Dear all,<br><br>I extracted the drainage and direction from a DEM using r.stream.extract.<br>r.stream.extract --o elevation=aster_dem_wgs84_UTM threshold=50<br>   stream_vect=aster_dem_wgs84_UTM_vect_th00050 <br>   stream_rast=aster_dem_wgs84_UTM_rast_th00050 <br>
   direction=aster_dem_wgs84_UTM_rast_th00050_direction<br><br>How can I obtain a vector of Horton order?!<br><br>cheers<br><br>milton<br><br><br>