On 1/5/2016 5:20 PM, Chuck Norcutt wrote:
Is there a "standard" place where GPS data is supposed to reside in the EXIF? Is the
"standard" honored by all apps?
It appears you misunderstand how EXIF is designed. It's open-ended, just a stack of lines with tag names* with their
values. So yes, there are a lot of standard entries, but anyone, from you to a camera maker, can put in anything you
like, as well, using an unused tag name.
To read an EXIF file, one goes through line by line, using and/or converting to usual usage for display the ones you
understand. From there, some applications just ignore the rest, and some show them all, with no interpretation. This
latter is why there are so many mysterious seeming entries in the Camera Maker section when viewed in something like
ExifToolGUI.
There are folks spending time trying to decipher this stuff. A great deal of the understandable info in the Maker
sections is a result of such efforts.
Now, back to "standard place" My S100, with built-in GPS and Raw files, put the GPS info in EXIF for the JPEGs and as
separate .xmp (sidecar) files. Both GeoSetter and LR, when used to add GPS data from track logs, also add them in .xmp
files. So there may be a "standard" to do that with proprietary Raw formats, for fear of altering the originals in
correctly.
As to what is "honored" by all apps, it's sort of pot luck. FastStone, for example, ignores .xmp EXIF, so location only
shows for JPEGs, but not for Raw files or PSDs, even though the data is there.
But really, ti all works pretty well for the main stuff we are interested in.
Mysterious Entry Moose
* OK, there are section headers, too.
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What if the Hokey Pokey *IS* what it's all about?
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