Re: [Qgis-user] reposting q on reprojection problem in QGIS 2.0

[Andre Joost]

Am 01.07.2014 14:48, schrieb Peter Aldhous:


Hi all,

Apologies for reviving this thread (below), but does anyone have a
solution other than using a different data format? I ask because I will
be do some teaching using QGIS and want to work with shapefiles for that.

This is a problem that's emerged for me only with recent versions of
QGIS, so something must have changed to cause the behavior. Might it be
at the level of GDAL?



A simple solution is to cut the data at 180°E/W.
I described  a detailed workflow for QGIS or GDAL here:


http://gis.stackexchange.com/questions/102009/convert-shapefiles-from-wgs84-to-miller-projection

HTH,
André Joost

___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/qgis-user

Re: [Qgis-user] reposting q on reprojection problem in QGIS 2.0

[Peter Aldhous]

Dear Andre,

Thanks for your reply. I was optimistic that this would work, but sadly
it does not. I've tried creating various polygons, and running either
clip or difference. Even if I cut the world shapefile 5 degrees away
from 180E/W, I'm still getting the bizarre trapezoid behavior on
reprojection to Robinson in QGIS.

ogr3ogr in the command line works fine, and there I don't need to clip,
the reprojection works and the shapefile loads perfectly in QGIS. So
this is fine for my purposes, but it does seem that something has gone
awry with reprojection in the latest version of QGIS for the Mac. Which
will be a shame when I come to teach it.

Best wishes,

Peter




Peter Aldhous, PhD
Science journalist
Contributor, MATTER https://www.medium.com/matter
phone: 415 800 3471
cell: 415 503 7323
email: pe...@peteraldhous.com mailto:pe...@peteraldhous.com
web: www.peteraldhous.com http://www.peteraldhous.com/
twitter: @paldhous https://twitter.com/paldhous
___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/qgis-user