Bug report #15616

large point markers not rendered if center is outside visible extent

Added by Jochen Huber over 7 years ago. Updated over 5 years ago.

Affected QGIS version:2.16.3 Regression?:No
Operating System:Windows Easy fix?:No
Pull Request or Patch supplied:No Resolution:end of life
Crashes QGIS or corrupts data:No Copied to github as #:23539


When using large marker symbols for point markers the symbols are not rendered if the point itself is outside the viewing extent, even if most of the symbol would be visible.
Example: We have a project where contaminated soil is removed using overlapping boreholes with large diameter (1.8 m). For every borehole we get the coordinates measured for the center at the top and bottom, from which we create a point layer. To check if the boreholes are overlapping as intended, we draw circle markers with the diameter of the drill (see screenshots). This is easier than having to crate a polygon layer with circles around each point and avoids the problem that most formats can only store polygons and not real circles. It is irritating however that boreholes where the center is not within the viewing extent are not drawn (like borehole #116 at the top in the screenshots).
One possible solution would be to render all points within an extent buffered by the size of the symbols (can be in map units or page units - this has to be taken into consideration).
Don't know if this should really be seen as a bug or rather as a feature request.

116_visible.png - Marker for point #116 is rendered (105 KB) Jochen Huber, 2016-09-26 03:38 AM

116_not_visible.png - Marker for point #116 is not rendered (point out of extent) (105 KB) Jochen Huber, 2016-09-26 03:38 AM


#1 Updated by Giovanni Manghi about 7 years ago

  • Easy fix? set to No
  • Regression? set to No

#2 Updated by Giovanni Manghi over 5 years ago

  • Resolution set to end of life
  • Status changed from Open to Closed

End of life notice: QGIS 2.18 LTR


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