[Rd] Start-up messages when Importing from a package

[Mauricio Zambrano-Bigiarini]

Dear List,

I'm building a package  that uses 2 functions of the 'sp' package, and I 
declared them in my NAMESPACE file as follow:


importFrom("sp", proj4string, coordinates)


The package is built without any problem, but when I load the package, I 
get the following message:

"
Loading required package: sp

         Note: polygon geometry computations in maptools
         depend on the package gpclib, which has a
         restricted licence. It is disabled by default;
         to enable gpclib, type gpclibPermit()

Checking rgeos availability as gpclib substitute:
TRUE
"


However, if I only load the 'sp' package (in a different R session), I 
don't get any warning message.


Is there any way I can prevent the warning message appears when I load 
my package ?


Thanks in advance for any help,


Mauricio Zambrano-Bigiairni
-- 
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FLOODS Action
Land Management and Natural Hazards Unit
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European Commission, Joint Research Centre (JRC)
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