[GRASS-dev] [GRASS GIS] #2718: v.mkgrid: one row lost if map extent is less than half that row size

[GRASS GIS]

#2718: v.mkgrid: one row lost if map extent is less than half that row size
-------------------------+---------------------------------
 Reporter:  neteler      |      Owner:  grass-dev@…
     Type:  defect       |     Status:  new
 Priority:  normal       |  Milestone:  7.0.2
Component:  Vector       |    Version:  svn-releasebranch70
 Keywords:  v.mkgrid     |        CPU:  Unspecified
 Platform:  Unspecified  |
-------------------------+---------------------------------
 When creating a grid and the map extent does not reach more than half of a
 row size, the resulting grid is one row too small (see screenshot).


 {{{
 # NC data
 g.region vector=zipcodes_wake -p
 v.mkgrid map=grid_10km box=10000,10000
 d.vect -c zipcodes_wake
 d.vect grid_10km type=boundary
 }}}

 The issue is likely the rounding in line 329 of mainc.:

 {{{
         if ((int)(grid_info.num_vect_rows / 2.0 + 0.5) !=
 grid_info.num_rows)
 }}}

 or the code closeby.

 Solution: add a flag to enforce full coverage using a different rounding
 method.

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2718>
GRASS GIS <http://grass.osgeo.org>