[GRASS-dev] Re: [GRASS GIS] #392: backport G_is_c_null_value() to devbr6

[GRASS GIS]

#392: backport G_is_c_null_value() to devbr6
----------------------+-----------------------------------------------------
  Reporter:  hamish   |       Owner:  grass-dev at lists.osgeo.org
      Type:  task     |      Status:  new                      
  Priority:  blocker  |   Milestone:  6.5.0                    
 Component:  default  |     Version:  svn-develbranch6         
Resolution:           |    Keywords:                           
  Platform:  All      |         Cpu:  All                      
----------------------+-----------------------------------------------------
Changes (by hamish):

  * priority:  major => blocker
  * milestone:  6.4.0 => 6.5.0

Comment:

 It is worse than I thought. Any module creating a map containing nulls in
 grass 6.5 currently generates a broken map.

 {{{
 G65> r.mapcalc 'nullmap = null()'
  100%

 G65> r.info -r nullmap
 min=-2147483648
 max=-2147483648

 G65> r.univar nullmap
  100%
 total null and non-null cells: 2654802
 total null cells: 0

 Of the non-null cells:
 ----------------------
 n: 2654802
 minimum: 0
 maximum: 0
 range: 0
 mean: 0
 mean of absolute values: 0
 standard deviation: 0
 variance: 0
 variation coefficient: nan %
 sum: 0
 }}}

 If you read the above map in grass64 or grass7 you get the same r.info and
 r.univar output.

 :-(


 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/392#comment:5>
GRASS GIS <http://grass.osgeo.org>