[Qgis-developer] shapefile clipping behavior in qgis revision 13903

[Martin Dobias]

Hi Jim,

I am unable to replicate your problem with 1.5.0 (r13916). To my
knowledge, there are no clipping settings and the behavior you
describe is simply wrong. Are you able to replicate your problem at
any other machine/platform?

Regards
Martin

On Sun, Jul 11, 2010 at 12:46 AM, Jim Hammack <hammack at gotslack.org> wrote:
> I am using QGIS to display oil spill extents and tropical weather in the
> Gulf of Mexico. I've found that since I moved from 1.4.0 to 1.5.0
> (rev 13903) that the clipping behavior has changed, and not in a good
> way! (This may have happened much earlier than rev 13903, but I
> haven't been keeping up with the latest revisions.)
>
> It seems now that if any portion of a shapefile falls outside the view,
> the entire shapefile is omitted from the display instead of just being
> clipped at the edges of the window.
>
> It's hard to explain so I've posted sample images at
> http://gotslack.org/qgis/shapefiles
>
> oil_zoom_out_again.png shows state boundaries, oil spill extents and
> emergency fishing closures. In oil_zoom_out.png the zoom level has
> changed, but I did not change the layers at all. You can see that the
> emergency fishing closure polygon and several state boundaries were not
> plotted.
>
> In oil_south.png I have panned to show the oils spill extent and the
> fishing boundary, but the state boundaries are not plotted. As I pan up
> to oil_center.png, state boundaries and the fishing extents are not
> plotted because they all fall partially outside the window. Panning up
> to oil_north.png shows the oil extent and only one state boundary is
> plotted because portions of the other states and the fishing boundary
> fall outside the window.
>
> I don't think this is the behavior we want and I'm hoping that this is
> simply a configuration item that I have not been able to find.
>
> Can anyone confirm that this is the expected behavior? Is there a way
> to configure the project such that clipping is performed as it was in 1.4.0?
>
>                   Thanks,
>                      Jim
>
>
>
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