[MapProxy] Reprojection Question

[Oliver Tonnhofer]

Hi,

> On 29.08.2017, at 19:12, Napoleon, Dominic <dominic.napoleon at rgi-corp.com> wrote:
> 
> Suppose I attempt to seed from one cache to another.  If both caches have identical or near identical grids (tile resolution, tile size, epsg, etc...) then no reprojection is required. In my scenario, will MapProxy reproject anyways, or will it realize that reprojection will result in little to no change, and skip the reprojection step (resulting in CPU/GPU power savings?


It will do the minimum required. Either a simple crop, a rescaling or a reprojection. Reprojection will even improve with 1.10 (https://github.com/mapproxy/mapproxy/commit/e1a184bf0a1acff09e6053c35e6ebca340931492)


You could even get better results by using meta_size: [1, 1] and meta_buffer: 0 on your second cache. With this, MapProxy will directly load tiles from the first cache (But this depends on the actual configuration).

Regards,
Oliver

-- 
Oliver Tonnhofer  | Omniscale GmbH & Co KG  | https://omniscale.com
OpenStreetMap WMS and tile services         | https://maps.omniscale.com