https://bugs.kde.org/show_bug.cgi?id=375469
Bug ID: 375469
Summary: Polygon ruler: displayed values of area in km² are
huge for non-convex polygons
Product: marble
Version: 2.1 (KDE Applications 16.12)
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: marble-b...@kde.org
Reporter: kdemar...@dontsendmespam.de
Target Milestone: ---
Created attachment 103606
--> https://bugs.kde.org/attachment.cgi?id=103606&action=edit
Screenshot: perimeter 70 m, area 255 million km²
When you add measure points such that the area enclosed by the route along the
points is not convex, then the area is not calculated (or displayed) correctly.
It seems that there are "negative" areas, but the little info box does only
show unsigned values of roughly 255 million km².
Steps to reproduce:
Place three measure points like in "N" oder "Z".
(It works for any odd number of points on a zig-zag-line as well.)
Easy solution: allow negative values and let the user know that 255 million is
actually a miscalculation
Best regards,
Mario Holldack
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