[GRASS-dev] [GRASS GIS] #3356: v.to.db: incorrect area calculations in lat-long location

[GRASS GIS]

#3356: v.to.db: incorrect area calculations in lat-long location
--------------------------+-----------------------------------
  Reporter:  mlennert     |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:  7.4.0
 Component:  Vector       |    Version:  svn-trunk
Resolution:               |   Keywords:  v.to.db area lat-long
       CPU:  Unspecified  |   Platform:  Unspecified
--------------------------+-----------------------------------

Comment (by hellik):

 {{{
  g.region -p vector=training_single at test
  projection: 3 (Latitude-Longitude)
  zone:       0
  datum:      wgs84
  ellipsoid:  wgs84
  north:      0:13:32.187577N
  south:      0:13:32.175318N
  west:       73:12:48.504873E
  east:       73:12:48.518218E
  nsres:      0:00:00.012259
  ewres:      0:00:00.013345
  rows:       1
  cols:       1
  cells:      1
  }}}

 looking at resolution and the w-e or n-s borders:

 the difference seems to be at the 3rd decimal number of the seconds.

 That's maybe the reason the wxgui display can't map the polygon.

 And also area calculations may have some issues.

--
Ticket URL: <https://trac.osgeo.org/grass/ticket/3356#comment:4>
GRASS GIS <https://grass.osgeo.org>