[Openstreetmap] How to be more efficient inserting tracks?

[Tom Carden]

On 10/26/05, Johnny Doe <uucp1 at yahoo.com> wrote:
>
>
> --- Frank Mohr <f_mohr at yahoo.de> wrote:
> >
> > - i could delete them when they apeared
> >
>
> Steve,


Not Steve ;)

can you explain the track clipping algorithm ?


Do you mean the yellow dots for GPX tracks?

My first thought was that it is a scale dependent
> thing,
> but it is not.


Well it is actually, kind of.

Very often the long tracks which are
> definitely inside the canvas "bounding box" are
> invisible, but a simple move makes them visible again,
> while others disappear.


I think the current renderer only displays the most recent 50000, which will
vary from bounding box to bounding box.

Steve's starting to document this stuff at
http://www.openstreetmap.org/wiki/index.php/WMS

Best,

Tom.
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