Hi Frank<br> <br> Thank you for your help , I tried to use the color ramp but i get exactly the same result, MapServer did not give any error but the result was the same. <br> <br> LAYER<br> NAME 'result' <br> DATA 'blue.tif'<br> TYPE RASTER<br> STATUS ON<br> PROCESSING 'SCALE=0,455'<br> CLASS <br> STYLE<br> COLORRANGE 0 0 0 255 0 0<br> DATARANGE 0 100<br> END<br> <br> STYLE<br> COLORRANGE 0 0 0 0 255 0<br> DATARANGE 101 300<br> END<br> STYLE<br> COLORRANGE 0 0 0 0 0 255<br> DATARANGE 301 455<br> END <br> END<br> END<br> <br>Thanks in
advance<br><b><i><br> Frank Warmerdam <warmerdam@pobox.com></i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> salah jubeh wrote:<br>> Hi guys,<br>> I have a problem such that i have 1 band images and these images is <br>> unsigned 16, when MapServer create PNG images for viewing , these images <br>> are very dark. How can i enhance there appearance or how can i <br>> apply RGB templates on them.<br><br>Salah,<br><br>You can control how 16bit imagery is scaled to 8bit with the SCALE<br>PROCESSING options. The raster data access howto should touch on these.<br>But for instance if your data has values from 0 to 4000 but the vast<br>majority of the pixels are in the range 0 to 500 then you might use something<br>like:<br><br> PROCESSING "SCALE=0,550"<br><br>This would stretch input value 0 to black, 550 to white and any values over<br>550 to white.<br><br>However, if you
have no scaling options it is likely that that a dark image<br>indicates a dynamic range mostly well below 255 to start with. In this case<br>just adding<br> PROCESSING "SCALE=AUTO"<br>may help a lot.<br><br>If you want to use a color ramp (rather than just greyscale output) then you<br>might look into the color range options. For instance:<br><br>LAYER<br> NAME grid1<br> TYPE raster<br> STATUS default<br> DATA data/float.tif<br> PROCESSING "SCALE=-10,28"<br> CLASS<br> STYLE<br> COLORRANGE 0 0 0 255 0 0<br> DATARANGE -10 28<br> END<br> END<br>END<br><br>Best regards,<br>-- <br>---------------------------------------+--------------------------------------<br>I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com<br>light and sound - activate the windows | http://pobox.com/~warmerdam<br>and watch the world go round - Rush | President OSGF, http://osgeo.org<br><br></blockquote><br><p>
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