Thanks, Andrea. I suspected this might be the cause of the issue.
Is there a way to view the scale computed for a map request? That might
let us correlate the client (geodetic) scale to "OGC scale", so we can
translate between the two.
On Tue, Feb 16, 2016 at 12:40 AM, Andrea Aime <andrea.a...@geo-solutions.it>
wrote:
> On Tue, Feb 16, 2016 at 12:05 AM, Martin Davis <mtncl...@gmail.com> wrote:
>
>> 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?
>>
>
> The OGC standard basically defines (brace yourself) an "cylindrical earth"
> model in the SLD specification, that's what GeoServer implements, at least
> for
> geographic coordinate systems.
> For projected ones it's the "flat map" scale one, measured in the
> projected coordinates, which is also very far away from a true scale
> (measured along a geodetic distance) especially at those latitudes
> and using that projection.
>
> If you really want to break the standards GeoServer gives you a hand by
> offering a vendor param to compute the scale
> in the accurate (geodetic) way:
>
> http://docs.geoserver.org/latest/en/user/services/wms/vendor.html#scalemethod
>
> We normally use that for printouts :-)
>
> Cheers
> Andrea
>
> --
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