[GRASS-dev] [GRASS GIS] #1781: v.to.db: slope: slope steepness of vector line or boundary - what

[GRASS GIS]

#1781: v.to.db: slope: slope steepness of vector line or boundary - what
----------------------------+-----------------------------------------------
 Reporter:  hellik          |       Owner:  grass-dev@…              
     Type:  defect          |      Status:  new                      
 Priority:  major           |   Milestone:  6.4.3                    
Component:  Vector          |     Version:  svn-releasebranch64      
 Keywords:  v.to.db, slope  |    Platform:  MSWindows 7              
      Cpu:  x86-64          |  
----------------------------+-----------------------------------------------
Changes (by hellik):

  * priority:  normal => major
  * type:  enhancement => defect


Comment:

 Replying to [ticket:1781 hellik]:
 >
 > there positive and negative values.

 see also attached screenshots, it depends if the line direction is up
 -/down-slope.

 example from the screenshot

 {{{
 cat                                     1                               2
 line direction          down slope              up slope
 slope                           -0,512637               0,527028
 startx                          4537928,996710  4536897,402568
 starty                          2643173,941177  2643324,787491
 startz                          1783,171319             1174,266273
 endx                            4536887,670548  4537919,264690
 endy                            2643144,745117  2643344,251531
 endz                            1161,194798             1808,083109
 }}}


 >
 > '''(1)''' what are the units of this slope value?
 > '''(2)''' how to interpret this values?

 any ideas for this questions?

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/1781#comment:1>
GRASS GIS <http://grass.osgeo.org>