[Qgis-user] Dot Density Symbology

[chris hermansen]

Hugh and list,

On Wed, Jul 26, 2023, 10:24 Hugh Kelley via QGIS-User <
qgis-user at lists.osgeo.org> wrote:

> Hi all,
>
> I've been producing dot density maps for demographics work by using
> postgis to assign points randomly within a polygon with the number of
> points determined by, for example, the total number of a population
> sub-group residing in that polygon.
>
> I"m wondering if there might be a way to do this directly from the
> polygons in QGIS with symbology.
>
> I've looked through the resource sharing plugin without luck. I dont'
> think the geometry generator can handle such a task but maybe there's a
> way?
>
> Here's (apologies for the closed source link) an example of the type of
> map/symbology I'm trying to describe.
> https://www.arcgis.com/apps/mapviewer/index.html?webmap=30d2e10d4d694b3eb4dc4d2e58dbb5a5
>
> Thanks for any suggestions!
>

What about just shading the polygons using a gray scale?

Given that your polygons should generate a uniform density of dots within
the area they bound, I don't see value in generating the dots for symbology.

Chris

>
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