[Qgis-user] Drawing circles on maps at 600 ft diameters out to 3000 feet from a specific point

[Andreas Neumann]

Hi Michael,

There are several methods to achieve what you want. It also depends if you
want this to be "live linked" with your original points, meaning if you
shift the points the buffer circles should automatically adjust or not.
Also, if you need this to be "visual only" or if you need real new
geometries.

I am listing some of the options here:

- Use geometry generators with several buffer expressions (this is visual
only, but live-linked to your point geometries)
- Use pie charts and feet as units (visual only and live-linked)
- Use "virtual layers" and several buffer expressions (this can be
live-linked but needs SQL knowledge)
- Use PostGIS SQL to create live-linked layers (this can be live-linked but
needs SQL knowledge)
- Use Processing and the Buffer algorithms
- use one of the plugins

Personally, I see reason why you'd have to use one of the plugins. QGIS
offers everything you need out of the box.

Also - for your other question: dissecting into quadrangles - again, there
are several options:
- use symbol levels and quadrangle circles (these are shipped by default by
QGIS). Use expression functions to change size, anchor points and rotations
- use the new improvements in QGIS 3.40, stacked partial pie charts
(partial pie charts defined by a start and stop angle). See
https://www.qgis.org/project/visual-changelogs/visualchangelog340/#feature-introduce-stacked-diagrams
- Use the expression function wedge_buffer and geometry generators
- Use the wedge_buffer algorithm in the QGIS processing tools

I am not going into details about the various methods, unless you tell us
more about your needs:
- visual only versus real geometries
- live-link or not

Hope this helps to find the best methods. As always: please also use the
excellent documentation at
https://docs.qgis.org/3.40/en/docs/user_manual/index.html, consult with
video tutorials or consult with your favourite AI tool.

Best regards,
Andreas

On Wed, 26 Feb 2025 at 02:26, Michael Walker via QGIS-User <
qgis-user at lists.osgeo.org> wrote:

>
> I am new to this software mapping program and am interested in creating some maps with circles around specific points on the map at 600 feet intervals.  (600 feet, 1200 feet, 1800 feet, 2400 feet and 3000 feet)  I will need to be able to draw these circles without covering the aerial view or topographical view features under them as well as draw lines disecting these circles into 4 quardrans.   Is this software able to perform these tasks??
>
> Any help is greatly appreciated,
> Thanks
>
> Michael J. Walker
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-- 

--
Andreas Neumann
QGIS.ORG board member (treasurer)
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