Bug report #15116
Bad interpretation of CircularString representing full circle
|Affected QGIS version:||master||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||23058|
Currently for a CircularString(p0,p1,p2) where p0 == p2, QGIS considers p1 to be the center of the circle, whereas GDAL and PostGIS follow ISO SQL/MM Part 3 which says that the center of the circle is the midpoint of [p0,p1]. It would be good for QGIS to align on GDAL & PostGIS for interoperability through exchanges of WKT/WKB geometries.
Discussion thread : https://lists.osgeo.org/pipermail/qgis-developer/2016-June/043416.html