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how to initialize a projection from its specification? [message #83950]

Wed, 17 April 2013 09:20

natha
Messages: 482
Registered: October 2007

Senior Member

Hi guys,

How can I initialize a mapping projection in IDL using the following specification?
http://www.nco.ncep.noaa.gov/pmb/docs/on388/tableb.html#GRID 130

I want to remap (by bilinear interpolation) one image (that is projected in the specified grid) to another projection, by using MAP_PROJ_IMAGE.

I do have the lat/lon values of the image but it seems that I cannot use MAP_PATCH if my final projection is initialized using MAP_PROJ_INIT.

Any ideas? Thank you for your help
nata

VALUE GRID DESCRIPTIONS
130 () Regional - CONUS (Lambert Conformal) - 13 km

Nx 451
Ny 337
La1 16.281N
Lo1 233.862E = 126.138W
Res. & Comp. Flag 0 0 0 0 1 0 0 0
Lov 265.000E = 95.000W
Dx 13.545087 km
Dy 13.545087 km
Projection Flag 0
Scanning Mode (bits 1 2 3) 0 1 0
Latin 1 25.000N
Latin 2 25.000N (tangent cone)
Lat/Lon values of the corners of the grid
(1,1) 16.281N, 126.138W
(1,337) 54.172N, 139.856W
(451,337) 55.481N, 57.383W
(451,1) 17.340N, 69.039W
Pole point
(I,J) (249.315, 1051.539)

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