[mapserver-users] mapserver / mapcache performance when reprojecting many

[Travis Kirstine]

Mark
See: https://mapserver.org/input/raster.html#raster-display-performance-tips
In summary use internally tiled geotiffs with overviews using gdaladdo in
the projection you'd like to publish from mapserver





On Mon, 13 Jul 2020 at 17:14, Mark Volz <MarkVolz at co.lyon.mn.us> wrote:

> Hi,
>
>
>
> I was able to increase the performance of my reprojected service by
> resampling the raster.   If anyone else has any tips please let me know.
>
>
>
> Thank You
>
> Sincerely,
>
> *Mark Volz, GISP*
>
>
>
> Hello,
>
> I created a Mapserver / Mapcache service that uses a tile index with about
> 1,000 jpg file.  When I use my counties native projection the service is
> quite fast especially when compared to using MrSID mosaics.  However, when
> I reproject my imagery to EPSG: 3857 the service much slower than my older
> MrSID service.  I presume this may have something to do with Mapserver
> needing to load and reporject all the tiles.
>
>
>
> Please let me know if you have any tips that could help speed up the
> service.  Here are a couple things I thought of:
>
>
>
> *         Just use MrSID mosaics which will provide mediocre performance
> in the source projection, but may be faster when reprojecting.
>
>
>
> *         Convert the data into a geotiff format which will take time.
>
>
>
> *         Use MrSID files at smaller scales, and Jpeg tiles at larger
> scales.  This should give us acceptable speed, but we will need to store
> more data.
>
>
>
> *         Something else.
>
>
>
> Thank You!
>
>
>
> Sincerely,
>
> Mark Volz, GISP
>
>
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