User Manual - pancroma

and 1 (Brightness, a measure of soil characteristics)band 2 (Greenness, a measure of vegetation characteristics)band 3 (Wetness, the interrelationship of soil and canopy moisture)PANCROMA TM computes the Tasseled Cap Transformation from Landsat ETM+satellite imagery using the following coefficients:Tasseled cap coefficients for Landsat 7 ETM+ at-satellite reflectanceIndex Band 1 Band 2 Band 3 Band 4 Band 5 Band 7Brightness 0.3561 0.3972 0.3904 0.6966 0.2286 0.1596Greenness -0.3344 -0.3544 -0.4556 0.6966 -0.0242 -0.2630Wetness 0.2626 0.2141 0.0926 0.0656 -0.7629 -0.5388Tasseled Cap band values are not all positive, and can range from around –200to +255 when computed from DNs. As a result the bands cannot be directlyinserted into an 8-bit grayscale image model. PANCROMA automatically scalesthe each band based on the minimum and maximum values in that particularband so that they fall within the range of 0 to 255 so that a grayscale and/or falsecolor composite image can be displayed. PANCROMA also offers the option ofsaving the raw band data as a file of type IEEE FP32 data. The file format is thesame as that described in Section 46 of this manual. A diagram of the file formatis repeated here.ROWS groupsFirst row of dataSecond row of dataI16, I16, FLOAT32, FLOAT32, FLOAT32,… FLOAT32, FLOAT32, FLOAT32, …etc.number ROWS;number COLUMNSTo compute the Tasseled Cap transformation for a Landsat ETM+ scene, select‘File ‘ | ‘Open’ and open six Landsat band files: band1, band2, band3, band4,band5 and band 7. Note that the files must be opened in this order. Next select‘Pre Process’ | ‘Tasseled Cap Transformation’ from the main menu. TheTasseled Cap Data Entry Form will be presented, as shown below.200