[GRASS-user] temporal mapcalc 3hour precipitation to hourly

maning sambale emmanuel.sambale at gmail.com
Tue Dec 2 04:30:23 PST 2014


Hi,

A have a temporal raster of 3hourly_rainrate.
> t.rast.list input=3hr_rainrate
name|mapset|start_time|end_time
3hr_rainrate_2014-11-13_0300|PERMANENT|2014-11-13 03:00:00|2014-11-13 06:00:00
3hr_rainrate_2014-11-13_0600|PERMANENT|2014-11-13 06:00:00|2014-11-13 09:00:00

The values are the average hourly rainfall at 3hr snapshot.  I want to
get the total rainfall which is (raster * 3).  Using t.rast.mapcalc, I
get this error:

> t.rast.mapcalc input=3hr_rainrate output=hourly_rainrate basename=hourly_rainrate expression="(3hr_rainrate) * (3.0)" nprocs=4
Start temporal sampling
Start mapcalc computation
Invalid map <3hr_rainrate_2014>
Invalid map <13_0300>
Parse error
ERROR: parse error
...
ERROR: parse error
Invalid map <3hr_rainrate_2014>
Invalid map <13_1200>
Parse error
ERROR: parse error
ERROR: Error while mapcalc computation

I'm using GRASS 7.0.0.  Thanks!



-- 
cheers,
maning
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