[GRASS-user] v.rast.stats error

[Lorenzo Bottaccioli]

Hi Martin,

Here is the output of v.info. I need to use PostGIS connection because I
have to expose the results via web-service. The fact is that I multiple
raster file for which I have to perform some simple mapalgebra, and then
querry the results from them and expose them trough web services. Any
suggestion for this?

 +----------------------------------------------------------------------------+
 | Name:            areasuit
   |
 | Mapset:          lorenzo
  |
 | Location:        prova
  |
 | Database:        /home/lorenzo/grassData
  |
 | Title:
  |
 | Map scale:       1:1
  |
 | Name of creator: lorenzo
  |
 | Organization:
   |
 | Source date:     Fri Nov 20 17:15:02 2015
   |
 | Timestamp (first layer): none
   |
 |----------------------------------------------------------------------------|
 | Map format:      PostGIS (PostgreSQL)
   |
 | DB table:        public.areasuit
  |
 | DB name:         gis_1
  |
 | Geometry column: geom
   |
 | Feature type:    polygon
  |
 | Topology:        pseudo (simple features)
   |
 |----------------------------------------------------------------------------|
 |   Type of map: vettoriale (level: 2)
  |
 |
   |
 |   Number of points:       0               Number of centroids:  4002
  |
 |   Number of lines:        0               Number of boundaries: 4022
  |
 |   Number of areas:        4022            Number of islands:    4022
  |
 |
   |
 |   Map is 3D:              No
  |
 |   Number of dblinks:      1
   |
 |
   |
 |   Projection: Latitudine-Longitudine
  |
 |
   |
 |               N:  45:04:24.507374N    S:  45:03:03.227962N
  |
 |               E:   7:40:23.868382E    W:   7:38:42.814094E
  |
 |
   |
 |   Digitization threshold: 0
   |
 |   Comment:
  |
 |
   |
 +----------------------------------------------------------------------------+

2015-11-20 17:33 GMT+01:00 Martin Landa <landa.martin at gmail.com>:

> Hi,
>
> 2015-11-20 17:28 GMT+01:00 Lorenzo Bottaccioli <
> lorenzo.bottaccioli at gmail.com>:
> > I'have created the vector with r.to.vect, before I have liked
> > v.exeternel.out to the PostGIS DB. If I run v.what.rast there is no
> problem
> > but I believe that the results are different.
>
> OK, now I understand, v.what.rast operates on points/centoids,
> v.rast.stats on areas. There is something wrong with areas. Generally
> speaking I cannot suggest to use PostGIS links in GRASS for production
> work. Use native format instead.
>
> Ma
>
> --
> Martin Landa
> http://geo.fsv.cvut.cz/gwiki/Landa
> http://gismentors.cz/mentors/landa
>
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