[gstreamer-bugs] [Bug 481169] [tag] add support for geo tags (gps location etc.)

[GStreamer (bugzilla.gnome.org)]

If you have any questions why you received this email, please see the text at
the end of this email. Replies to this email are NOT read, please see the text
at the end of this email. You can add comments to this bug at:
  http://bugzilla.gnome.org/show_bug.cgi?id=481169

  GStreamer | gst-plugins-base | Ver: 0.10.16




------- Comment #5 from Edgard Lima  2007-11-07 15:51 UTC -------
Yes, I agree with Stefan. In addition to EXIF and XMP that has some tags
related to GPS, there might be some other formats or individual applications
interested in GPS tags.

Follow bellow my suggestion for those tags:

GST_TAG_GPS_LATITUDE G_TYPE_STRING "DDD,MM,SSk" fixed size string where:
  D- degrees, M- minutes, S-seconds, k- N (north) or S (south)

GST_TAG_GPS_LONGITUDE "DDD,MM,SSk" fixed size string where:
  D- degrees, M- minutes, S-seconds, k- E (east) or W (west)

GST_TAG_GPS_ALTITUDE G_TYPE_FLOAT (negative mean bellow sea level)

GST_TAG_GPS_SATELLITES G_TYPE_STRING (This tag can be used to describe
  the number of satellites, their ID number, angle of elevation,
  azimuth, SNR and other information in ASCII notation)

GST_TAG_GPS_MEASUREMODE G_TYPE_INT (2 or 3 dimensional)

GST_TAG_GPS_DOP G_TYPE_FLOAT (data degree of precision, HDOP for 2-dimensional,
  PDOP for 3-dimensional)

GST_TAG_GPS_SPEED G_TYPE_FLOAT (always in km/h)

GST_TAG_GPS_TRACK G_TYPE_STRING "xxx.xxkyyy.yy" fixed size string where:
  xxx.xx from 000.00 to 359.99
  yyy.yy from 000.00 to 180.00 (vertical from down to up)
  -01.00 for unknown direction
  k - 'T' true direction
  k - 'M' magnetic direction
  This value means the direction of movement.

GST_TAG_GPS_IMAGE_DIRECTION same type as GST_TAG_GPS_TRACK
  this value means the direction of image (captured, or on user hands)

GST_TAG_GPS_PROCESSINGMETHOD GST_TYPE_STRING (method used for location finding)

GST_TAG_GPS_AREAINFORMATION GST_TYPE_STRING (name of the GPS area)

GST_TAG_GPS_DIFFERENTIAL G_TYPE_BOOLEAN (if using measurement with differential
  correction)

I think those fields are good for the time being (I have proposed them by
looking at Exif and XMP, except for vertical direction with was by myself).

BR,
Edgard


-- 
See http://bugzilla.gnome.org/page.cgi?id=email.html for more info about why you received
this email, why you can't respond via email, how to stop receiving
emails (or reduce the number you receive), and how to contact someone
if you are having problems with the system.

You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=481169.