[Qgis-user] Automated printing looping through features?

[Vincent Picavet]

Hello Morten,

Here is the process.

* Create a coverage layer (named "cov" here), with all the same polygons 
(could be different if you want specific areas for specific values), and a field 
named "xvalue", which values go from 1 to 999. You can create this layer 
easily with PostGIS and generate_series for example

* For the layer you want to display or not given the value of its "x" 
attribute, do the following :
** set the style to rule-based
** create a new rule
** set the label to "display" (e.g.) and the filter to :
"x" = attribute($atlasfeature, 'xvalue')

* create a composer with a map displaying the layer
* in the atlas tab, set coverage layer to "cov", and check "hidden"
* you can preview and export the atlas, having your result

You can have much more complex rules and change the polygon which define the 
extent for each map you want to have.

Enjoy :-)

Vincent

Le mardi 6 janvier 2015 11:04:05, magerlin a écrit :
> Anybody got an idea on how to automate this process in Qgis:
> 
> I want to print separate maps for each different value of an attribute
> like: * One map showing all features with attribute value x=1
> * One map showing all features with attribute value x=2
> ....
> * One map showing all features with attribute value x=999
> 
> It sounds like a straightforward task but I have not found any automated
> solution - I can of course do it manually but it ends up being quite
> boring!
> 
> It is a bit like making an atlas and I have considered using my layer as
> atlas coverage layer but since features with x=1 and x=2 might be at the
> same location I need to only see the actual features with x=1 and not
> features with x=2 at the same time. And I need to see ALL features with x=1
> at the same map, not on separate maps.
> 
> I have been wondering of using the "Filter with" functionality in some way
> but have not found a solution.
> 
> 
> 
> 
> 
> -----
> Regards Morten
> 
> Currently using Qgis 2.6.0 (OSGeo4),
> Windows 7, 64bit
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/Automated-printing-looping-through-fea
> tures-tp5180161.html Sent from the Quantum GIS - User mailing list archive
> at Nabble.com. _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user