Merge several layers into a single multi-layer GetMap request

[J. Parapar]

Thanks! Here it is: http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1516

Jorge

2005/11/3, Yewondwossen Assefa <assefa at dmsolutions.ca>:
> Yes Please do so and I will update the code.
>
> Later,
>
> J. Parapar wrote:
> > 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
> >>----------------------------------------------------------------
> >>
> >>
> >
> >
> >
>
> --
> ----------------------------------------------------------------
> Assefa Yewondwossen
> Software Analyst
>
> Email: assefa at dmsolutions.ca
> http://www.dmsolutions.ca/
>
> Phone: (613) 565-5056 (ext 14)
> Fax:   (613) 565-0925
> ----------------------------------------------------------------
>
>