[GRASS-user] r.mapcalc appears to have changed behavior

[Jim Mochel]

I had made a number of scripts that worked fine in the 6.4.0 build 6 but
appear to have problems with the same code in later revisions:

The method used to take about 6-8 secs and produce about what you would
expect on the screen. Now the same calculation takes 0 seconds the file is
radically changed. See the before and after below.

Any help would be greatly appreciated.
Thanks
Jim Mochel

r.mapcalc na_dem_sub_20 = na_dem_input - 20


+----------------------------------------------------------------------------+
 | Layer:    na_dem                         Date: Sat Sep 24 17:37:59 2011
 |
 | Mapset:   PERMANENT                      Login of Creator: jmochel
  |
 | Location: wgs84
 |
 | DataBase: /home/jmochel/grassdata
 |
 | Title:     ( na_dem )
 |
 | Timestamp: none
 |
 |----------------------------------------------------------------------------|
 |
 |
 |   Type of Map:  raster               Number of Categories: 65535
  |
 |   Data Type:    CELL
  |
 |   Rows:         8384
  |
 |   Columns:      9102
  |
 |   Total Cells:  76311168
  |
 |        Projection: x,y
  |
 |            N:    4384500    S:   -3999500   Res:  1000
  |
 |            E:    4639500    W:   -4462500   Res:  1000
  |
 |   Range of data:    min = 0  max = 65535
  |
 |
 |
 |   Data Description:
 |
 |    generated by r.in.gdal
 |
 |
 |
 |   Comments:
 |
 |    r.in.gdal input="/home/jmochel/gis/raw-data/hydo1k/na_dem.bil" outpu\
  |
 |    t="na_dem"
 |
 |
 |
 +----------------------------------------------------------------------------+


r.info map=na_dem_sub_20

 +----------------------------------------------------------------------------+
 | Layer:    na_dem_sub_20                  Date: Mon Sep 26 23:06:03 2011
 |
 | Mapset:   PERMANENT                      Login of Creator: jmochel
  |
 | Location: wgs84
 |
 | DataBase: /home/jmochel/grassdata
 |
 | Title:     ( na_dem_sub_20 )
  |
 | Timestamp: none
 |
 |----------------------------------------------------------------------------|
 |
 |
 |   Type of Map:  raster               Number of Categories: 610
  |
 |   Data Type:    CELL
  |
 |   Rows:         1
 |
 |   Columns:      1
 |
 |   Total Cells:  1
 |
 |        Projection: x,y
  |
 |            N:          1    S:          0   Res:     1
  |
 |            E:          1    W:          0   Res:     1
  |
 |   Range of data:    min = 610  max = 610
  |
 |
 |
 |   Data Description:
 |
 |    generated by r.mapcalc
 |
 |
 |
 |   Comments:
 |
 |    na_dem_input at PERMANENT - 20
  |
 |
 |
 +----------------------------------------------------------------------------+
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