ffi/browse_thread/thread/836d6c772d8088dc
, wherein I picked up the science that Mr. Wayne Meissner laid down.
Ah, reading his
