[GRASS-dev] [bug #4522] (grass) r.series: error in row of input map is non-fatal giving wrong results

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this bug's URL: http://intevation.de/rt/webrt?serial_num=4522
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Subject: r.series: error in row of input map is non-fatal giving wrong results

Hi,


a problem with r.series:

One of my input maps has a corruption in it (disk flaw??), using r.series
(method=average) I see this error:

WARNING: error reading compressed map [dbt_corrupt] in mapset
         [sw2006f_icw], row 1465

but the process continues to completion and I get a resulting map which looks
ok, but is subtly wrong.


G61> r.univar dbt_mean_corrupted
 100%
total null and non-null cells: 11160000
total null cells: 9626502

Of the non-null cells:
----------------------
n: 1533498
minimum: 0
maximum: 1.8731
range: 1.8731
mean: 0.810907
standard deviation: 0.361051
variance: 0.130358
variation coefficient: 44.5243 %
sum: 1243524.7052483591



G61> r.univar dbt_mean_good
 100%
total null and non-null cells: 11160000
total null cells: 9629925

Of the non-null cells:
----------------------
n: 1530075
minimum: 0.2611
maximum: 1.8731
range: 1.612
mean: 0.812793
standard deviation: 0.359435
variance: 0.129194
variation coefficient: 44.2223 %
sum: 1243634.0932001742


As this was called from a script it is lucky I noticed..

The read error should trigger a G_fatal_error().


thanks,
Hamish


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