[QGIS-trac] [Quantum GIS] #1802: problem when using a geographic CRS after changing the central meridian

[Quantum GIS]

#1802: problem when using a geographic CRS after changing the central meridian
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   Reporter:  lutra                             |              Owner:  nobody       
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.2.0
  Component:  Projection Support                |            Version:  HEAD         
   Keywords:                                    |   Platform_version:               
   Platform:  All                               |           Must_fix:  Yes          
Status_info:  0                                 |  
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 Tested with both shapefiles and postgis.

 How to reproduce the problem:

 *) download this shapefile of the world borders
 http://thematicmapping.org/downloads/TM_WORLD_BORDERS-0.3.zip

 *) add it to your project

 *) add a custom CRS with the following definition (for example)
 "+proj=moll +lon_0=Central Meridian +x_0=False Easting +y_0=False
 Northing"

 *) in the project properties choose the just created CRS and activate OTFR

 *) the layer shows correctly

 *) now go to the CRS management and change the central meridian
 "+proj=moll +lon_0=90 +x_0=False Easting +y_0=False Northing"

 *) in the project properties change again to wgs84 and back again to the
 custom CRS, now the shape looks weird.

 *) if you zoom in enough the problem disappear

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1802>
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Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats