On Mon, Sep 29, 2014 at 9:58 AM, Rahkonen Jukka (Tike) <
[email protected]> wrote:
> I have not thought thoroughly but my feeling is that WMS clients should
> not care about advertised BBOXes but that is probably because I run
> Mapserver which believes whatever layer extents I manually write into the
> mapfile and they are systematically inaccurate and often totally wrong, I
> fear. WMS servers send empty maps very fast if WMS client is sending BBOX
> which is outside the data area. However, I can imagine that sometimes, for
> some servers, there can be more trouble if client is sending a BBOX-SRS
> combination that does not work because re-projection with those values is
> impossible.
>
Hi Jukka,
the main reason to guess the native SRS is just an accuracy one, most
GeoServer clients pick the first bbox we publish as the native
one, and if that is correct, you get less distortion in your output, either
because you're doing less resampling operations on your
raster data, or for vector data, because you're avoiding potential datum
shifts that can also incur in severe errors.
The second one is of course the convenience, in Tore's case he's not
getting the full bbox in the form by default, but just half of it
Cheers
Andrea
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