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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Forgot to mention: pay attention to border effects in r.slope.aspect (see: https://grass.osgeo.org/grass70/manuals/r.slope.aspect.html).
 So if your tiles do not overlap, you might have to merge them...<o:p></o:p></span></p>
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