Create personal Maps for tangogps or similar

[omcomali.rhn at porcupinefactory.org]

On Thu, 5 Aug 2010 17:53:45 +0200
Kevin Zuber <openmoko at knet.eu> wrote:

> >
> > Well, you can't :)
> >
> > I read your other post. To make it all work, you need to:
> > a) rectify your image - there are services like http://labs.metacarta.com/rectifier/ , but be careful, they publish your maps by default. They are open source, but difficult to set up. This will calibrate the scanned map with OSM overlay.
> > b) find the coordinates of the edges - should not be very hard
> > c) modify my set of scripts to accept the rectified image and edges' coordinates - I'll have to take a look at it if you need help here
> > d) run the script
> 
> Ok I make progress. What I meant with "gps calibration" is Image
> Rectification[1] as you described but I didn't know about this before
> :).
> 
> Shouldn't be the geo and coordinate information inside the GeoTiff
> Image after rectification? So step b) may be skipped?
> 
> Your script require an osm file or zoom-12, so I just need a way to
> convert a geotiff file to osm, right?
> 
> [1] http://en.wikipedia.org/wiki/Image_rectification#Geographic_information_system
> [2] http://en.wikipedia.org/wiki/GeoTIFF
> 

My script doesn't read GeoTIFF, so you still need step b). It takes raw OSM data and converts it to image, so it does one step too much. You can't convert it the other way round, so the script can't be used without modification. The rendering and svg->png conversion must be removed.