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

[Andreas Hocevar]

Hi Dan,

please create a ticket for GeoExt. From your descriptions, it seems that 
the fixed Google layer issue and the issue with loading your GeoTiff 
layer in GeoExt when the tree gets rendered are not related.

Andreas.

Dan Ramage wrote:
> Andreas,
> 
> Before I do that, let me clarify as I think Openlayers has resolved the
> issue. In the openlayers example for V2.8 here:
> http://dev.openlayers.org/releases/OpenLayers-2.8/examples/google.html the
> issue is the same thing I see.
> However in the development version here:
> http://openlayers.org/dev/examples/google.html the issue has been resolved.
> So I don't think there would be a need to open up a ticket would there?
> 
> Dan
> 
> -----Original Message-----
> From: Andreas Hocevar [mailto:ahocevar at opengeo.org] 
> Sent: Tuesday, February 23, 2010 2:49 PM
> To: Dan Ramage; GeoEXT Users
> Subject: Re: [Users] Base Map Layers all get loaded on map load
> 
> Dan Ramage wrote:
>> Andreas,
>>
>> I went and test the Release 2,8 version of that OpenLayers example and it
>> has the same issue I see, thanks for the feedback.
> 
> Can you please create a ticket and upload a stripped down test case / 
> example that shows the issue?
> 
> Thanks,
> Andreas.
> 
>> Dan
>>
>> -----Original Message-----
>> From: Andreas Hocevar [mailto:ahocevar at opengeo.org] 
>> Sent: Wednesday, February 24, 2010 1:02 PM
>> To: Dan Ramage
>> Cc: 'GeoEXT Users'
>> Subject: Re: [Users] Base Map Layers all get loaded on map load
>>
>> 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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>>> Users at geoext.org
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>>
> 
> 


-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.