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Hi Thomas,<br>
<br>
You will need a table with a record per page for the atlas coverage
layer.<br>
<br>
So if, f.e. you have a table with administrative units (with
geometries) and a table with temporal layers (e.g. an ortho-image
every 5 years or so) you will need to do a cross-join between the
two tables.<br>
<br>
See <a class="moz-txt-link-freetext" href="http://www.tutorialspoint.com/sqlite/sqlite_using_joins.htm">http://www.tutorialspoint.com/sqlite/sqlite_using_joins.htm</a><br>
<br>
You can use the new Virtual layer feature from QGIS 2.14 to create
such a layer on-the-fly without having to store a separate layer.
Let us know if you need help on the virtual layer.<br>
<br>
Hope this helps,<br>
Andreas<br>
<br>
<div class="moz-cite-prefix">On 01.03.2016 16:58, Thomas Colley
wrote:<br>
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<p class="MsoNormal">Hi everyone<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was just looking through the changelogs
and got really excited when I saw data defined control over
map layers! (<a moz-do-not-send="true"
href="http://www.qgis.org/en/site/forusers/visualchangelog212/index.html#feature-data-defined-control-over-map-layers-and-style-presets">http://www.qgis.org/en/site/forusers/visualchangelog212/index.html#feature-data-defined-control-over-map-layers-and-style-presets</a>)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is exactly what I’d been asking about
on the list last year (<a moz-do-not-send="true"
href="http://lists.osgeo.org/pipermail/qgis-user/2015-August/033211.html">http://lists.osgeo.org/pipermail/qgis-user/2015-August/033211.html</a>)
so thanks so much to Nyall for adding this functionality!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m not 100% sure that I’m using it in the
correct way though. I have managed to achieve it by
duplicating my atlas coverage features so that there is one
feature per layer with an attribute holding the layer name. I
then use the attribute in the data defined layers option.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this the way to do it or am I missing
something? I wasn’t sure where/if the ‘set layer list from a
visibility preset’ should come into play.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I first read the post I thought that
the | separated list of layers would be cycled through one by
one but then realised that they’d all be displayed together.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a static list of 20 or so layers to
cycle through for each site so ideally if I could specify a
list of layers (or visibility presets) to loop through that
would be amazing.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Failing that I can write a little plugin to
take a selected feature and create a scratch layer with the
feature duplicated with the layer attribute values.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks again for adding this, it’ll be a
massive time saver for us!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Tom<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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