[OSM-dev] Faster Commercial Layers

[Christopher Schmidt]

On Wed, Nov 21, 2007 at 09:09:39AM +0000, Andy Robinson wrote:

Sorry! This was meant to go to the OpenLayers list. SEnding emails at
4am is worse than committing at 3:30!

> 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
> >
> >
> > _______________________________________________
> > dev mailing list
> > dev at openstreetmap.org
> > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev
> >
> >
> 
> 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

-- 
Christopher Schmidt
MetaCarta