<div dir="ltr">Hi Peter,<br><div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Jun 29, 2014 at 9:35 AM, Peter Aldhous <span dir="ltr"><<a href="mailto:peter@peteraldhous.com" target="_blank">peter@peteraldhous.com</a>></span> wrote:<br>
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<div>Yes, on my system the problem also
resolves on zooming - although I'd only use Robinson for a global
view.<br>
<br>
However, I have no problem with Google Mercator. <br>
<br>
Would really like to know how to fix this!<br><div class=""></div></div></div></blockquote><div><br></div><div>Try turning off 'Simplify geometry' for the layer (in layer properties) [0]. For new projects, not existing ones, the default behavior in QGIS 2.4 can now be controlled by a checkbox in Options -> Rendering (I think it's the Rendering tab, not at a computer right now). Then, you can selectively turn it on for layers where simplification would help speed up rendering.<br>
<br>[0] <a href="http://gis.stackexchange.com/a/100333/6725">http://gis.stackexchange.com/a/100333/6725</a><br><br></div><div>Regards,<br><br>Larry Shaffer<br>Dakota Cartography<br>Black Hills, South Dakota<br></div><div>
<br> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><div><div class="">
<br>
<div>Peter Aldhous, PhD<br>
Science journalist<br>
Contributor, <a href="https://www.medium.com/matter" target="_blank">MATTER</a><br>
phone: <a href="tel:415%20800%203471" value="+14158003471" target="_blank">415 800 3471</a><br>
cell: <a href="tel:415%20503%207323" value="+14155037323" target="_blank">415 503 7323</a><br>
email: <a href="mailto:peter@peteraldhous.com" target="_blank">peter@peteraldhous.com</a><br>
web: <a href="http://www.peteraldhous.com/" target="_blank">www.peteraldhous.com</a><br>
twitter: <a href="https://twitter.com/paldhous" target="_blank">@paldhous</a><br>
<br>
</div></div><div><div class="h5">
On 6/29/14, 7:57 AM, Micha Silver wrote:<br>
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<blockquote type="cite">
<div>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)<br>
I also see that if you use the *spatialite database file* from
<a href="http://naturalearthdata.org" target="_blank">naturalearthdata.org</a> this problem disappears. You can switch to
other world projections with no problem.<br>
<br>
On 29/06/2014 16:59, Peter Aldhous wrote:<br>
</div>
<blockquote type="cite">
<div>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<br>
<br>
<div>Peter Aldhous, PhD<br>
Science journalist<br>
Contributor, <a href="https://www.medium.com/matter" target="_blank">MATTER</a><br>
phone: <a href="tel:415%20800%203471" value="+14158003471" target="_blank">415 800 3471</a><br>
cell: <a href="tel:415%20503%207323" value="+14155037323" target="_blank">415 503 7323</a><br>
email: <a href="mailto:peter@peteraldhous.com" target="_blank">peter@peteraldhous.com</a><br>
web: <a href="http://www.peteraldhous.com/" target="_blank">www.peteraldhous.com</a><br>
twitter: <a href="https://twitter.com/paldhous" target="_blank">@paldhous</a><br>
<br>
</div>
On 6/29/14, 6:54 AM, Peter Aldhous wrote:<br>
</div>
<blockquote type="cite">
Hi all,<br>
<br>
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.<br>
<br>
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:<br>
<br>
Any idea what might be going on, and how to fix it?<br>
<br>
Thanks,<br>
<br>
<br>
<div>-- <br>
Peter Aldhous, PhD<br>
Science journalist<br>
Contributor, <a href="https://www.medium.com/matter" target="_blank">MATTER</a><br>
phone: <a href="tel:415%20800%203471" value="+14158003471" target="_blank">415 800 3471</a><br>
cell: <a href="tel:415%20503%207323" value="+14155037323" target="_blank">415 503 7323</a><br>
email: <a href="mailto:peter@peteraldhous.com" target="_blank">peter@peteraldhous.com</a><br>
web: <a href="http://www.peteraldhous.com/" target="_blank">www.peteraldhous.com</a><br>
twitter: <a href="https://twitter.com/paldhous" target="_blank">@paldhous</a><br>
<br>
</div>
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<br>
<br>
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<br>
<pre cols="72">--
Micha Silver
GIS Consulting
052-3665918
<a href="http://www.surfaces.co.il" target="_blank">http://www.surfaces.co.il</a>
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