Have you considered using point features for your layer with an attribute for diameter? You can then symbolize with a circle scaled to the diameter attribute. This doesn't answer why you're getting diamonds, but gives you the map you want.


      
Le 7 août 2020 à 13:26, Robert D. Bowers M.A. <[email protected]> a écrit :

QGIS version 3.1.8
I have a shapefile I'm working with, showing the locations of a number of what are called "post molds" - evidence that a post was put in the ground there at one point.  I've drawn circles for each post mold, but they're all rendering (showing) as diamonds - squares rotated 45 degrees.  Other shapes also are not rendering quite as smoothly as drawn (freehand).

I cannot figure out what is causing this (the wrong shape for the circles).  I can draw ellipses and they show up fine.  I'm really reluctant to try to redraw any of the existing ones - there are several.

The map itself covered an area of about 50 meters by 50 meters.  The circles are all in the 2-5 decimeter range (approximate).

Also, is it possible to re-size an existing polygon - for instance make an ellipse larger than the original?

Thanks!

Bob

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