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xbikuna / nettopologysuite

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Geodedic Buffeer #109

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
Geometrys operations like distance and buffer are euclidean (or 2D Cartesian) 
not Geodesic, so when we operate with wgs84 geometries we get distance errors.

Original issue reported on code.google.com by jt.cadil...@gmail.com on 27 Mar 2012 at 5:30

GoogleCodeExporter commented 8 years ago 
Geodesic operations are not supported.

Here an excerpt from JTS FAQ: 
http://tsusiatsoftware.net/jts/jts-faq/jts-faq.html#F
Q: Does JTS support computation on the geodetic ellipsoid ?
A: No. JTS currently assumes that geometries are defined in a Cartesian, 
planar, 2-dimensional space. Thus it cannot be used to compute accurate 
metrics, predicates or constructions on the geodetic ellipsoid which is usually 
used to model the surface of the Earth. It is hoped to provide geodetic 
operations in a future version.

Original comment by diegogu...@gmail.com on 28 Mar 2012 at 7:11

GoogleCodeExporter commented 8 years ago 
It is possible to work around, converting wgs84 coordinates to a cartesian or 
projected coordinate system before buffering?

Original comment by jt.cadil...@gmail.com on 28 Mar 2012 at 9:03

GoogleCodeExporter commented 8 years ago 
Sure, using Proj.Net (http://projnet.codeplex.com) or DotSpatial 
(http://dotspatial.codeplex.com).
Please ask for tis kind of help in the google group:
https://groups.google.com/forum/#!forum/nettopologysuite

Original comment by diegogu...@gmail.com on 28 Mar 2012 at 9:07

GoogleCodeExporter commented 8 years ago 
I create a thread in forum, i hope to have a quick answer.

Thanks

Original comment by jt.cadil...@gmail.com on 28 Mar 2012 at 4:13