Hi Richard,
What do you get if you run db.connect -p in the relevant mapset?
Here's my output:
GRASS 6.4.2RC2 (EPSG:3857 - Pseudo-Mercator):~ db.connect -p
driver:pg
database:host=localhost,dbname=isis_db_extern
schema:
group:
Seems to be okay, right? In any case, the last spatial join try
Okay, first of all, thanks once again for all the patience and the huge
amount of help. I'm now quite a bit further and just wanted to report back
on how it all worked out so that people in similar quandries will be able
to deal :) It doesn't work all the way yet, but at least I'm a lot closer
SUCCESS!
One last idea came: Why not try updating the attributes backwards -
uploading the attributes of the centroids from the former raster polygons
into the buildings that they belonged to? The following command updated the
vectors properly by extracting the centroid values of
On 27/11/11 5:30 AM, Daniel Lee wrote:
Just another thing that's really weird - I ended up exporting the
geometries from GRASS to shapefiles, importing them to PostGIS with
shp2pgsql and viewing them in QGIS from the DB directly, just to see
if that would work. It did, just fine. Then I tried
2011/11/24 Micha Silver mi...@arava.co.il
There are two separate metadata tables in newer PostGIS versions. The
original geometry_columns is a real table as listed above. In addition
there is support for the geography data type for layers in geographic
(Lat/Lon) coordinate systems. With the
Just another thing that's really weird - I ended up exporting the
geometries from GRASS to shapefiles, importing them to PostGIS with
shp2pgsql and viewing them in QGIS from the DB directly, just to see if
that would work. It did, just fine. Then I tried to view them with the
Geoserver again and
On 11/26/2011 05:10 PM, Daniel Lee wrote:
Alright, I just tried it again and, again, no dice,
although at least my thematic tables are stored in the PostGIS DB.
Here's what's going on:
- I am the owner of the tables that are created in PostGIS.
Alright, I think the last suggestion got me a LOT further.
2011/11/26 Micha Silver mi...@arava.co.il
My guess: Wasn't your Gebaeude_Globalstrahlung table also a GRASS vector?
So it also has a cat column?
What v.db.join does is try to create a new column in the map's table for
*each* column
Okay, sorry to bug again, but now I do have kind of the same problem again.
Here we go:
v.out.ogr only gives me the field cat in the attribute table, all other
fields are gone:
v.out.ogr input=Buildings@PERMANENT type=area dsn=/tmp/buildings.shp
layer=2 --overwrite
The geometries are exported,
On 26/11/2011 22:09, Daniel Lee wrote:
Okay, sorry to bug again, but now I do have kind of
the same problem again. Here we go:
v.out.ogr only gives me the field cat in the attribute table,
all other fields are gone:
v.out.ogr
On 24/11/11 17:18, Daniel Lee wrote:
IIRC, geography_columns is a view, not sure why you would even want
to access that...
I don't have time right now to try to find out where the error
message comes from. Can you give us the exact v.in.ogr command you use ?
Gotcha. I think it
Dear Daniel,
Try to find the owner of your geography tables.
Most probably, it will be postgres.
So, login as postgres and from their grant all on geography tables to the
desired owner.
You may copy , paste and search this phrase how to find owner of a
postgis table
You can use v.distance with dmax=0 to do such a spatial join between
polygons and points:
v.db.addcolumn YourCentroids col='poly_cat int'
v.distance from=YourCentroids to=YourPolygons upload=cat column=poly_cat
dmax=0
This should upload the category values of your polygons to the
On 24/11/11 09:47, Daniel Lee wrote:
I'm currently
trying to upload the data into my PostGIS DB to do the next step, but
I'm having some trouble there - I get the following error when using
v.out.ogr:
ERROR 1: ERROR: permission denied for relation geography_columns
ERROR 1: PostgreSQL driver
On 24/11/2011 10:47, Daniel Lee wrote:
You can use v.distance with dmax=0 to do such a "spatial
join" between polygons and points:
v.db.addcolumn YourCentroids
IIRC, geography_columns is a view, not sure why you would even want to
access that...
I don't have time right now to try to find out where the error message
comes from. Can you give us the exact v.in.ogr command you use ?
Gotcha. I think it is a table, actually:
test=# \dt
Hi there,
You can use v.distance with dmax=0 to do such a spatial join between
polygons and points:
v.db.addcolumn YourCentroids col='poly_cat int'
v.distance from=YourCentroids to=YourPolygons upload=cat column=poly_cat
dmax=0
This should upload the category values of your polygons to
Hi group,
Does anyone have a good idea of how to join vector areas by location? I'm
trying to do aggregated statistics on vector maps using extracted values
from rasters. I want the sum of the raster cells that lie within the
vectors to be inserted into the vector attribute table. So far I've
Hi Daniel.
You should use v.rast.stats [1] as it Calculates univariate statistics
from a raster map based on
vector polygons and uploads statistics to new attribute columns. Should
be a more straight
forward approach.
Best Regards,
Daniel.
[1]
Hi Daniel,
Very cool name :)
You should use v.rast.stats [1] as it Calculates univariate statistics
from a raster map based on
vector polygons and uploads statistics to new attribute columns. Should
be a more straight
forward approach.
Thanks for the tip, but v.rast.stats gives me all
Hi Daniel,
According to the documentation of [1] and previous discussions [2],
v.rast.stats2 should be a lot faster.
You should be able to change the BASECOLS variable in the script
to only output the sums, which might speed things up for you.
Hope that helps.
Regards,
Daniel.
[1]
2011/11/21 daniel mcinerney daniel.o.mciner...@gmail.com
According to the documentation of [1] and previous discussions [2],
v.rast.stats2 should be a lot faster.
Awesome! Only... I've got a problem here... Sorry to be so nooby, but
here's what's going on:
GRASS 6.4.2RC1 (ETRS89_ll):~
Alright, I just figured out a way to do it, albeit an unelegant way that
requires using another program.
I converted the rasters to vectors as usual. Then I did the following in
order to preserve the original polygons:
- Extracted the centroids by using v.select
- Converted the centroids to
Daniel Lee wrote:
GRASS 6.4.2RC1 (ETRS89_ll):~ g.extension extension=r.univar.zonal
WARNING: GRASS_ADDON_PATH is not defined, installing to ~/.grass6/addons/
Fetching r.univar.zonal from GRASS-Addons SVN (be patient)...
...
for g.extension please try the new 6.4.2rc2 built from source code,
On 21/11/11 18:00, Daniel Lee wrote:
2011/11/21 daniel mcinerney daniel.o.mciner...@gmail.com
mailto:daniel.o.mciner...@gmail.com
According to the documentation of [1] and previous discussions [2],
v.rast.stats2 should be a lot faster.
Awesome! Only... I've got a problem here... Sorry
On 21/11/11 19:24, Daniel Lee wrote:
Alright, I just figured out a way to do it, albeit an unelegant way that
requires using another program.
I converted the rasters to vectors as usual. Then I did the following in
order to preserve the original polygons:
- Extracted the centroids by using
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