Notes on photo tags

A collection of 7587 images; mainly photos from a couple of different cameras. Processed using Apache Tika to extract the metadata.
307 different tags were found as below.

The interesting/useful ones are: 

• the "Chroma Palette PaletteEntry" entries are from some BMP files.
•  Width fields: "tiff:ImageWidth" and "ImageWidth" and  "Exif Image Width" and "width"
• Taken date: "Creation-Date" "meta:creation-date" and "dcterms:created"
• geo:lat and geo:lng
• tiff:Model
• meta:keyword dc:subject

Occurance	Field
34865	Chroma Palette PaletteEntry
7586	tiff:ImageWidth
7586	tiff:ImageLength
7586	Content-Type
7586	Content-Length
7586	resourceName
7248	tiff:BitsPerSample
6824	Data Precision
6824	Y Resolution
6824	Component 1
6824	Compression Type
6824	X Resolution
6824	Image Width
6824	Number of Components
6824	Image Height
6820	Component 2
6820	Component 3
5993	Exif Version
5944	Exif Image Width
5944	Exif Image Height
5920	Creation-Date
5920	meta:creation-date
5920	dcterms:created
5903	Date/Time Digitized
5903	Resolution Unit
5901	meta:save-date
5901	Last-Save-Date
5901	Last-Modified
5901	modified
5901	Date/Time
5901	dcterms:modified
5901	date
5899	Model
5899	tiff:ResolutionUnit
5899	tiff:Model
5899	tiff:XResolution
5899	FlashPix Version
5899	Color Space
5899	tiff:Make
5899	tiff:YResolution
5899	Make
5864	YCbCr Positioning
5864	Components Configuration
5843	Date/Time Original
5827	Focal Plane X Resolution
5827	Focal Plane Resolution Unit
5827	Focal Plane Y Resolution
5804	Thumbnail Compression
5801	Thumbnail Length
5801	Thumbnail Offset
5755	exif:DateTimeOriginal
5746	File Source
5735	Metering Mode
5735	Flash
5735	Exposure Bias Value
5735	Focal Length
5735	exif:FocalLength
5735	exif:FNumber
5735	F-Number
5735	exif:Flash
5712	Aperture Value
5712	Shutter Speed Value
5700	Max Aperture Value
5695	Compressed Bits Per Pixel
5671	Interoperability Version
5661	Interoperability Index
5625	Sensing Method
5426	White Balance
5403	Sharpness
5400	Quality
5400	Focus Mode
5400	Flash Mode
4800	Exposure Time
4800	exif:ExposureTime
4743	Exposure Mode
4739	White Balance Mode
4739	Scene Capture Type
4739	Custom Rendered
4360	Software
4360	tiff:Software
4094	Orientation
4066	tiff:Orientation
3811	Related Image Width
3811	Related Image Length
3581	Resolution Units
3215	Unique Image ID
2948	Scene Type
2937	Copyright
2937	exif:IsoSpeedRatings
2937	Exposure Program
2937	ISO Speed Ratings
2876	Brightness Value
2838	User Comment
2794	Digital Zoom Ratio
2787	Firmware Version
2764	Firmware Revision
2764	Control Mode
2764	Date Stamp Mode
2764	Long Focal Length
2764	Iso
2764	Macro Mode
2764	Thumbnail Image Valid Area
2764	Valid AF Point Count
2764	My Colors
2764	Auto Rotate
2764	Camera Temperature
2764	Measured EV 2
2764	Self Timer Delay
2764	AF Image Height
2764	Auto ISO
2764	AF Point Selected
2764	AF Points in Focus
2764	AF Points in Focus Count
2764	Saturation
2764	Auto Exposure Bracketing
2764	Self Timer 2
2764	Flash Output
2764	Flash Guide Number
2764	Owner Name
2764	AEB Bracket Value
2764	Target Aperture
2764	Contrast
2764	ND Filter
2764	Flash Activity
2764	Target Exposure Time
2764	AF Area Height
2764	Easy Shooting Mode
2764	Image Type
2764	AF Point Count
2764	Exposure Compensation
2764	Focus Distance Lower
2764	Image Number
2764	Focus Distance Upper
2764	Image Size
2764	Canon Model ID
2764	Camera Info Array
2764	Focal Units per mm
2764	AF Area Y Positions
2764	Digital Zoom
