GPS data deliberately degraded?

Question

Level 1

25 points

GPS data deliberately degraded?

I'm stunned. I have a GISTEQ PhotoTrackr and just took some test shots on the drive up to Berkeley. It appears that Aperture deliberately ignores the seconds on GPS timestamps, and lumps all the pictures from a given minute into the same location. At 60mph, that means the location data can literally be off by a mile.

Why on earth would Aperture deliberately degrade such accurate data? This is really appalling.

Yes, I know, I'll post feedback, but this *****.

17" Unibody MBP, Mac OS X (10.6.2)

Posted on Feb 14, 2010 11:42 PM

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Answer 1

pitdo01

Level 1

5 points

Mar 15, 2010 1:22 PM in response to Zandr

how did you get the Gisteq log information into Aperture? I have been using the Gisteq application to get the photo's and GPS information linked then I import it into Aperture. It is a pain.

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Answer 2

Zandr Author

Level 1

25 points

Mar 20, 2010 10:44 AM in response to pitdo01

I use myTracks to extract a GPX file, and then use either exiftool or Aperture to tag the data. As I'm often using exiftool to add manual-focus lens metadata, this isn't much of a pain.

It turns out that Aperture isn't rounding the data as I had thought, but I was getting poor results because of how I was aligning the track to the photos. There's no easy way in Aperture to actually use the timestamps without adjustment. Ironically, this means you get better results when you align using a point when you were moving quickly.

I was trying to align the track at my starting point, you get better results picking something in the middle.

Exiftool, as you'd expect from a commandline tool, allows precise control.

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Answer 3

Zandr Author

Level 1

25 points

Mar 20, 2010 10:45 AM in response to Zandr

Marking answered thanks to better understanding of the Place tool.

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