[Digikam-users] GPS - other maps than worldmap.jpg?

Arnd Baecker arnd.baecker at web.de
Wed Sep 6 14:16:32 CEST 2006


the new GPS view in digikam svn is very nice.

Is there a way to add user-supplied maps?

This would require to have a .jpg (etc.) image of a map
together with corresponding geographical information.

One approch would be to provide the geographical information
is  to use the "world file format",
see e.g.

To create maps with geographical information
the section "Georeferencing"
in the GRASS documentation seems helpful.

Another option to create those maps is `Karto`
which allows to calibrate a scanned map with some
known geo-points (Lambert, UTM, etc.).

Has anyone already tried something in this direction?

Best, Arnd

P.S.: Of course there are a couple problems to be solved, like
- selection of the presently shown map:
  I.e., from what zoom level on does one switch
  to a more detailed map (if available)?
- switching from one map to another if there is partial overlap
  (or how to blend them together?)
- open source/free georeferenced maps seem to be rare.

But maybe for a start one could just allow the user
to select from a list of maps and just display that one.

P.P.S.: This GPS stuff opens cans of worms: for example
associating a GPS track with a folder or set of images
and display of the track in the corresponding map would be cool.

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