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Regridding NCEP Data [message #90783] Wed, 15 April 2015 11:44
Chase Calkins is currently offline  Chase Calkins
Messages: 4
Registered: February 2014
Junior Member
Hello,

I'm trying to regrid NCEP text file data from a 2.5x2.5 to a 2x2.5 so that

x = 144
y = 91 (originally 73)

I had been trying to use David Fanning's 'Gridding Map Data'
http://www.idlcoyote.com/code_tips/usegriddata.html
but it is for a Polar Stereographic and I was needing to use the Mercator

I thought changing
x0 = -12756200.0D (length in meters for the radius of earth in equatorial)
x1 = 12756200.0D
y0 = -12713600.0D (length in meters for the radius of earth in polar)
y1 = 12713600.0D
xdim = 144
ydim = 91
would work but it's not quite right. Is there a set of variables that is know for those values or is there a better way to regrid using IDL.

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