[Qgis-user] QGIS hanging and bad shapefile export

[Gavin Fleming]

I'm continuing this thread as the problem seems related:

QGIS hangs on zooming close into polygon layers. We experience the
problem on 2 PCs running Win XP. QGIS has been doing this for several
versions, including now 1.2. The number of zooms or the extent of the
zoom might vary but every time it hangs (or takes and EXTREMELY long
time to zoom) when zoomed in close. This makes it extremely frustrating
if not impossible to do detailed work such as editing. And it happens
with shapefiles and PostGIS layers.

The problem does not present in QGIS 1.0.0 on Ubuntu. Seeing Marco's
answer below to a similar problem (zooming to a selected table record)
it seems like the common factor might be XP.

This should be tested and fixed on XP as it is still widely used,
especially on systems with ArcGIS as ArcGIS (9.2 at least) doesn't run
on Vista, so this bug could a major impact on QGIs acceptance for people
running dual or transition environments. 

Gavin Fleming 

Also posted at
http://forum.qgis.org/viewtopic.php?f=2&t=4936&p=8628#p8628 

-----Original Message-----
From: Marco Pasetti [mailto:marcopstt at gmail.com] 
Sent: 2008 September 10 11:36
To: Gavin Fleming; qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] QGIS hanging and bad shapefile export

Hi Gavin,

>Two problems have been occurring regularly in QGIS (0.11 on XP)

>Open attribute table, select one or more records, click 'Zoom to
selected 
>records' - QGIS hangs.

I tested it on my notebook running Windows Vista Home Premium (where the

releases of QGIS and GRASS for MS-Windows are built and packaged).

After loading a shapefile I quickly zoomed on selected records from the 
attribute table; no bugs reported.
I tested the same thing loading a GRASS vector layer: same result, no 
problem at all.

I guess it's a specific XP problem, but, at the moment, I don't have an
XP 
machine to test on.

>Export as shapefile (PostGIS layer): ArcGIS does not recognise the
extent 
>of the shapefile and will not draw it, though attributes are
accessible. If 
>you then export it as a shapefile again >from within ArcGIS, the output

>shapefile is fixed and draws fine. Is this a PostGIS / shapelib / QGIS 
>problem? What's the fix?

I'm afraid, I don't have ArcGIS (nor any ESRI product, actually).

Regards,

Marco 

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