2764	Flash Details
2764	Optical Zoom Code
2764	Continuous Drive Mode
2764	Primary AF Point 1
2764	Primary AF Point 2
2764	Base ISO
2764	AF Area X Positions
2764	Camera Type
2764	Bulb Duration
2764	AF Image Width
2764	Short Focal Length
2764	Focus Type
2764	F Number
2764	Sequence Number
2764	Slow Shutter
2764	Flash Exposure Compensation
2764	AF Area Width
2764	Measured EV
2685	Makernote Version
2659	Macro
2636	AE Warning
2636	Flash Strength
2636	Picture Mode
2636	Blur Warning
2636	Continuous Taking Or Auto Bracketting
2636	Slow Synch
2636	Focus Warning
2244	Color Saturation
2121	IPTC-NAA record
1944	Keywords
1944	meta:keyword
1944	dc:subject
1944	subject
1907	Subject Distance Range
938	Application Record Version
937	Caption digest
934	Enveloped Record Version
934	Coded Character Set
762	Compression CompressionTypeName
762	height
762	width
654	GPS Version ID
651	GPS Altitude Ref
651	GPS Longitude
651	GPS Latitude Ref
651	geo:lat
651	GPS Latitude
651	GPS Longitude Ref
651	geo:long
608	Author
608	creator
608	dc:creator
608	meta:author
597	By-line
425	GPS Altitude
424	Data BitsPerSample
398	Dimension HorizontalPhysicalPixelSpacing
398	Dimension VerticalPhysicalPixelSpacing
398	Dimension PixelAspectRatio
380	Artist
338	Data SampleFormat
338	Chroma NumChannels
338	ImageDescriptor
338	Dimension VerticalPixelOffset
338	GraphicControlExtension
338	Compression Lossless
338	Dimension ImageOrientation
338	Chroma BlackIsZero
338	Dimension HorizontalPixelOffset
338	Chroma ColorSpaceType
338	Compression NumProgressiveScans
336	LocalColorTable ColorTableEntry
205	dc:description
205	description
167	Caption/Abstract
161	Spatial Frequency Response
148	Chroma Palette
134	Flags 1
134	DCT Encode Version
134	Color Transform
134	Flags 0
72	Resolution Info
72	Print flags
72	Print flags information
70	Color transfer functions
70	Color halftoning information
62	Transparency TransparentIndex
61	Red Colorant
61	XYZ values
61	Profile Size
61	Class
61	Media White Point
61	Red TRC
61	Green TRC
61	Blue TRC
61	Profile Connection Space
61	Media Black Point
61	Color space
61	Green Colorant
61	CMM Type
61	Profile Description
61	Blue Colorant
61	Primary Platform
61	Signature
61	Device manufacturer
61	Tag Count
61	Profile Date/Time
61	Comments
61	w:comments
61	comment
60	Viewing Conditions Description
60	Device model
60	Viewing Conditions
60	Technology
60	Device Mfg Description
60	Measurement
60	Device Model Description
60	Luminance
53	Jpeg Comment
47	Component 4
46	Noise
42	JPEG quality
42	Copyright flag
42	Sub-Sec Time Original
42	Sub-Sec Time Digitized
42	Grid and guides information
38	Sub-Sec Time
38	Image Description
26	Mac Print info
23	Jpeg Quality
23	Special Mode
23	Camera Id
23	Data Dump
23	Pict Info
23	DigiZoom Ratio
21	ApplicationExtensions ApplicationExtension
18	dc:title
18	Windows XP Title
15	Windows XP Keywords
10	Seed number
10	Global Angle
9	Thumbnail Data
8	CommentExtensions CommentExtension
8	Text TextEntry
6	Windows XP Author
4	Date Created
4	Time Created
3	Print Scale
3	Pixel Aspect Ratio
3	Subject Distance
3	tiff:SamplesPerPixel
3	LocalColorTable
3	Object Name
3	Lens
3	URL List
3	XML Data
3	Serial Number
3	Firmware
3	Global Altitude
3	Version Info
3	Lens Information
3	Slices
2	Photoshop 4.0 Thumbnail
2	Grayscale and multichannel halftoning information
2	Grayscale and multichannel transfer function
1	Originating Program
1	Layer state information
1	Layers group information