[mapserver-users] MapCache with GTiff Cache

[thomas bonfort]

Arthur,

The TIFF cache backend is efficient and performant, however it is not easy
or flexible to setup. Basically you *must* ensure that the provided TIFFs
are exactly aligned to your mapcache grid, and this for every zoom level
you want to serve.
I would suggest you create a TIFF cache from scratch on the "test"
datasource , by enabling tiff write support in mapcache. Once you have
browsed/seeded a few layers, the structure of what mapcache is awaiting
given the <template> you provide will hopefully be clearer.

Remove the <base> from your tiff source, use only the <template> and give
it a full path, e.g.
 <template>/path/to/tiff-cache/{tileset}/{grid}/L{z}/R{inv_y}/C{x}.tif</template>

Please submit a patch to the docs if you think they should be enhanced.

--
thomas



On 25 April 2013 17:41, Arthur Wesley <arwesley at web.de> wrote:

> Hello Mapserver-Community, Hello List,
>
> first of all i want to thanks for the great work you guys are doing. The
> mapserver-project with all his facets does really deliver a great range of
> useful tools and services for different questions.
>
> Right now i am looking for a WMS and WMTS solution for publishing big
> amounts of high resolution tiffs. Because of concerns about our disk
> storage i would like to use only a single  raster datastore for both
> services, i.e. WMS and WMTS.
>
> The realization of a WMS Service in front of a tiff datastore is no
> problem with mapserver / mapfile. For the realization of a WMTS solution i
> set up the extension mapcache. I also got it running as disk cache
> solution. But i want to try if it is possible to set up it in front of the
> tiff datastore. As it says in the documentation (
> http://mapserver.org/mapcache/caches.html#mapcache-cache-tiff) it is
> possible to use a gtiff cache, but right now i didn't get it running (see
> my mapcache.xml in annex). Also i don't have real knowledge about the
> structure of the tiff store for mapcache. As far as  i know gdal gives me
> with the tools gdal2tiles and gdal_retile/gdaltindex two tools for
> computing a tile structure. Could such a structure reused or do i have to
> use another structure? Anyway i am quit new to tiling storys, so maybe i
> just don't get it.
>
> It would be nice if somebody could show me mapcache.xml example for a tiff
> cache and maybe could also descripe the needed structure of the tiff store.
> I really appreciate your help. Thanks in advance.
>
> Kind regards,
>
> JM
>
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