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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Re-posting because the code section that Nabble wrote as html formatted was dropped out. Did the same thing happen for you with your original mail?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">It seems that you have defined a Python function "add2" that does nothing because it has no code<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <PixelFunctionType>add2</PixelFunctionType><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <PixelFunctionLanguage>Python</PixelFunctionLanguage><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <PixelFunctionCode><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </PixelFunctionCode> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">You have perhaps tried to modify the example from https://gdal.org/drivers/raster/vrt.html<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><PixelFunctionType>add</PixelFunctionType><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <PixelFunctionLanguage>Python</PixelFunctionLanguage><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <PixelFunctionCode><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><![CDATA[<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> import numpy as np<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> def add(in_ar, out_ar, xoff, yoff, xsize, ysize, raster_xsize,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> raster_ysize, buf_radius, gt, **kwargs):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> np.round_(np.clip(np.sum(in_ar, axis = 0, dtype = 'uint16'),0,255),<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> out = out_ar)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> ]]><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </PixelFunctionCode><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Have you saved your add2 function into a separate Python script? In that case follow the hillshading.py example.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
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