James and others, I have also had requests for this off-list, but am somewhat weary to implement this. Firstly, this goes against the concept that mapcache is a *cache*, although I do clearly understand why/when this could be needed. Secondly, there's a whole lot of logic that treats the "metatile" problem that would need to be overridden or worked around in that case (as we would not want to send a full metatile request to the WMS server, but only the extent for a single tile. This would need to be accounted for rather early as multiple incoming requests are synchronised/paused while waiting for the same metatile). This is an issue that doesn't scratch any of my itches, so I will probably not be adding it without any incentive, even more so that there are some workarounds available as pointed out by Andreas and Armin. I would also add that rather than implementing this straightforwardly, I would prefer having the possibility of having multiple caches per tileset, depending on the zoom level, so that e.g. high zoom level tiles could be stored to a volatile memcache backend that automatically does the pruning, thus avoiding the metatile issues completely.
regards, thomas On 24 November 2013 16:57, James_in_Utah <[email protected]> wrote: > Hi, > I'm trying to configure mapcache (from latest dev version of MS4W) and would > like to cache the first couple of zoom levels of a very large set of USDA > NAIP imagery. I've tried using the minzoom and maxzoom tags in the tileset, > like this: > <grid restricted_extent="-180 -90 180 90" minzoom="1" > maxzoom="6">WGS84</grid> > but once I zoom below the maxzoom value I get no imagery. I would like it > to send the request to the source if it is beyond the maxzoom value. Is > there a way to do this? > Thanks, > James > > > > > -- > View this message in context: > http://osgeo-org.1560.x6.nabble.com/MapCahe-question-Caching-the-first-couple-of-zoom-levels-tp5090882.html > Sent from the Mapserver - User mailing list archive at Nabble.com. > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
