On Tue, Feb 13, 2018 at 9:02 AM, Paolo Cavallini
wrote:
>
> Hi Markus,
>
> Il 12/02/2018 21:46, Markus Metz ha scritto:
>
> > The original data in EPSG:3003 and EPSG:3857 are not identical. The
> > original data in EPSG:3003 are topologically correct, while the original
> > data in EPSG:3857 are n
Hi Markus,
Il 12/02/2018 21:46, Markus Metz ha scritto:
> The original data in EPSG:3003 and EPSG:3857 are not identical. The
> original data in EPSG:3003 are topologically correct, while the original
> data in EPSG:3857 are not.
interesting. so reprojecting creates errors (tiny gaps, in fact).
On Mon, Feb 12, 2018 at 6:22 PM, Paolo Cavallini
wrote:
>
> Il 11/02/2018 18:34, Markus Metz ha scritto:
>
> > This implies that the data have been reprojected at some stage somewhere
> > from one SRS to the other. The most likely explanation for the different
> > results, particularly the topolog
Il 11/02/2018 18:34, Markus Metz ha scritto:
> This implies that the data have been reprojected at some stage somewhere
> from one SRS to the other. The most likely explanation for the different
> results, particularly the topological errors reported by v.in.ogr, is
> that non-topological polygons
On Sun, Feb 11, 2018 at 11:06 AM, Helmut Kudrnovsky wrote:
>
> >v.generalize is failing to simplify some of my geometries when in
> >EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
> >Incorrect borders were reported, unclear to me why.
>
> In your first report you're talking about th
>v.generalize is failing to simplify some of my geometries when in
>EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
>Incorrect borders were reported, unclear to me why.
In your first report you're talking about the same data set in different
EPSG defined projections.
>I'm not explic
Thanks Markus for the hint.
Replies below.
Il 10/02/2018 22:53, Markus Metz ha scritto:
> This seems to be a reprojection problem.
>
> If you reprojected the vector data in GRASS with v.in.ogr + v.proj, this
> is a problem of GRASS, granted that v.in.ogr did not complain about
> vector topology.
Il 09/02/2018 19:25, Markus Neteler ha scritto:
> On Fri, Feb 9, 2018 at 6:19 PM, Paolo Cavallini wrote:
>> Hi all,
>> v.generalize is failing to simplify some of my geometries when in
>> EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
>> Incorrect borders were reported, unclear to m
On Fri, Feb 9, 2018 at 6:19 PM, Paolo Cavallini
wrote:
>
> Hi all,
> v.generalize is failing to simplify some of my geometries when in
> EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
> Incorrect borders were reported, unclear to me why.
> All the best, and thanks for any hint.
Thi
On Fri, Feb 9, 2018 at 6:19 PM, Paolo Cavallini wrote:
> Hi all,
> v.generalize is failing to simplify some of my geometries when in
> EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
> Incorrect borders were reported, unclear to me why.
Please let us know which GRASS GIS version you
Hi all,
v.generalize is failing to simplify some of my geometries when in
EPSG:3857. Same geoms in EPSG:3003 were simplified correctly.
Incorrect borders were reported, unclear to me why.
All the best, and thanks for any hint.
===
Avvio dell'algoritmo v.generalize.simplify - Vector based simplifica
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