[ gpsdrive ] How do I display scanned map?

[Hamish]

George Farris wrote:
> > I have scanned a map and tried to import it into gpsdrive but it
> > won't display.
> > 
> > I have scanned the map and scaled it to 1280x1024 in png format.
> > I have and entry for it in map_koord.txt like so:
> > 
> > top_111.png 48.69515 124.56899 100000

Charles Curley wrote:
> Judging by your email address, you are in British Columbia. In that
> case, you may need a minus sign in from of the longitude. E.g.:
> 
> top_111.png 48.69515 -124.56899 100000


also, did you use the "100000" scale factor as it is a 1:100,000 map?
I'm not so sure that is right.

What are the 4 corners of the map in lat/lon?
Is it a lat/lon map or Mercator projection, both? ...?


Joerg:
> I'm not sure; but can you try saving it as gif?

No, .png (or .tif, ...) should work ok.
AFAIK these days .gif-only is only required for Tcl/Tk GUIs.



Hamish