WMS - Reprojecting and losing transparency?

[Pete Giencke]

Frank,

Thanks for confirming my suspicions; I'll dispatch a bug report right away... It
looks like the only option until that gets resolved is to use static, projected
rasters (boring!).

-pete

PS Sorry about the two ENDS, i hastily ripped that code from my actual mapfile.

Quoting Frank Warmerdam <fwarmerdam at gmail.com>:

> On 9/6/05, Peter Giencke <pgiencke at glc.org> wrote:
> > Hi,
> >
> > Am I right to assume that under in the following circumstance, a
> > 'reprojected' wms layer will lose its transparency? I did some digging and
> > couldn't find a straight answer...
> >
> > Below is a parred down version of the mapfile I'm using; it becomes
> > untransparent after the projection to UTM. Hopefully I'm wrong and there's
> a
> > way to do this....
>
> Peter,
>
> I gather the problem you are running into is that the TRANSPARENT 40
> keyword for the layer is being ignored, right?  Does this really work if
> there is no reprojection?  Looking at the code, it seems that
> msDrawMap() completely skips msDrawLayer(), and calls
> msDrawWMSLayerLow() directly for WMS layers.  This means all the
> msDrawLayer() code for handling layer level transparency is ignored.
>
> I would suggest you submit a bug for the WMS client layer implementators
> to address (Assefa and Daniel).
>
> PS. You have two ENDs at the end of your first PROJECTION block.
> It took me quite a it of work to figure out why the mapfile didn't
> seem to render anything!
>
> Best regards,
> --
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
>