
I'm&nbsp;new&nbsp;to&nbsp;GRASS.&nbsp;I&nbsp;want&nbsp;to&nbsp;define&nbsp;manually&nbsp;the&nbsp;cost&nbsp;information(speed)&nbsp;according<br>&nbsp;to&nbsp;the&nbsp;terrain&nbsp;types(hard&nbsp;bed&nbsp;desert,&nbsp;grass&nbsp;land,&nbsp;roads,&nbsp;etc)&nbsp;and&nbsp;process&nbsp;it&nbsp;wit<br>h&nbsp;'r.cost'.&nbsp;What&nbsp;would&nbsp;the&nbsp;process&nbsp;be&nbsp;like?&nbsp;It&nbsp;seems&nbsp;to&nbsp;me&nbsp;that&nbsp;a&nbsp;cost&nbsp;surface&nbsp;wo<br>uld&nbsp;be&nbsp;added&nbsp;to&nbsp;the&nbsp;map,&nbsp;and&nbsp;then&nbsp;run&nbsp;r.cost.&nbsp;But&nbsp;I&nbsp;don't&nbsp;know&nbsp;the&nbsp;details.&nbsp;Thank<br>&nbsp;you.<br><br>Wang&nbsp;Sang<br><body DEFANGED_BACKGROUND="http://images.163.com/images/logo/maillist/vip/background.gif" bgproperties="fixed">

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