Hello, on this zip file you have : SPOTPuechabon010612_3x3.bil Subset of the SPOT2/HRV2 Generic Binary array file, band interleaved by line (BIL) format Data format is an unsigned integer (2 bytes) Data are stored in the order (line1,band1),(line1,band2),(line1,band3),(line2,band2),... Pixels are registered by their upper left corner Envi header file (.hdr) is available GENERAL CHARACTERISTICS Acquisition Date : 12/6/2001 Acquisition Hour : 10:28:13 K-J Identification : 047-262 Samples : 152 Lines : 152 Bands : 3 View zenith angle (°) : 29.30 View azimuth angle (°) : 98.80 Solar zenith angle (°) : 25.94 Solar azimuth angle (°) : 136.41 REFLECTANCE = DIGITAL COUNT / 1000 PROJECTION CHARACTERISTICS This image was geo-referenced by SPOTImage (SPOTViewBasic product). As geo-referencing was not satisfying, a second geometric correction was performed at INRA, by Frédéric Morihain. Map Projection Name : UTM 31, North Datum : WGS-84 Units : units=Meters Pixel Size (Easting) : 20.00000000 Pixel Size (Northing) : 20.00000000 Upper Left Corner Easting : 550995.800 Upper Left Corner Northing : 4843008.700 TOA reflectance (Top of Atmosphere)