[gradsusr] how to obtain areal average in a given shapefile

[Marcelino II Villafuerte]

Hi all,

Aside from reading and writing a shapefile in grads (
http://www.iges.org/grads/gadoc/gadocindex.html)
is it also possible to produce an areal average [aave() function] of a
specific parameter e.g. rainfall,
in a specific province or region prescribed in a shapefile?


Thanks in advance!
-- 
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Marcelino Q. Villafuerte II
Weather Specialist I
IAAS, CAD
PAGASA-DOST
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