{Spam?} 1 degree ocean mask

[Diandong Ren]

One choice is the USGS DEM  (degital elevation map:
http://edc.usgs.gov/guides/dem.html) tiles. Just set the -9999.9 =0 and all
else 1.
The resolution is much higher than 1x1 deg. But, for just producing a
land/sea mask, you can loosen it easily.

Diandong Ren
OU/SoM

----- Original Message -----
From: "Ben Burford" <benb at RESTEC.OR.JP>
To: <GRADSUSR at LIST.CINECA.IT>
Sent: Monday, February 20, 2006 11:27 PM
Subject: {Spam?} 1 degree ocean mask


> Hello,
>
> I want to apply a mask over the ocean for my 1 degree by 1 degree global
> gridded data.  I think I can simply do the following:
> d maskout(data,land(t=1)-1)
> where land is a mask data file with 1 over land and 0 over ocean.
>
> Does anyone know where I can find a 1 degree by 1 degree global gridded
> land/ocean mask file?
>
> As I understand it basemap.gs will do masking of graphics, but not of the
> the data, and I want to mask the data during calculations.
>
> Thank you very much,
>
> Ben
>