[OSM-dev] Faster Commercial Layers

[Andy Robinson]

On 21/11/2007, Christopher Schmidt <crschmidt at metacarta.com> wrote:
> The three commonly used commercial layers -- Google, VirtualEarth, and
> Yahoo -- now each have a mechanism using the internals of their
> respective APIs to grab faster ways to move map tiles around.
>
> http://openlayers.org/dev/examples/spherical-mercator.html now
> demonstrates this.
>
> Erik reports that IE is throwing an error. Since is it 3:45 in the
> morning, I'm going to go to sleep now, get an early start and try to
> hack on the IE issue first thing before work, and get it resolved.
>
> In the meantime, Firefox browsers might be interested in checking the
> uRL above and checking out the other APIs.
>
> (Note that Yahoo/VE both have weird ideas about what to do when viewing
> the whole world -- best to zoom in a couple notches.)
>
> Additionally, there is an option on the EventPane layer class:
>
> {Boolean} smoothDragPan determines whether non-public/internal API
> methods are used for better performance while dragging EventPane layers.
> When not in sphericalMercator mode, the smoother dragging doesn't
> actually move north/south directly with the number of pixels moved,
> resulting in a slight offset when you drag your mouse north south with
> this option on.  If this visual disparity bothers you, you should turn
> this option off, or use spherical mercator.  Default is on.
>
> Feedback welcome; I'm hoping that at least some if it will be positive
> :)
>
> Regards,
> --
> Christopher Schmidt
> MetaCarta
>
>
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>
>

Slick.

The thing I notice most when something like this gets promoted is the
obvious lack of an OSM logo to go with the OSM tiles. How do the other
API's provide this and can we do it too?

Cheers

Andy
-- 
Andy Robinson