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<p>Thanks Jeff,</p>
<p>This is very useful information. I have been experimenting with
FlatGeobuf for the last couple of weeks, but I missed the part
about setting verify buffer to No. <span class="s">I must
continue now to optimize my mapfiles tomorrow.</span> <span
class="s">Generally, I am very pleased with the FlatGeobuf files
in Mapserver so far.</span></p>
<p> /Lars Schylberg</p>
<div class="moz-cite-prefix">Den 2022-04-25 kl. 21:32, skrev Jeff
McKenna:<br>
</div>
<blockquote type="cite"
cite="mid:f7a18c28-d59a-aa0f-3bfc-23f61ef47caa@gatewaygeomatics.com">Hi
all,
<br>
<br>
I've spent some effort to document how to enable the optimized
FlatGeobuf (FGB) format for vectors in MapServer, for both
reading/access as well as steps to output FGB through WFS (you
could also use these same steps for WMS GetFeatureInfo output of
FGB as well): <a class="moz-txt-link-freetext" href="https://mapserver.org/input/vector/flatgeobuf.html">https://mapserver.org/input/vector/flatgeobuf.html</a>
<br>
<br>
The user community might be interested also in some performance
testing that I've done with FlatGeobuf with MapServer (hardcore
developers might question my exact methods, but for general users
these results should be interesting). I've added the results as a
note in the Vector Optimization document (
<a class="moz-txt-link-freetext" href="https://mapserver.org/optimization/vector.html">https://mapserver.org/optimization/vector.html</a> )
<br>
<br>
I used shp2img/map2img to test the map drawing speed for a few
popular vector formats (note that these are averaged times, and
are not done on a cold connection), with the latest MapServer
8.0-dev code on Windows through MS4W:
<br>
<br>
Shapefile 0.011s
<br>
FlatGeobuf 0.014s
<br>
GeoPackage 0.042s
<br>
SpatiaLite 0.045s
<br>
PostGIS 0.053s
<br>
GeoJSON 0.089s
<br>
<br>
The point is not to cause controversy or start analyzing my simple
testing methods, but instead to generally show how optimized
FlatGeobuf is for rendering (and filtering) in MapServer, and that
we should all be considering this format for sharing vectors
through our MapServer services.
<br>
<br>
Thanks,
<br>
<br>
-jeff
<br>
<br>
<br>
</blockquote>
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