[OpenLayers-Users] Problems with scaling when Virtual Earth is the base layer?

[Erik Uzureau]

Hi Richard,

I have opened a ticket for this issue:

http://trac.openlayers.org/ticket/1689#preview

If anyone else has seen this issue or has some suggestions, please let
us know. Unless a patch
miraculously appears, this is going to be a 2.8 issue for now.

Thanks for the report!
Erik

On Mon, May 12, 2008 at 7:23 PM, Richard Marsden <richard at winwaed.com> wrote:
> I don't know if anyone has seen this, or know of a workaround, but I'm
> finding that if I zoom in too far with a Virtual Earth base layer, then
> the other layers are not plotted.
>
> Eg.
>
> http://www.ecomapcostarica.com/map/map_test_ve.shtml
>
> ( I've found problems when trying to switch base layers between
> MapServer WMS and Virtual Earth. It will switch from VE to MPS
> perfectly, but not back again. My solution was to have two pages: one
> for each base layer. The above page is the draft version of the VE page)
>
> The default zoom (also duplicated with the Leaves and Lizards zoom
> option) plots at the maximum zoom that works. What you see is a KML
> layer, on top of a raster image and a 'stream' vector layer (both from
> MapServer WMS). No VE should be visible, but if you pan to the north VE
> should be visible.
>
> In fact we're zoomed in too far and VE shows the "forbidden camera" icon
> indicating that  sufficiently detailed images are unavailable. This is
> to be expected. However if we zoom in one step further (eg. by scrolling
> the mouse wheel one click), then OpenLayers appears to 'hang' with the
> VE layer and does not show the other layers.
>
> This is actually quite limiting for this application, because virtually
> everything of interest will be plotted in the red KML polygon!
>
> So does anyone know of a workaround, eg. is it possible to make the VE
> base layer automatically appear and disappear when zoomed in very far?
>
> As an aside, the working non-VE version which uses public outline SHP
> data instead, can be seen here:
>
> http://www.ecomapcostarica.com/map/index.shtml
>
> We shall be in the field in two weeks time, and hope to update the
> map(s) whilst we're out there.  Yes Wifi has even reached the rainforest!!
>
>
> Richard
> --
> Richard Marsden
> Winwaed Software Technology LLC
> http://www.winwaed.com
> Tools and Add-ins for MapPoint - http://www.mapping-tools.com
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