Are you suggesting that GeoServer computes the scale at a single known
point for all map request extents, no matter where on the globe they are
located? Does the OGC standard specify this?
If so, I guess that might explain the discrepancy between SLD scale and
true image scale, at our latitudes (49 to 60) ?
On Mon, Feb 15, 2016 at 2:35 PM, Rahkonen Jukka (MML) <
[email protected]> wrote:
> Hi,
>
>
>
> I am not sure if I understood the problem but I wonder how the true scale
> suits together with Web Mercator. I guess that you do not expect that the
> tiles of the same zoom level would use different styles at equator than in
> Canada or Finland even the true scale differs a lot.
>
>
>
> -Jukka Rahkonen-
>
>
>
> Martin Davis wrote:
>
>
>
> We are displaying map images in Web Mercator, from a GeoServer with native
> CRS as BC-Albers (EPGS:3005).
>
>
>
> We are using an OpenLayers client to display the map images. We have
> confirmed that the geodetic scale displayed by OpenLayers is approximately
> the true scale of the map images (modulo the fact that OL uses a fixed
> resolution of 72 DPI).
>
>
>
> Based on the zoom levels at which layers become visible, it appears that
> GeoServer's internal computed scale is from 2 to 4 times larger than the
> client scale.
>
>
>
> Is this expected?
>
>
>
> Is there any way to determine a way to map between client scale and
> Geoserver scale, so that we can configure the client to track GeoServer
> visibility faithfully?
>
>
>
> Is there any way to display the internal GeoServer scale to make it
> possible to confirm if this analysis is correct?
>
>
>
>
>
> GeoServer ver 2.6 (although I believe this is happening in 2.8 as well)
>
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