[OpenLayers-Dev] [crschmidt@metacarta.com: [OSM-dev] Faster Commercial Layers]

[Paul Spencer]

Chris,

this works really well for me in firefox on macosx.  Excellent find.

Paul

On 21-Nov-07, at 8:20 AM, Christopher Schmidt wrote:

> Sigh. Sending emails at 3:45 is worse than committing at 3:30. This  
> went
> to the osm-dev instead of ol-dev list.
>
> -- Chris
>
> ----- Forwarded message from Christopher Schmidt <crschmidt at metacarta.com 
> > -----
>
> From: Christopher Schmidt <crschmidt at metacarta.com>
> To: dev at openstreetmap.org
> Date: Wed, 21 Nov 2007 03:49:34 -0500
> Subject: [OSM-dev] Faster Commercial Layers
>
> 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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>
> ----- End forwarded message -----
>
> -- 
> Christopher Schmidt
> MetaCarta
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|Paul Spencer                          pspencer at dmsolutions.ca    |
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|Chief Technology Officer                                         |
|DM Solutions Group Inc                http://www.dmsolutions.ca/ |
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