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<div class="moz-cite-prefix">Hi<br>
<br>
>ad issue 1: update fTools to warn users when some features
cause problems<br>
>ad issue 2: quick fix fTools to convert geometry collections
to single geometry types<br>
<br>
A function that takes a geometry type and extracts the longest
line / the largest polygon / the first point from the geometry
collection should be straightforward to do.<br>
<br>
>These fixes/updates would be made available as fTools updates
via the plugin installer asap<br>
<br>
If the fix does not take too long, we probably don't need a
warning at all.<br>
<br>
Regards,<br>
Marco<br>
<br>
On 23.11.2015 21:35, Anita Graser wrote:<br>
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<blockquote
cite="mid:CAFFV8FgYvYzu+eDGjiA90UtfkryMUHjs_dd9_soS4osRp2m5Ew@mail.gmail.com"
type="cite">
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<div class="gmail_default">Hi,</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">If you are following the psc list,
you've probably seen the thread discussing current
shortcomings of ftools (<a moz-do-not-send="true"
href="http://lists.osgeo.org/pipermail/qgis-psc/2015-November/003623.html">http://lists.osgeo.org/pipermail/qgis-psc/2015-November/003623.html</a>)</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">In short, the key issues are:</div>
<div class="gmail_default">1. When ftools encounter issues with
certain features, warning messages get written to the log but
this is largely hidden from users since they would actively
have to actively monitor the log. The problematic features are
then missing from the results but this is not always obvious. </div>
<div class="gmail_default">2. The above issue is more common now
(since 2.10) since underlying libraries more often (and
correctly so) produce geometry collections as outputs. These
geometry collections are not handled well by the current
ftools code which is much older.</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">To address these issues, the
following suggestions have been made so far: <br>
ad issue 1: update fTools to warn users when some features
cause problems<br>
ad issue 2: quick fix fTools to convert geometry collections
to single geometry types</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">For the warnings, there's already a
first PR draft <a moz-do-not-send="true"
href="https://github.com/qgis/QGIS/pull/2432">https://github.com/qgis/QGIS/pull/2432</a>
which needs to be fleshed out. </div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">These fixes/updates would be made
available as fTools updates via the plugin installer asap. </div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">If you have ideas how to handle this
efficiently or have already implemented code that addresses
similar issues, let us know. </div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">It would be good to have a quick
discussion in order to be able to provide improvements fast.<br>
</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">Best wishes,</div>
<div class="gmail_default">Anita</div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
Dr. Marco Hugentobler
Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
<a class="moz-txt-link-abbreviated" href="mailto:marco.hugentobler@sourcepole.ch">marco.hugentobler@sourcepole.ch</a> <a class="moz-txt-link-freetext" href="http://www.sourcepole.ch">http://www.sourcepole.ch</a>
Technical Advisor QGIS Project Steering Committee </pre>
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