Re: [GRASS-dev] area calculations in several GIS

2018-10-04 Thread Markus Metz
ber 2018 22:46 > Til: Markus Metz > Cc: Kristian Evers ; GRASS developers list < grass-dev@lists.osgeo.org>; Helmut Kudrnovsky > Emne: Re: SV: [GRASS-dev] area calculations in several GIS > > In comparisons like this, it's probably a good idea to document what > areas t

Re: [GRASS-dev] area calculations in several GIS

2018-10-02 Thread Markus Metz
f the two but it is never > > going to represent the true area, especially for large polygons, and I > > would not advice using it as reference for ellipsoidal area calculations. > > > > > > > > > > > > The question is, what can be used as refere

Re: [GRASS-dev] area calculations in several GIS

2018-10-02 Thread Moritz Lennert
gt; > > Fra: Markus Metz <mailto:markus.metz.gisw...@gmail.com>> > Sendt: 2. oktober 2018 11:51 > Til: Kristian Evers mailto:kr...@sdfe.dk>> > Cc: GRASS developers list <mailto:grass-dev@lists.osgeo.org>>; Helmut Kudrnovsky <mailto:hel...@web.de>> &g

Re: [GRASS-dev] area calculations in several GIS

2018-10-02 Thread Markus Metz
mut Kudrnovsky < hel...@web.de> > Emne: Re: [GRASS-dev] area calculations in several GIS > > > > > > On Tue, Oct 2, 2018 at 8:47 AM Kristian Evers wrote: > > > > Markus, > > > > > > Thanks for extending the list. I do wonder why Planimeter g

Re: [GRASS-dev] area calculations in several GIS

2018-10-02 Thread Markus Metz
Markus M > > /Kristian > > > > > > Fra: Markus Metz > Sendt: 1. oktober 2018 23:22 > Til: GRASS developers list ; Kristian Evers < kr...@sdfe.dk> > Cc: Helmut Kudrnovsky > Emne: Re: [GRASS-dev] area calculations in several GIS > > > > U

Re: [GRASS-dev] area calculations in several GIS

2018-10-01 Thread Markus Metz
Updated list with area calculations for https://gist.github.com/kbevers/207b5bcb9be20e7554abe5f56742ec2c PROJ [1]:14,737.935 km^2 Caris LOTS: 14,737 km^2 ArcMap: 14,727.446 km^2 MapInfo: 14,727.352 km^2 GeoMedia:14,726.443 km^2 Planimeter: 14,722.522 km^2 GRASS GIS: 14.718.098

Re: [GRASS-dev] area calculations in several GIS

2018-10-01 Thread Markus Metz
On Tue, Sep 25, 2018 at 7:38 PM Helmut Kudrnovsky wrote: > > fyi see > https://lists.osgeo.org/pipermail/qgis-developer/2018-September/054644.html > > with GRASS mentioned > -- > Kristian Evers: > > Right, here are the calculated areas as returned by a number of different > GIS app

Re: [GRASS-dev] area calculations in several GIS

2018-09-26 Thread Helmut Kudrnovsky
>Here are GRASS area measures for the given geometry: >In WGS84: 14718097678.6716 tested here with winGRASS 7.7.svn in a wgs84 Location: m2|km2 14718097678,673|14.718,097679 - best regards Helmut -- Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Dev-f3991897.html ___

Re: [GRASS-dev] area calculations in several GIS

2018-09-26 Thread Stefan Blumentrath
e) Cheers Stefan -Original Message- From: grass-dev On Behalf Of Helmut Kudrnovsky Sent: tirsdag 25. september 2018 19:38 To: grass-dev@lists.osgeo.org Subject: [GRASS-dev] area calculations in several GIS fyi see https://lists.osgeo.org/pipermail/qgis-developer/2018-September/054644.

[GRASS-dev] area calculations in several GIS

2018-09-25 Thread Helmut Kudrnovsky
fyi see https://lists.osgeo.org/pipermail/qgis-developer/2018-September/054644.html with GRASS mentioned -- Kristian Evers: Right, here are the calculated areas as returned by a number of different GIS applications and the planimeter app of GeographicLib for reference: Caris LOT