[Digikam-devel] [digikam] [Bug 303062] Add image direction in Map module (from EXIF of geotagging pictures with compass heading))

[Eric Bayard]

https://bugs.kde.org/show_bug.cgi?id=303062

Eric Bayard <ebayard63-projet at yahoo.fr> changed:

           What    |Removed                     |Added
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                 CC|                            |ebayard63-projet at yahoo.fr

--- Comment #4 from Eric Bayard <ebayard63-projet at yahoo.fr> ---
There are a lot of camera support this feature by now and it is very useful to
some users like geologist,...

Note that it helps a lot when trying to manually add gps coordinats to the
photo.
Indeed if you can see the angle of view on the map , you can see what was
photographed, I frequently uses this to perfectly set my pictures on geosetter.

You can check this feature request thread on geosetter that was used to
implements the feature in it:
http://www.geosetter.de/mantis/view.php?id=82

A few great feature of geosetter:
-the direction is drawn as a transparent triangle that represent the camera
field of view.
  the field of view is computed from the focal length and sensor size
(geosetter has a list of camera sensor size relative to 24*36 format but you
can also get it from exif on some camera model)
-you can set the direction as being magnetic or true north

what could be added: 

-the size of the triangle can be computed from the horizon distance (
http://de.wikipedia.org/wiki/Potenz_(Geometrie) )

-Magnetic north could be corrected to geographic north
to correct the declination you can have a look there, they give the source code
in C and the data.
http://www.ngdc.noaa.gov/geomag/WMM/soft.shtml [^]
an example of web site using it with google map:
http://www.magnetic-declination.com/what-is-magnetic-declination.php

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