[MapProxy] Dealing with a source with multiple resolutions in one layer

[Paul Norman]

How did you set up the layer that combined all of them?

 

Also, when you say you set up a cache for the detailed area, how did you
specify the extent of the detailed area? I don't see anything in the caches
docs about specifying coverage.

 

From: mapproxy-bounces at lists.osgeo.org
[mailto:mapproxy-bounces at lists.osgeo.org] On Behalf Of Benjamin Wragg
Sent: Tuesday, August 07, 2012 1:24 AM
To: mapproxy at lists.osgeo.org
Subject: Re: [MapProxy] Dealing with a source with multiple resolutions in
one layer

 

 

Hi Paul,

 

I think I had a similar setup problem the other day on this thread "Dealing
with a source with multiple resolutions in one layer". I had 1 source of 19
levels that I wanted to cache at 8 levels all over and then greater levels
over certain regions.

 

Basically to get it to work I did the following:

1.	setup 1 source which had a grid that encompassed the whole earth e.g
GLOBAL_MERCATOR with the maximum number of levels set, for me this was
num_levels 19.
2.	setup 1 cache for the whole earth with a grid of GLOBAL_MERCATOR
with num_levels 8
3.	setup a second cache for "detailed area 1" with a grid of
GLOBAL_MERCATOR with num_levels 14.
4.	setup a third cache for "detailed area 2" with a grid of
GLOBAL_MERCATOR with num_levels 1
5.	....another cache for each area I want more than num_level 8.
6.	In my seed.yaml I have a coverage defined for each of the above
areas and a seed that pre-caches each coverage.

 

Does that make sense? Hope it helps..

 

Regards,

 

Benjamin Wragg

 

On 06/08/2012, at 11:05 AM, Paul Norman <penorman at mac.com> wrote:





I run mapproxy to cache several WMS layers and convert them to TMS. Normally
I set up a layer, a cache using a grid with an appropriate num_levels for
the resolution of the source and a WMS source.

I've run into the case where one of the WMS layers is composed of multiple
imagery shots at different resolution. I would like to cache up to level 21
(zoom 20 in google-style numbering) for parts of it and to 19 in other
parts.

Is this possible? I can get polygons representing the extents of each part
of the layer.

If I use the same grid for the entire area then it could end up caching
unnecessary data in the lower-resolution areas.

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