[OpenLayers-Users] couple of hopefully quick OpenLayers questions

[Ed Fialkowski]

Hi all, we just started using OpenLayers as an alternative to googlemaps for
a web application we are making.  This application is used for comparing two
sets of gridded data and displaying the result visually.

So, my questions:
1. Is there a way to set the Bbox for a WMS.Untiled layer?  As far as I can
tell the entire world is always queried.  Some of our sets use only North
American data and loading the entire world takes too long.  If this takes
writing my own WMS.custom layer, that's fine, but even looking at the custom
WMS classes I just can't find where the max Bbox is set.

2. Adding an overlay:  Is it possible to set the overlay transparent?  In my
WMS request url,  if I had the transparent=true flag, most of the image
comes back black but it is still not transparent at all.  The black totally
covers up the baseLayer.


If anyone has any questions  about what I'm asking, I will respond ASAP.
Any suggestions at all are greatly appreciated.

Thanks in advance!
-Ed
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