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<p class=MsoNormal><span style='color:#1F497D'>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>There were no negative votes on
this motion.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>This motion is adopted.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks everyone for providing
input.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Orest.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Orest
Halustchak<br>
<b>Sent:</b> Monday, September 07, 2009 9:33 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> [fdo-internals] Motion: Vote on FDO RFC 38 - SHP multi-polygons<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:#1F497D'>Hi,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>There were no further comments
on this RFC:</span> <a href="http://trac.osgeo.org/fdo/wiki/FDORfc38">http://trac.osgeo.org/fdo/wiki/FDORfc38</a>
- Multi-polygon support for SHP.<o:p></o:p></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I would like to motion a vote to
accept this RFC.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Orest.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
fdo-internals-bounces@lists.osgeo.org
[mailto:fdo-internals-bounces@lists.osgeo.org] <b>On Behalf Of </b>Orest
Halustchak<br>
<b>Sent:</b> Thursday, August 27, 2009 4:50 PM<br>
<b>To:</b> FDO Internals Mail List<br>
<b>Subject:</b> [fdo-internals] Back to FDO RFC 38 - SHP multi-polygons<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Regarding: <a href="http://trac.osgeo.org/fdo/wiki/FDORfc38">http://trac.osgeo.org/fdo/wiki/FDORfc38</a>
- Multi-polygon support for SHP.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoPlainText>In our last discussions on this RFC, there was concern
about performance impact.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Dan has done some prototype performance testing to
determine the impact of this proposed change. He used some datasets that
included complex multi-polygons including Norway data and Australia data that
had detailed multi-polygons for all the islands (100’s of loops for each feature).
Following are some statistics with before and after timings. With each of these
datasets, the time to render on the screen was much longer than these load
times and there is no difference that an end user would see in these cases. <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Australia: 9 multipolygon features with 3 of them having
between 800 and 900 polygon loops each, others averaging about 100 loops each.<o:p></o:p></p>
<p class=MsoPlainText> .015 seconds to .125
seconds<o:p></o:p></p>
<p class=MsoPlainText>Europe: 54 multipolygon features with Norway having 862
loops, with others of 653, 509, 359 loops, and the rest averaging about 100
loops each.<o:p></o:p></p>
<p class=MsoPlainText> .016 seconds to .17
seconds<o:p></o:p></p>
<p class=MsoPlainText>Queensland parcels: 2,000,000 polygons<o:p></o:p></p>
<p class=MsoPlainText> Unchanged at 1.6 seconds<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>So, yes it takes longer to process, but the overall
timings are still sub-second for the complex cases. There is also no impact on
cases of regular polygons.<o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoNormal>Dan will be back from his vacation soon and will be able to
do the implementation. So, I’d like to get to a vote on this if nobody has
objections.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal>Orest.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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