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I can verify this same behavior on Win7
with QGIS 2.4 64b. I think it has to do with the shapes crossing
the 180º line. If you zoom in to a smaller area that includes only
countries in one hemisphere, the borders look OK. Also, it's not
only Robinson and Mollweide: any global projection will show
strange trapezoids (even "Google" mercator)
I also see that if you use the *spatialite database file* from
naturalearthdata.org this problem disappears. You can switch to
other world projections with no problem.
On 29/06/2014 16:59, Peter Aldhous wrote:
I don't think the image came through,
but the problem is that every polygon ends up as a trapezoid, so
I end up with a collection of overlapping trapezoids
On 6/29/14, 6:54 AM, Peter Aldhous wrote:
Hi all,
I'm using the KyngChaos install of QGIS on the Mac (Mavericks
and Lion, on different machines), and I've been having problems
with projections including Robinson and Mollweide from QGIS 2.2
onwards.
Everything was fine in QGIS 2.0, but in 2.2 and 2.4,
re-projecting a world Natural Earth shapefile to a Robinson
projection, for example, gives this:
Any idea what might be going on, and how to fix it?
Thanks,
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--
Micha Silver
GIS Consulting
052-3665918
http://www.surfaces.co.il
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