Thanks for the tips Alex, Andreas and Giovanni.
Unfortunately, I need to turnover the maintenance of the data to a
non-geo user, hence I need a workflow that can avoid R or postgis for
now.
On Tue, Jan 3, 2012 at 6:13 PM, G. Allegri gioha...@gmail.com wrote:
AFAICS ST_ConcaveHull is written in
On 01/02/2012 07:36 PM, maning sambale wrote:
We have a nifty convex hull in ftools/vector plugin. I'm looking for
ways to create concave hulls. I have a set of csv points as a source
to generate the polygon. This is updated regularly by non-geo field
workers. Any workaround to generate
Hi,
Postgis SVN (2.0) has a function called ST_ConcaveHull
(http://www.postgis.org/documentation/manual-svn/ST_ConcaveHull.html) -
it says it builds upon GEOS - (but probably only in geos-svn) - so there
should be some way to expose it in a future QGIS version.
See also this thread:
AFAICS ST_ConcaveHull is written in PL/PgSQL, and doesn't use GEOS methods
[1].
I suppose it is based on the common alpha shapes [1] approach.
Martin has written something for JTS, but I think he hasn't release it
yet...
giovanni
[1]
We have a nifty convex hull in ftools/vector plugin. I'm looking for
ways to create concave hulls. I have a set of csv points as a source
to generate the polygon. This is updated regularly by non-geo field
workers. Any workaround to generate concave hull in QGIS?
Mappy new year to all!
PS.
