ImageGear .NET processes EXIF as a metadata format, rather than as a separate image file format.

EXIF Level Metadata

EXIF level metadata uses the following structure.

Name	Id	Type	Value Type	Value	Value Length	Ignored on save
<EXIF subIFD tags>	<EXIF subIFD tag ids>
"Interoperability"	ImGearMetadataFormats.INTEROPERABILITYIFD	Tree
"GPS"	ImGearMetadataFormats.INTEROPERABILITYIFD	Tree

Interoperability and GPS IFDs are optional.

See Exif subIFD tags below for the list of Exif subIFD tag names and Ids.

EXIF GPS Level Metadata

EXIF GPS level metadata uses the following structure:

Name	Id	Type	Value Type	Value	Value Length	Ignored on save
<EXIF GPS tags>	<EXIF GPS tag ids>

See GPS subIFD tags below for the list of EXIF GPS tag names and Ids.

EXIF Interoperability Level Metadata

EXIF Interoperability level metadata uses the following structure:

Name	Id	Type	Value Type	Value	Value Length	Ignored on save
<EXIF Interoperability tags>	<EXIF Interoperability tag ids>

See Interoperability subIFD tags below for the list of EXIF Interoperability tag names and Ids.

Description of Tags Used in EXIF

Exif subIFD Tags

Item Name	Item Id	Ignored on save
"ExposureTime"	33434	FALSE
"Fnumber"	33437	FALSE
"ExposureProgram"	34850	FALSE
"SpectralSensitivity"	34852	FALSE
"ISOSpeedRatings"	34855	FALSE
"OECF"	34856	FALSE
"ExifVersion"	36864	FALSE
"DateTimeOriginal"	36867	FALSE
"DateTimeDigitized"	36868	FALSE
"ComponentsConfiguration"	37121	FALSE
"CompressedBitsPerPixel"	37122	FALSE
"ShutterSpeedValue"	37377	FALSE
"ApertureValue"	37378	FALSE
"BrightnessValue"	37379	FALSE
"ExposureBiasValue"	37380	FALSE
"MaxApertureValue"	37381	FALSE
"SubjectDistance"	37382	FALSE
"MeteringMode"	37383	FALSE
"LightSource"	37384	FALSE
"Flash"	37385	FALSE
"FocalLength"	37386	FALSE
"SubjectArea"	37396	FALSE
"MakerNote"	37500	FALSE
"UserComment"	37510	FALSE
"SubSecTime"	37520	FALSE
"SubSecTimeOriginal"	37521	FALSE
"SubSecTimeDigitized"	37522	FALSE
"FlashPixVersion"	40960	FALSE
"ColorSpace"	40961	FALSE
"PixelXDimension"	40962	TRUE
"PixelYDimension"	40963	TRUE
"RelatedSoundFile"	40964	FALSE
"InteroperabilityIFDPointer"	40965	TRUE
"FlashEnergy"	41483	FALSE
"SpatialFrequencyResponse"	41484	FALSE
"FocalPlaneXResolution"	41486	FALSE
"FocalPlaneYResolution"	41487	FALSE
"FocalPlaneResolutionUnit"	41488	FALSE
"SubjectLocation"	41492	FALSE
"ExposureIndex"	41493	FALSE
"SensingMethod"	41495	FALSE
"FileSource"	41728	FALSE
"SceneType"	41729	FALSE
"CFAPattern"	41730	FALSE
"CustomRendered"	41985	FALSE
"ExposureMode"	41986	FALSE
"WhiteBalance"	41987	FALSE
"DigitalZoomRatio"	41988	FALSE
"FocalLengthIn35mmFilm"	41989	FALSE
"SceneCaptureType"	41990	FALSE
"GainControl"	41991	FALSE
"Contrast"	41992	FALSE
"Saturation"	41993	FALSE
"Sharpness"	41994	FALSE
"DeviceSettingDescription"	41995	FALSE
"SubjectDistanceRange"	41996	FALSE
"ImageUniqueID"	42016	FALSE

GPS subIFD Tags

Item Name	Item Id	Ignored on save
"GPSVersionID"	0	FALSE
"GPSLatitudeRef"	1	FALSE
"GPSLatitude"	2	FALSE
"GPSLongitudeRef"	3	FALSE
"GPSLongitude"	4	FALSE
"GPSAltitudeRef"	5	FALSE
"GPSAltitude"	6	FALSE
"GPSTimeStamp"	7	FALSE
"GPSSatellites"	8	FALSE
"GPSStatus"	9	FALSE
"GPSMeasureMode"	10	FALSE
"GPSDOP"	11	FALSE
"GPSSpeedRef"	12	FALSE
"GPSSpeed"	13	FALSE
"GPSTrackRef"	14	FALSE
"GPSTrack"	15	FALSE
"GPSImgDirectionRef"	16	FALSE
"GPSImgDirection"	17	FALSE
"GPSMapDatum"	18	FALSE
"GPSDestLatitudeRef"	19	FALSE
"GPSDestLatitude"	20	FALSE
"GPSDestLongitudeRef"	21	FALSE
"GPSDestLongitude"	22	FALSE
"GPSDestBearingRef"	23	FALSE
"GPSDestBearing"	24	FALSE
"GPSDestDistanceRef"	25	FALSE
"GPSDestDistance"	26	FALSE
"GPSProcessingMethod"	27	FALSE
"GPSAreaInformation"	28	FALSE
"GPSDateStamp"	29	FALSE
"GPSDifferential"	30	FALSE

Interoperability subIFD Tags

Item Name	Item Id	Read Only
"InteroperabilityIndex "	1	FALSE
"InteroperabilityVersion "	2	FALSE
"RelatedImageFileFormat"	4096	FALSE
"RelatedImageWidth "	4097	FALSE
"RelatedImageLength"	4098	FALSE