[Users] Base Map Layers all get loaded on map load

[Andreas Hocevar]

Hi,

there is a simple explanation for what you were experiencing, assuming 
that you are using OpenLayers 2.8: the Google Layer has changed since, 
only creating one shared GMaps instance for all Google layers. This is 
why you only see one layer being loaded in the OpenLayers google 
example. In OpenLayers 2.8, one GMaps instance was created for every 
Google layer, and this is why you see tiles being loaded in your 
application.

Regards,
Andreas.

Dan Ramage wrote:
> I am not sure if this is an issue with GeoExt and the gx_mappanel, Mapfish,
> or something else I've done, but as the Subject says when my map is first
> loaded more than initial base map is loaded.
> 
> I think I am triggering the load of the other base map layer when I build my
> layer tree. I've got 2 Google layers and one GeoTiff for base maps.
> 
> Doing some debugging, I've added a "loadstart" to the GeoTiff layer. This
> event is fired if I add my ExtJS TreePanel to the viewport. If I just create
> the TreePanel, but don't add it to the viewport, the layer is not loaded.
> This only seems to be happening with this one base map layer. 
> 
>  
> 
> Another oddity, and I am again not sure if this is a GeoExt or OpenLayers
> issue, is with the Google Layers. Looking at the openlayers example:
> http://openlayers.org/dev/examples/google.html
> 
> the net traffic shows only the Physical Map data is coming back. In my map,
> I get the Physical data as well as some queries for the regular Google
> Map/roads. There are just a few tiles for the road map, but I have no idea
> why those are getting requested.
> 
> The physical map requests have this format:
> http://mt0.google.com/vt/v=app.118
> <http://mt0.google.com/vt/v=app.118&hl=en&src=api&x=18&y=25&z=6&s=Galileo>
> &hl=en&src=api&x=18&y=25&z=6&s=Galileo
> 
> The "road map" seems to have this format:
> http://mt1.google.com/vt/lyrs=m@118
> <http://mt1.google.com/vt/lyrs=m@118&hl=en&src=api&x=35&y=50&z=7&s=Gal>
> &hl=en&src=api&x=35&y=50&z=7&s=Gal
> 
>  
> 
> My site is here: http://carolinasrcoos.org/carolinasrcoos.html
> 
>  
> 
> I am not sure if the two issues are related at all, however I appreciate any
> feedback.
> 
>  
> 
>  
> 
> Dan
> 
> 
> 
> 
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.