[Qgis-user] Question about city layer density

[Joe Stepansky]

Thank you Szilard. I knew about the scale dependent visibility, but hadn’t considered creating layers with different size cities and different visibility levels. That should work just fine. 

 

Joe

 

From: szilard.albert at gmail.com [mailto:szilard.albert at gmail.com] On Behalf Of Szilard Albert
Sent: Sunday, April 03, 2016 7:30 AM
To: Joe Stepansky
Cc: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Question about city layer density

 

Joe,

what you seem to need is "scale dependent visibility".

To achieve this, go to "layer properties", "general" tab, and enable "scale dependent visibility".

Set your scales as preferred. This will show or hide all your cities, depending on the zoom level, 

but you can make different layers with different classes of cities, and enable/disable their
visibility at different zoom levels.
regards,

Szilard

 

On 3 April 2016 at 21:01, Joe Stepansky <kq3f at comcast.net> wrote:

I’m relatively new to QGIS, so forgive any naivete.

 

I’m working on a project displaying severe weather outlooks on a map of the US. It’s gone very well, but I have one issue. I’m using a layer which displays city locations and labels on the map. When zooming in to a specific state, all looks fine. But when I pull back to several states, the map can look cluttered with city points and labels.

 

The labels don’t run into each other, there are just so many of them when I zoom out. Is there some way to get QGIS to automatically remove “random” cities (I really don’t care which ones) as the map is zoomed out, and restore them as the map is zoomed in?

 

Right now I’m manually using a filter to remove “excess” cities, but I can’t seem to find a nice, automated solution.

 

Thanks for any help!

 

Joe Stepansky

Harrisburg, PA


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-- 

Szilard Albert

www.dayborogeo.com

Phone: +61 7 3889 9505

Mobile: +61 403 860274

 

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