Hello, on this zip file you have : SPOTAlpilles020720_3x3TOA.bil & SPOTAlpilles020720_3x3TOC.bil Subset of the SPOT4/HRVIR1 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),(line1,band4),(line2,band2),... Pixels are registered by their upper left corner Envi header file (.hdr) is available GENERAL CHARACTERISTICS Acquisition Date : 20/7/2002 Acquisition Hour : 10:49:28 K-J Identification : 048-262 Samples : 152 Lines : 152 Bands : 4 Band4 : SWIR = 1580-1750 nm View zenith angle (°) : 8.60 View azimuth angle (°) : 283.10 Solar zenith angle (°) : 25.81 Solar azimuth angle (°) : 147.46 REFLECTANCE = DIGITAL COUNT / 1000 PROJECTION CHARACTERISTICS This image is geo-referenced (TOA) and atmospherically corrected (TOC), and is kindly provided by the CHRYSALIDE project 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 : 636394.126 Upper Left Corner Northing : 4853761.626 TOA reflectance (Top of Atmosphere) TOC reflectance (Top of Canopy)