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

[Andy Robinson]

Nice one Nick. 

The only comment I'd make is that if you are doing a lot of tracing you can
easily get lost as to what was the last point you clicked (if you step away
for a moment especially). Most of the gpx/track tracers I have used link the
points with a line so that you can see your route. I think that would reduce
errors. If lines are a problem then colouring the last point entered
differently might work as a partway fix.

Cheers

Andy

Andy Robinson
Andy_J_Robinson at blueyonder.co.uk 

>-----Original Message-----
>From: talk-bounces at openstreetmap.org [mailto:talk-
>bounces at openstreetmap.org] On Behalf Of Nick Burch
>Sent: 27 October 2006 10:42 AM
>To: talk at openstreetmap.org
>Subject: [OSM-talk] GPX tracing from New Popular Edition Maps
>
>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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