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From: Gary McGath <developer@mcgath.com>
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Date: Fri, 18 Mar 2016 15:52:01 -0400
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Subject: Re: [Tiff] Wrong data type of GPS_IFD and EXIF_IFD tags and,
 other issues
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On 3/18/16 1:00 PM, tiff-request@lists.maptools.org wrote:
> * Is there a spec somewhere that mentions the TIFF_IFD tag and its use
> for EXIF metadata? I'd be more comfortable in knowing that this is
> somewhat official.

The JEITA EXIF 2.3 specification, section 4.6.3, says that the Exif IFD 
tag (34665) and the GPS IFD tag (34853) both take a type of LONG. 
Version 2.2 says the same.

-- 
Gary McGath			http://www.garymcgath.com
File Format Identification Tools course:
https://www.udemy.com/file-format-identification-tools/
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