[Qgis-us-user] question about linking multiple data sets so they can be turned on/off

Not sure if I posted anything about this before but still looking for answers.

I’m new to QGIS, obviously.

I’ve loaded a shapefile of a us congressional district, which spreads across 3 counties
Next I have added shapefiles of voter precincts in those counties.
Next I have joined excel files of voter data from 2018 to the 3 individual counties/precincts.
So I have the district and 3 county/precinct/data layers. I’ve added a color ramp
so far all good, pretty excited at what I accomplished.

Now I want to add data from 2016
I understand I could join additional excel files, but then all the data from both years would
be included. What I want is to be able to select/unselect the 2 years, ultimately be able to add
additional data, such as demographics. Need to be able to turn on/off each data set.

I got the impression somewhere I could save/export what I have so far, start over? and do the same thing with the other data? but I’m not at all clear on exactly how to do that.

Any help greatly appreciated.

Thanks,
Dan

You can select all the layers for 2018 and right-click (working off memory) and place in a group which you can then label “2018”. Then add all your 2016 layers and group it as “2016”. That way, you only have to check/uncheck one box for the “group” and it turns on/off all the layers in that group.

Hope this helps!
Kerrie

On Sun, May 12, 2019 at 11:28 AM Dan Nichols <dan.nichols@gmail.com> wrote:

Not sure if I posted anything about this before but still looking for answers.

I’m new to QGIS, obviously.

I’ve loaded a shapefile of a us congressional district, which spreads across 3 counties
Next I have added shapefiles of voter precincts in those counties.
Next I have joined excel files of voter data from 2018 to the 3 individual counties/precincts.
So I have the district and 3 county/precinct/data layers. I’ve added a color ramp
so far all good, pretty excited at what I accomplished.

Now I want to add data from 2016
I understand I could join additional excel files, but then all the data from both years would
be included. What I want is to be able to select/unselect the 2 years, ultimately be able to add
additional data, such as demographics. Need to be able to turn on/off each data set.

I got the impression somewhere I could save/export what I have so far, start over? and do the same thing with the other data? but I’m not at all clear on exactly how to do that.

Any help greatly appreciated.

Thanks,
Dan


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