mars 2016 15:59
Till: qgis-user@lists.osgeo.org
Ämne: Re: [Qgis-user] Atlas: Filter Empty Pages
Hello!
So, finally, I was successful: The idea with the virtual layer made it simple,
as the point data is a postgis layer anyway, after storing the grid in the
database, I created a view, where I ha
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Från: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] För Albin Blaschka
Skickat: den 22 mars 2016 15:59
Till: qgis-user@lists.osgeo.org
Ämne: Re: [Qgis-user] Atlas: Filter Empty Pages
Hello!
So, finally, I was successful: The idea with the virtual layer made it
simple, as the point data is a postgis layer anyway, after storing the
grid in the database, I created a view, where I have my grid and the
count of points per cell, which I use for the creation of the atlas.
Brings
Hi Albin,
You can do this dynamically. The Atlas filter also accepts geometry
relationship functions. Have a look at the QGIS expression editor.
You can try with the intersects / within / overlaps tests and test
$geometry against @atlas_geometry.
Your filter could look like:
within( $geome
hm - actually, I was wrong.
It is not so easy to filter dynamically - as $geometry equals
@atlas_geometry and you don't have a relation with the points.
My next try would be to use a "Virtual Layer" and add a spatial
relationship between your atlas coverage layer (the grid) and a column
cont
Use Spatial Query to select the non-empty elements.
1) Give the non-empty elements a new property (with table editor) (1 as opposed
to 0 for the empty ones)
2) Or save the selected elements as a new layer
if 1) then filter these elements in the filter option in the atlas configuration
hope it w
Am 21.03.2016 um 14:20 schrieb Bernd Vogelgesang:
sounds maybe to easy, but why don't you just make a spatial query on
your coverage grid to select and save those elements which do have
points inside (Grid Layer Contains Points Layer e.g.) and then use
that new coverage layer to produce your At
Hello Albin,
you need to filter out the empty elements (grid cells) in the coverage layer
(those ones that have no overlap to the points). After that you can swap the
selection set to get the non-empty grid cells that are to be printed and give
those (as memory layer if no repeated use) to the
Hi Albin,
sounds maybe to easy, but why don't you just make a spatial query on your
coverage grid to select and save those elements which do have points
inside (Grid Layer Contains Points Layer e.g.) and then use that new
coverage layer to produce your Atlas?
Or do you search for a more c
