[GRASS-user] r.info problem (bad values) for very small ranges

Jarek Jasiewicz jarekj at amu.edu.pl
Mon Mar 17 02:42:19 EDT 2008


I have raster created in R with folowing summary

Data attributes:
    st_01all        
 Min.   :-3.661e-21 
 1st Qu.: 1.529e-10 
 Median : 2.056e-07 
 Mean   : 2.339e-06 
 3rd Qu.: 2.840e-06 
 Max.   : 5.070e-05 
 NA's   : 4.780e+03 


Max value is. Max.   : 5.070e-05

The same raster in grass 6.3 svn (last compilation week ago):
r.info -r map=st_01all at st_an2
min=-0.000000
max=0.000063

and the same raster after multypied by 1 000 000
r.info -r map=st_01all_mult at st_an2
min=-0.000000
max=50.698170

now max value is OK, so why before it show bad values

Jarek.

P.S I cannot reproduce it on "spearfish" becouse there are no maps with 
similar values



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