[Qgis-user] Control Layers using Atlas

[Nyall Dawson]

On 15 August 2015 at 09:34, Alexandre Neto <senhor.neto at gmail.com> wrote:
> It would. I also thought that the same could be done to layer groups.
>
> Still, I would prefer to see data-defined properties for locking layer
> (presets) in map items in the map composer. It would be much easier to pick
> a few layers, create a few presets, and them "iterare" them in atlas.

That would work only for a very small number of features. But if you
had many (eg, layers per month/year) you'd end up with a ton of
presets for each matching atlas feature... seems like a management
nightmare to me!

Nyall


>
> Em sex, 14 de ago de 2015 às 23:27, Nyall Dawson <nyall.dawson at gmail.com>
> escreveu:
>>
>> On 15 August 2015 at 00:34, Alexandre Neto <senhor.neto at gmail.com> wrote:
>> > Hi,
>> >
>> > I made a few tests and, it works well for vector layer. All you need is
>> > the
>> > right coverage layer, a top rule in all layers that you need to
>> > controlo.
>> > Like you said, Yhis does not work for raster layer, neither it work for
>> > vector renderers like ppint displacement or heatmap.
>> >
>> > Also using legend filter, one can also adapt the maps legend.
>> >
>>
>> What about if there was a data-defined "layer visibility" control
>> available for vector and raster layers? Would that solve the problem?
>>
>> Nyall
>>
>>
>>
>> >
>> > Em sex, 14 de ago de 2015 às 12:10, Thomas Colley
>> > <it087 at neath-porttalbot.gov.uk> escreveu:
>> >>
>> >> Hi Alexandre
>> >>
>> >>
>> >>
>> >> I think the rule based symbology would work but I’m trying to print a
>> >> series of raster layers so unfortunately that’s not an option this
>> >> time.
>> >>
>> >>
>> >>
>> >> Thanks for your help, I’ll keep looking into it and let you know if I
>> >> find
>> >> anything.
>> >>
>> >>
>> >>
>> >> Tom
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> From: Alexandre Neto [mailto:senhor.neto at gmail.com]
>> >> Sent: 14 August 2015 11:59
>> >> To: Thomas Colley; qgis-user at lists.osgeo.org
>> >> Subject: Re: [Qgis-user] Control Layers using Atlas
>> >>
>> >>
>> >>
>> >> Hello Thomas,
>> >>
>> >> I had that need aswell. If data defined properties were made possible
>> >> in
>> >> the map composer lock preset option, that would be something direct to
>> >> do.
>> >>
>> >> Just occured that one might somehow achieve that by transforming each
>> >> layer's symbology into a rule-based symbology, and set a general rule
>> >> to
>> >> render the feature only if there is a match between a atlas coverage
>> >> field.
>> >> Dont' know if that would work, but it worth a try.
>> >>
>> >> Let me know if you could do it.
>> >>
>> >> Alexandre Neto
>> >>
>> >>
>> >>
>> >> Em sex, 14 de ago de 2015 às 11:44, Thomas Colley
>> >> <it087 at neath-porttalbot.gov.uk> escreveu:
>> >>
>> >> Hi
>> >>
>> >> Is it possible to use Atlas to print out a number of maps each showing
>> >> a
>> >> different layer instead of a different area of interest?
>> >>
>> >> I'm thinking the atlas layer would have the same area of interest
>> >> polygon
>> >> duplicated with an attribute that holds the layer name(s) to be
>> >> displayed.
>> >>
>> >> I'm sure I have seen this discussed/explained somewhere before but now
>> >> I
>> >> can't find anything on it, maybe I've just made it up!
>> >>
>> >> Thanks
>> >>
>> >> Tom
>> >>
>> >>
>> >>
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>> >
>> >
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