Merge several layers into a single multi-layer GetMap request

[J. Parapar]

Hi Assefa, thanks for your time.

Looking at mapwmslayer.c, at the lines following those, it seems that
the parameters which are allowed to be different between the two
requests are LAYERS, QUERY_LAYERS and STYLES. The SLD_BODY parameter
is different in each request so the layers are not merged.

May I post a bug on this in http://mapserver.gis.umn.edu/bugs/?

Thanks again,
Jorge


2005/11/3, Yewondwossen Assefa <assefa at dmsolutions.ca>:
> Hi There,
>
>   I am nopt sure why would this happen. Cheking the code, the criteria
> for merging is the following (mapwmlalayer.c around line 927) :
>
>    if (!bForceSeparateRequest &&
>          lastconnectiontype == MS_WMS &&
>          psLastWMSParams != NULL &&
>          sThisWMSParams.numparams == psLastWMSParams->numparams &&
>          strcmp(sThisWMSParams.onlineresource,
>                 psLastWMSParams->onlineresource) == 0)
>
>     which translates into :
>
>        - no metadata set force_separate_request
>        - number of parameters are the same between 2 requests
> (parameters being all the manadatory and non manadory request parameters)
>        - the onlineresource should be the same.
>
>   Adding a wmss_sld_body would only end up adding one paramater. If all
> your consececutive layers follow these criterias, It shoudl merge.
>
>   Thinking about It and reading the doc, I am not sure why the number of
> parameters is added into the test.
>
> Later,
>
>
> J. Parapar wrote:
> > Hi all
> >
> > We have several wms layers with the same wms server in our mapfile
> > client and MapServer is making one GetMap request for each of the
> > layers. All the layers have the parameter wms_sld_body set to AUTO. In
> > some tests with layers without SLD MapServer do merges several layers
> > into a single multi-layer GetMap request. Does this optimization only
> > works with non SLD layers?
> >
> > Thanks in advance,
> > Jorge
> >
> >
>
> --
> ----------------------------------------------------------------
> Assefa Yewondwossen
> Software Analyst
>
> Email: assefa at dmsolutions.ca
> http://www.dmsolutions.ca/
>
> Phone: (613) 565-5056 (ext 14)
> Fax:   (613) 565-0925
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>