[GRASS-dev] results in winGRASS7 32bit vs 64bit: should they be identical?

[Helmut Kudrnovsky]

>Like this you check if the difference is very small and below the
>acceptable threshold.
>In C, we use GRASS_EPSILON for these comparisons. 

now done with GRASS_EPSILON   1.0e-15

r.mapcalc expression=difftestepsilon = if( abs( accum32bit at accumtest -
accum64bit at accumtest) <= 1.0e-15, 1 , 100 )

attached a screenshot of this map

accum_diff_wingrass32bitvs64bit.png
<http://osgeo-org.1560.x6.nabble.com/file/n5243286/accum_diff_wingrass32bitvs64bit.png>  



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best regards
Helmut
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