Thanks!
We are currently considering using PostGIS Topology only to maintain a
topology aware copy of the data (to be used for analyses where topology
matters) and use the original geometry (containing circular strings)
when we have to (re)generate output geometry.
BTW: Is cgal/sfcgal going to replace geos eventually? It would be great
if this limitation (= curved geometries being a second class citizen)
was somehow lifted in future versions PostGIS.
Regards,
Reijer Copier
IDgis bv
Volg IDgis op LinkedIn! <http://www.linkedin.com/company/idgis>
On 14-4-2014 19:15, Rémi Cura wrote:
The problem is going to be precision.
If this is important for you you may want to switch to cgal which
support arbitrary curve in arrangment (from memory)
If precision is not important, you can easily add an uggly fix : add 2
triggers to edge table that
_when something want to access an edge, convert it to linestring
_when something want to write an edge, convert it to your curve model
Cheers,
Rémi-C
2014-04-14 17:10 GMT+02:00 Eric Ladner <eric.lad...@gmail.com
<mailto:eric.lad...@gmail.com>>:
As long as they are simple circles, you should be able to convert
back and forth between curves and lines. Splines, beziers, et al,
are probably not going to work at all and would need to be
approximated as lines.
http://boundlessgeo.com/2012/01/getting-curvey/
On Mon, Apr 14, 2014 at 8:02 AM, Reijer Copier
<reijer.cop...@idgis.nl <mailto:reijer.cop...@idgis.nl>> wrote:
Dear list,
According to the documentation, PostGIS Topology only supports
edges made out of linestrings. However, we are currently
working on a dataset that contains lots of curved geometries.
It would be great if we could build topology based on those
curved geometries without having to convert them to
linestrings first. Is this possible? If not, what is the best
way to deal with this situation?
--
Kind regards,
Reijer Copier
IDgis bv
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--
Eric Ladner
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