[OSGeo-Discuss] fastest option of serving huge imagery on web map on the fly

[Oliver Tonnhofer]

On 20.05.2010, at 22:10, miblon wrote:

> If mapserver is to slow, almost everything else is to slow... I also noticed your crosspost on the mapproxy list. mapproxy will even cache to more then the 60TB youve estimated, because it will cache every wms request instead of square, stitched tiles.

I don't understand that. MapProxy does cache square tiles and if 60TB are a valid estimate for TileCache and GeoWebCache, than this should also apply to MapProxy.

But, you don't want to cache everything in advance, that would be a waste of resources. Caching the lower resolutions, the common parts where more users will access the same images would take of the load of the WMS server.

Karsten mentioned OpenLayers, so i guess tiled services like TMS are an option. MapProxy, TileCache and GeoWebCache should all be able to handle that without caching in advance. MapProxy comes with full HTTP cache control, you can limit the resolution till images should be cached (other requests will be passed to the WMS) and if some clients require full WMS you can use MapProxy's WMS and benefit from the cached tiles. All points that are quite useful in this scenario.


Regards,
Oliver

-- 
Oliver Tonnhofer <olt at omniscale.de>
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