Hello, on this zip file you have : SPOTAlpilles010315_3x3TOA.bil & SPOTAlpilles010315_3x3TOC.bil Subset of the SPOT2/HRV1 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 : 15/3/2001 Acquisition Hour : 10:39:45 K-J Identification : 049-261 Samples : 152 Lines : 152 Bands : 3 View zenith angle (°) : 8.40 View azimuth angle (°) : 101.20 Solar zenith angle (°) : 49.04 Solar azimuth angle (°) : 156.32 REFLECTANCE = DIGITAL COUNT / 1000 PROJECTION CHARACTERISTICS This image was geo-referenced by SPOTImage (SPOTViewBasic product) Map Projection Name : France Zone III sud Datum : Nouvelle Triangulation Francaise IGN Units : Meters} Pixel Size (Easting): 20.00000000 Pixel Size (Northing): 20.00000000 Upper Left Corner Easting: 792039.1700 Upper Left Corner Northing: 171809.8200 SemiMajorAxis: 6378249.2 SemiMinorAxis: 6356515.0 Latitude of projection origin (°): 44.100000 Longitude of central meridian (°): 2.337229 False Easting: 600000.0 False Northing: 200000.0 Longitude of 1st Standard Parallel (°): 43.199291 Longitude of 2nd Standard Parallel (°): 44.996094 TOA reflectance (Top of Atmosphere) TOC reflectance (Top of Canopy)