[Openstreetmap] How to be more efficient inserting tracks?
tom at tom-carden.co.uk
Thu Oct 27 09:35:05 BST 2005
On 10/26/05, Johnny Doe <uucp1 at yahoo.com> wrote:
> --- Tom Carden <tom at tom-carden.co.uk> wrote:
> > Do you mean the yellow dots for GPX tracks?
> > I think the current renderer only displays the most
> > recent 50000, which will
> > vary from bounding box to bounding box.
> Hmm, now i'm really confused. What do you mean with
> 'recent' ?
Either the newest tracks by uploaded date, or the newest tracks by GPS
time-stamp. Off the top of my head I'm not sure which Steve orders by.
I can see all my uploaded tracks, some
> of then just disappear depending on the canvas
> bounding box (while being topologically partly
and i don't see any logic behind it.
The logic *might* be that in one bounding box your tracks are the newest,
but in another there are tracks which are newer than your tracks. Maybe.
One can argue that you can't show all uploaded tracks
> if the user requests the global map,
I can argue that you can't show them all in a small area either.
but when the
> tracks randomly disappear in a 1-10km rectangular box
> it is really annoying.
Sure, it's frustrating, and there are plans to allow more manipulation of
which tracks are shown. But at the moment for performance reasons the tracks
are cached in images. We can go back to waiting 2 minutes per refresh for
the applet to load if you'd like?
Honestly, if it's "really annoying" (is it?) then perhaps you could give
more details? A link to a location which demonstrates the problem, or a
screen grab which highlights the missing points. Something like that.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the talk