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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Happy Thanksgiving Everyone!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Who’s very familiar with GRASS r.walk? I’m finding some tutorials and man pages with examples but having trouble applying what I’ve found. I’m trying to create mobility models for use with lost person analytics.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does is matter what format the input layers are in? Should they all be UTM since that’s in meters? Or is it smart enough to mix and match WGS84 and UTM layers? And along the same lines, does my DEM need to have cells in meters? Most of what I get comes native in WGS84 with altitudes in feet, so if I don’t need to add extra steps converting to UTM and cells to meters that’s a good thing.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For the friction layer, the example on the man page appears to use landclass96 and only has 7 classifications… the NLCD 2011 land classification file I have has 30-40 classifications ranging from 11 to 95, does anyone have friction costs that can be applied to this data? Or at the very least some idea of the best method to use to come up with those values myself?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Josh Q<o:p></o:p></p></div></body></html>