The file canada.zip contains a NOAA AVHRR composite of Canada in "jpeg" format.  
The file contains 3 channels with 5700 pixels by 4800 lines.

Red		is the smoothed NDVI of Blue and Green channels below.	

Green		is AVHRR Channel 2 surface BRDF interpolated.

Blue		is AVHRR Channel 1 surface BRDF interpolated.

	

(BRDF) Bidirectional Reflectance Distribution Function 

(NDVI) Normalized Difference Vegetation Index

!

! ProductIdentity = 19980721

# A unique identifier that distinguishes this product for all others.

# Also used to name the product directory

! ProductType = COMPOSITE

! GeneratingCountry = CANADA

! GeneratingAgency = Manitoba Remote Sensing Centre

! GeneratingFacility = GEOCOMP II

! Satellite = NOAA_14

! Sensor = AVHRR

! SensorOperationMode = Unknown

! NominalImageDateTime = 19980721 00:00:00 GMT

# For Composite products this will be the Composite Start Date Time GMT 

# otherwise for single daily scenes it will be the Image Date Time.

! CompositePeriod = 10 days.

! NumberInputScenes = Unknown

! CatalogueUpdateFile = Unknown

# Catalogue Update File Identifier

! BrowseImageFileName = Unknown

! ProductAccuracy = Unknown

# This attempts to quantify the overall accuracy (x,y) of the product.

# It is derived from the GEO_ERROR_R.IMG image layer.

! ViewAngle =      -56.0000000      56.0000000 Degrees

# For single daily scenes this takes values -55 to +55 while for composite products

# the operator specifies the limits.

! NDVI_SelectionCriteria = MaxNDVI_RETOA

# Identifies the file format of the data files.

# **************** Image Dimensions and attributes ****************

! NumberOfPixels = 5700

! NumberOfLines = 4800

! NumberOfChannels = 1

# Default number of pixels/lines/channels in output image layers(s)

! DataFileFormat = IMG - Flat Raster

! BitsPerPixel = 16 Bits

# Default pixel size in bits in output image(s)

! PixelFormat = UnsignedBinaryInteger

# Default format for pixel data.

! ByteOrdering = Intel

# Defines the default byte ordering (Intel/Motorola) of binary data greater than 8bits wide.

# Indicates whether byte swapping has to be performed to get the correct digital

values on the target

# platform. Intel=PCs, SGI. Motorola=MAC, VMS, SUN platforms.

# **************** Geometric Corrections ****************

! GeometricCorrections = EOD

# This field is meant to give a level of merit or understanding of the geometric correction process.

# Can take the value NONE or any combination of the following, terminated by a blank line:-

# E - Earth rotation correction

# P - Panoramic distortion, Earth curvature correction

# L - Line length correction

# O - Orbit Model Correction

# V - Sensor view angle correction

# D - Digital Elevation Model

! ResamplingAlgorithm =                 

#Can take any one of the following:-

#NONE  - None

#NEAR  - Nearest Neighbour

#BILIN - Bilinear Interpolation

#CUBIC - 4-point cubic convolutions

#8pt   - 8 point modified sin(x)/(x)

#16pt  - 16 point modified sin(x)/(x)

#K8    - Kaiser damped 8 point sin(x)/(x)

#K16   - kaiser damped 16 point sin(x)/(x)

# **************** Geographic and Map Projection information ****************

! CornersOfImage9 =

66.912698 66d54'45.7"N -177.263306 177d15'47.9"W Lat/Long of top left corner of image

84.104295 84d06'15.5"N -74.245082 74d14'42.3"W Lat/Long of top center of image

62.428531 62d25'42.7"N -9.997006 09d59'49.2"W Lat/Long of top right of image

54.245197 54d14'42.7"N -138.980340 138d58'49.2"W Lat/Long of center left of image

62.774814 62d46'29.3"N -89.936008 89d56'9.6"W Lat/Long of center of image

51.183725 51d11'1.4"N -45.449029 45d26'56.5"W Lat/Long of center right of image

36.218551 36d13'6.8"N -122.904216 122d54'15.2"W Lat/Long of bottom left of image

41.124885 41d07'29.6"N -92.125514 92d07'31.9"W Lat/Long of bottom center of image

34.301567 34d18'5.6"N -62.547110 62d32'49.6"W Lat/Long of bottom right of image

! ScenePixelSize = 1000.000000 Meters Easting

! SceneLineSize =  1000.000000 Meters Northing

# Default pixel and line size in meters.

! SceneOffsetEasting = -2599000 Meters

! SceneOffsetNorthing = 10499000 Meters

# The offset in meters of the top left corner of the image grid area from the map

projection origin.

# This will always be an integral number of pixels

! MapProjectionDatum = NAD 83          

! MapProjectionFalseEasting =        0.0000000 Map Origin, false easting, meters.

! MapProjectionFalseNorthing =        0.0000000 Map Origin, false northing, meters.

! MapProjectionMajorAxis =  6378135.0000000 Semimajor axis of reference ellipsoid, meters.

! MapProjectionMinorAxis =  6356750.5000000 Semiminor axis of reference ellipsoid, meters.

! MapProjectionOrigin = 0.000000 00d00'0.0"S -95.000000 95d00'0.0"W

# Lat/Long of Map Projection Origin or central reference point or true scale.

! MapProjectionType = LCC         

49.000000 49d00'0.0"N Lower standard parallel

77.000000 77d00'0.0"N Upper standard parallel