I've done this to show the live positions of buses in a transit
system. You can see it at http://search.missouristate.edu/map/?layer=shuttle
Shuttles don't run all the time however, so you won't always see them.
The code on that page is compressed with Closure-compiler, but there
is a comment at the top of the script file telling you how to see the
uncompressed source. My markers are updated once every 5 seconds.

Short of the story is, I wrote my own lightweight markers so that I
could update the offset of the marker image on the fly.

Chad Killingsworth

On Nov 11, 5:33 am, "Alan Thomas" <[email protected]> wrote:
> > How many markers?  Around 50.
> > How far do they go?
>
>     They go across a screen width, and then are deleted.  Others are created
> to replace them.  The map, in the background, is actually static.
>
>                                         Thanks, Alan

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