[OSM-talk] GPX tracing from New Popular Edition Maps

Etienne 80n80n at gmail.com
Fri Oct 27 12:26:25 BST 2006


Nick
This is really nice.  Have already been able to resolve some boundaries in
inaccessible locations.  Should be really useful.

Etienne

On 10/27/06, Nick Burch <openstreetmap at gagravarr.org> wrote:
>
> Hi All
>
> Having finally cracked those last pesky few IE issues, my GPX tracer is
> now ready for wider use:
>
>                 http://gpx.npemap.org.uk/
>
> The navigation is much like the main npemap site, until you're fully
> zoomed in. At this point, you click away to mark points, click on them
> to remove mistakes, and then generate a GPX file of your clicks.
>
> As the scans aren't perfectly tiled, you'll need to calibrate before you
> generate the GPX. Click on the calibrate link, then click where the grid
> lines cross. Repeat until you've done all 4 joins, or as many as you can
> see (they can be hard to spot in dense urban areas)
>
> Few things to be aware of:
> * When you scroll around the map (nsew links), you'll loose your gpx
>     points. Generate the GPX before moving off
> * Calibration doesn't really work across sheet boundaries. Calibrate and
>     trace up to one, then scroll over and calibrate+trace on the new sheet
> * Some features have moved since the 50s. Please use local knowledge to
>     that something's still there before tracing
>
> Nick
>
>
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