Comments on: Exiftool is easy to use

By: adino

adino — Mon, 28 Apr 2008 12:25:34 +0000

One must specify format in DD.MMMMM instead of DD,MMMMM as you write in the post. I just tested it, and if I used comma as decimal point separator it returned strange results.

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By: Phil Harvey

Phil Harvey — Thu, 14 Sep 2006 19:18:42 +0000

Ooops. Forgot the “-” before “gpsaltituderef” in the examples above, but you get the idea…

By: Phil Harvey

Phil Harvey — Thu, 14 Sep 2006 19:13:21 +0000

The GPSAltitudeRef problem is one of the ExifTool FAQ’s. You need to use the -n option to set it numerically, or use the proper string:

exiftool -n gpsaltituderef=0 image.jpg

exiftool “gpsaltituderef=above sea level” image.jpg

By: Andrew

Andrew — Sun, 24 Apr 2005 21:24:49 +0000

This isn’t the case in my experience. I have successfully written the Latitude/Longitude as dd,mm,ss.ss. However, the GPSAltitudeRef doesn’t work for writing. It appears there wasn’t a suitable conversion function written in the perl code.

By: Russell Nelson

Russell Nelson — Sat, 23 Apr 2005 23:33:05 +0000

Hmmm…. For whatever reason, it looks like the lat/lon needs to be specified as ss,mm,dd, not dd,mm,ss as you wrote.
-russ

By: Phil Harvey

Phil Harvey — Fri, 04 Mar 2005 14:08:52 +0000

The GPS lat/long information is stored in binary format as in the EXIF information. Whether you use commas or anything else to separate the degree/minutes/seconds makes no difference, since they are all removed before the binary values are written to file. ExifTool is very flexible about the input formats, so your first example will have produced identical EXIF information as if you had used commas.

True though, you should specify a lat/long ref (N or S/E or W) when specifying lat/long.