User Manual - pancroma

not find this file , you will be prompted to enter the row and column count datamanually.) These values will always be labeled ‘lines’ and ‘samples’ and will looksomething like this in the metadata files:PRODUCT_SAMPLES_PAN = 15781PRODUCT_LINES_PAN = 13961PRODUCT_SAMPLES_REF = 7891PRODUCT_LINES_REF = 6981IMPORTANT NOTE: Some browsers may add control characters when savingthe .mht file. These characters may prevent PANCROMA TM from successfullyreading the metadata. It is usually safest to save the .mht file as a text file (.txt)and then rename it as an .mht file.The exact number of SAMPLES and LINES will vary somewhat from oneLandsat file to the next. The first two entries describe the PAN file and the lattertwo are for the band files. You will not care about this at all for GeoTiff format asthe metadata is embedded in the GeoTiff band and PAN files.Select ‘Display Files’ and then ‘Display Single Grayscale Image’. The singlegrayscale image will be loaded and rendered in a separate window and will looksomething like the image below. These images are quite interesting and usefulby themselves. Open the various band files successively and note thedifferences. Various features of the earth’s surface record in the different sensorbands differently, for example water, vegetation, urban areas, and even surfacemineral deposits. This is what makes Landsat data so useful for so manypurposes. If you wish to save the grayscale image, select ‘File’ | ‘Save’ and theneither .jpg .bmp, .tif or .png format. You can also display the grayscalepanchromatic image in exactly the same fashion.IMPORTANT NOTE: A common error after displaying a single grayscale imageor any other image is to think that the process failed because only a black field isvisible in the graphics viewing window. This is because Landsat images aresomewhat rotated on a black background, and the viewing window defaults to theupper left corner. Make sure you scroll down and across using the slider barsbefore you conclude that the operation failed.Once you are done with an operation such as displaying and/or saving an image,you can start again by selecting “Close Graphic Image and Reset” from the “File”menu.IMPORTANT NOTE: The “Close Graphic Image and Reset” menu selectionmust usually be selected when finishing one operation and starting another. Thismenu selection resets the program variables to their starting conditions, makessure unused memory is freed and carries out other important functions.31