geotiffinfo - Information about GeoTIFF file

Filename

String containing the name of the file

FileModDate

String containing the modification date of the file

FileSize

Integer indicating the size of the file in bytes

Format

String containing the file format, which should always be 'tiff'

FormatVersion

String or number specifying the file format version

Height

Integer indicating the height of the image in pixels

Width

Integer indicating the width of the image in pixels

BitDepth

Integer indicating the number of bits per pixel

ColorType

String indicating the type of image: 'truecolor' for a true-color (RGB) image, 'grayscale' for a grayscale image, or 'indexed' for an indexed image

ModelType

String indicating the type of coordinate system used to georeference the image: 'ModelTypeProjected', 'ModelTypeGeographic', or ''

PCS

String describing the projected coordinate system

Projection

String describing the EPSG identifier for the underlying projection method

MapSys

String indicating the map system, if applicable: 'STATE_PLANE_27', 'STATE_PLANE_83', 'UTM_NORTH', 'UTM_SOUTH', or ''

Zone

Double indicating the UTM or State Plane Zone number, empty ([]) if not applicable or unknown

CTProjection

String containing the GeoTIFF identifier for the underlying projection method

ProjParm

An N-by-1 double containing projection parameter values. The identity of each element is specified by the corresponding element of ProjParmId. Lengths are in meters, angles in decimal degrees.

ProjParmId

An N-by-1 cell array listing the projection parameter identifier for each corresponding numerical element of ProjParm:

• 'ProjNatOriginLatGeoKey'

• 'ProjNatOriginLongGeoKey'

• 'ProjFalseEastingGeoKey'

• 'ProjFalseNorthingGeoKey'

• 'ProjFalseOriginLatGeoKey'

• 'ProjFalseOriginLongGeoKey'

• 'ProjCenterLatGeoKey'

• 'ProjCenterLongGeoKey'

• 'ProjAzimuthAngleGeoKey'

• 'ProjRectifiedGridAngleGeoKey'

• 'ProjScaleAtNatOriginGeoKey'

• 'ProjStdParallel1GeoKey'

• 'ProjStdParallel2GeoKey'

GCS

String indicating the geographic coordinate system

Datum

String indicating the projection datum type, such as 'North American Datum 1927' or 'North American Datum 1983'

Ellipsoid

String indicating the ellipsoid name as defined by the ellipsoid.csv EPSG file

SemiMajor

Double indicating the length of the semimajor axis of the ellipsoid, in meters

SemiMinor

Double indicating the length of the semiminor axis of the ellipsoid, in meters

PM

String indicating the prime meridian location, for example, 'Greenwich' or 'Paris'

PmLongToGreenwich

Double indicating the decimal degrees of longitude between this prime meridian and Greenwich. Prime meridians to the west of Greenwich are negative.

UOMLength

String indicating the units of length used in the projected coordinate system

UOMLengthInMeters

Double defining the UOMLength unit in meters

UOMAngle

String indicating the angular units used for geographic coordinates

UOMAngleInDegrees

Double defining the UOMAngle unit in degrees

TiePoints

Structure containing the image tiepoints. The structure contains these fields:

• ImagePoints — A structure containing row and column coordinates of each image tiepoint. The ImagePoints structure contains these fields:

  • Row — A double array of size 1-by-N.

  • Col — A double array of size 1-by-N.

• WorldPoints — A structure containing the x and y world coordinates of the tiepoints. The WorldPoints structure contains these fields:

  • X — A double array of size 1-by-N

  • Y — A double array of size 1-by-N

PixelScale

3-by-1 double array that specifies the X, Y, Z pixel scale values

RefMatrix

3-by-2 double referencing matrix that must be unambiguously defined by the GeoTIFF file; otherwise it is returned empty ([]).

BoundingBox

2-by-2 double array that specifies the minimum (row 1) and maximum (row 2) values for each dimension of the image data in the GeoTIFF file

CornerCoords

A structure with six fields that contains coordinates of the outer corners of the GeoTIFF image. Each field is a 1-by-4 double array, or empty ([]) if unknown. The arrays contain the coordinates of the outer corners of the corner pixels, starting from the (1,1) corner and proceeding clockwise:

• X — Horizontal coordinates in the projected coordinate system. X equals Lon (below) if ModelType is 'ModelTypeGeographic'.

• Y — Vertical coordinates in the projected coordinate system. Y equals Lat (below) if ModelType is 'ModelTypeGeographic'.

• Row — Row coordinates of the corner

• Col — Column coordinates of the corner

• Lat — Latitudes of the corner

• Lon — Longitudes of the corner

GeoTIFFCodes

Structure containing raw numeric values for those GeoTIFF fields that are encoded numerically in the file. These raw values, converted to a string elsewhere in the INFO structure, are provided here for reference. The GeoTIFFCodes fields are:

• Model

• PCS

• GCS

• UOMLength

• UOMAngle

• Datum

• PM

• Ellipsoid

• ProjCode

• Projection

• CTProjection

• ProjParmId

• MapSys

  Each is scalar, except for ProjParmId, which is a column vector.

ImageDescription

String describing the image; if no description is included in the file, the field is omitted.