[mapserver-users] FlatGeoBuf access (and WFS output) steps in MapServer

[Lars Schylberg]

Thanks Jeff,

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. I must continue now to optimize my mapfiles 
tomorrow. Generally, I am very pleased with the FlatGeobuf files in 
Mapserver so far.

/Lars Schylberg

Den 2022-04-25 kl. 21:32, skrev Jeff McKenna:
> Hi all,
>
> 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): https://mapserver.org/input/vector/flatgeobuf.html
>
> 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 ( 
> https://mapserver.org/optimization/vector.html )
>
> 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:
>
>   Shapefile  0.011s
>   FlatGeobuf 0.014s
>   GeoPackage 0.042s
>   SpatiaLite 0.045s
>   PostGIS    0.053s
>   GeoJSON    0.089s
>
> 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.
>
> Thanks,
>
> -jeff
>
>
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