http://njgeo.org/2010/05/29/apple-iphoto-rounds-gps-coordinates-to-nearest-second/ GIS and planning in New Jersey Sat, 11 Feb 2012 16:55:02 +0000 hourly 1 http://wordpress.org/?v=3.3.2 http://njgeo.org/2010/05/29/apple-iphoto-rounds-gps-coordinates-to-nearest-second/comment-page-1/#comment-423 new jersey geographer » Blog Archive » More on Apple’s mishandling of geotagged photos Tue, 06 Jul 2010 00:16:32 +0000 http://njgeo.org/?p=273#comment-423 [...] In my previous post, I claimed that iPhoto was the culprit behind the mangling of the GPS coordinates embedded in my photographs. The problem likely lies in the Core Image library used throughout Mac OS X. To see if other image editing applications exhibited the same geotagging flaw, I used a jpg right off of my camera and rotated and saved it in Preview, Apple’s default image viewer. This demonstration shows that the method used to write .jpg files alters the GPS coordinates stored in the EXIF metadata. In Preview - Click to enlarge. [...] [...] In my previous post, I claimed that iPhoto was the culprit behind the mangling of the GPS coordinates embedded in my photographs. The problem likely lies in the Core Image library used throughout Mac OS X. To see if other image editing applications exhibited the same geotagging flaw, I used a jpg right off of my camera and rotated and saved it in Preview, Apple’s default image viewer. This demonstration shows that the method used to write .jpg files alters the GPS coordinates stored in the EXIF metadata. In Preview – Click to enlarge. [...]

]]> http://njgeo.org/2010/05/29/apple-iphoto-rounds-gps-coordinates-to-nearest-second/comment-page-1/#comment-421 John Reiser Sun, 04 Jul 2010 22:01:15 +0000 http://njgeo.org/?p=273#comment-421 It's not just iPhoto. It's in Core Image, because the same issue occurs simply by opening a photo with Preview and saving. I'll post more details soon. It’s not just iPhoto. It’s in Core Image, because the same issue occurs simply by opening a photo with Preview and saving. I’ll post more details soon.

]]> http://njgeo.org/2010/05/29/apple-iphoto-rounds-gps-coordinates-to-nearest-second/comment-page-1/#comment-420 Don’t trust iPhoto’s exported GPS coordinates « Numpty's Progress Sun, 04 Jul 2010 21:53:00 +0000 http://njgeo.org/?p=273#comment-420 [...] the new jersey geographer put this better than me, but it appears that iPhoto rounds exported GPS coordinates to the nearest integer second of arc. There’s really no reason for them to do this, and it’s caused me to waste several [...] [...] the new jersey geographer put this better than me, but it appears that iPhoto rounds exported GPS coordinates to the nearest integer second of arc. There’s really no reason for them to do this, and it’s caused me to waste several [...]

]]> http://njgeo.org/2010/05/29/apple-iphoto-rounds-gps-coordinates-to-nearest-second/comment-page-1/#comment-419 scruss Sun, 04 Jul 2010 19:54:12 +0000 http://njgeo.org/?p=273#comment-419 Bravo, John! I just discovered this after photos exported from iPhoto didn't match the GPX track I'd used to reference them in the first place. I shall make sure that I use exiftool to add/copy coordinates *after* I've exported from iPhoto - but can we trust Apple not to have messed with the picture creation date, too? ;-) Bravo, John! I just discovered this after photos exported from iPhoto didn’t match the GPX track I’d used to reference them in the first place. I shall make sure that I use exiftool to add/copy coordinates *after* I’ve exported from iPhoto – but can we trust Apple not to have messed with the picture creation date, too?

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