Bug report #13863: Complex Polygon not displayed on screen if it can not be displayed entirely - QGIS Application - QGIS Issue Tracking

Bug report #13863

Complex Polygon not displayed on screen if it can not be displayed entirely

Added by Yorck Neumann about 9 years ago. Updated over 5 years ago.

Status:	Closed
Priority:	Normal
Assignee:	-
Category:	Vectors
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:	end of life
Crashes QGIS or corrupts data:	No	Copied to github as #:	21886

Description

Hi, this issue may be somehow related to #13862.

This compley polygon with "cut outs" will only be displayed on screen is it does entirely fit the screen. If the focus is moved in a way that the polygon is partially moved over the screens borders, it will not be displayed anymore.

Attached 2 screenshots + the shp-files.

Many thanks for solving this issue!

visible.PNG (961 KB) Yorck Neumann, 2015-11-21 12:58 PM

not_visible.PNG (761 KB) Yorck Neumann, 2015-11-21 12:58 PM

polygon.zip (12 KB) Yorck Neumann, 2015-11-21 12:58 PM

Related issues

History

#1 Updated by Giovanni Manghi almost 9 years ago

Target version deleted (~~Version 2.14~~)
Category changed from Map Canvas to Vectors
Status changed from Open to Feedback
Affected QGIS version changed from 2.12.0 to master
Operating System deleted (~~Win 10~~)
OS version deleted (~~1511~~)

this polygon has a nasty error,
if trying to import it in postgis I get

Creation error for features from #0 to #0. Provider errors was:
PostGIS error while adding features: ERROR: Polygon must have closed rings
CONTEXT: SQL function "st_geomfromwkb" statement 1

if you clean it, for example with the st_makevalid function with the

http://plugins.qgis.org/plugins/processinglwgeomprovider/

plugin, you get a vector without this issue.