[MapProxy] Confused about zoom levels when proxying Google Maps

[Paul William]

Hi Oliver, thanks for your quick response. I have throughly investigated
this and I believe you are absolutely correct. I think its an issue with
the client software.

Many thanks for the awesome software that you and Omniscale develop.




On Mon, Jul 28, 2014 at 11:09 PM, Oliver Tonnhofer <olt at omniscale.de> wrote:

> Hi,
>
> On 28.07.2014, at 12:32, Paul William wrote:
> > I am using MapProxy to proxy Google Maps into an application that
> supports WMS servers.
>
> Google does not permit that.
>
> > I am new at GIS software and confused by the zoom levels. For some
> reason, the MapProxy WMS server only serves up tiles to a maximum of
> Google's zoom level 17. If I use MapProxy Seed tool, I can cache tiles at a
> maximum of 19 (confirmed by look at the images in the cache).
>
> A request to
> http://localhost:8080/service?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=13.14797258431889126,52.41603517514587907,13.29055343492096775,52.51031994521477486&SRS=EPSG:4326&WIDTH=1792&HEIGHT=1185&LAYERS=gh_layer&STYLES=&FORMAT=image/png&DPI=72&MAP_RESOLUTION=72&FORMAT_OPTIONS=dpi:72&TRANSPARENT=TRUE
>
> makes requests to http://mt1.google.com/vt/lyrs=y&x=281376&y=172134&z=19,
> so that looks right.
>
>
> > I cannot zoom in as far as the data, regardless of what client I use.
> The MapProxy Demo (OpenLayers?) client has the same restriction.
>
> The demo client is limited and it is not configured automatically to use
> the right number of zoom levels.
>
> Regards,
> Oliver
>
> --
> Oliver Tonnhofer    | Omniscale GmbH & Co KG    | http://omniscale.com
> http://mapproxy.org | https://github.com/olt    | @oltonn
>
>
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