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How to creat the Geographic Coordinate System with IDL? [message #53622]

Fri, 20 April 2007 04:54

hhuxz
Messages: 2
Registered: April 2007

Junior Member

Hi everyone,
Currently I am working on the Geographic Coordinate System whit
IDL6.3.

The Map_Proj_Inti() Fuction does have the Datum keyword inside but
this keyword JUST defined the Ellipsoid's Semimajor and Semiminor,
there' seems NO WAY to apply x, y, z offsets form the WGS84 datum to
get a LOCAL DATUM. But a local Datum is realy important to the
Geographic Coodinate System.

I have checked the !Map system variable, hope that I can change the !
Map variable Directly to fit the problem. But I don't know what the !
Map strtucture's fields realy represented.

Does anyone know something about how to creat the Geographic
Coordinate System with IDL and any help will be appreciated.

Thanks a lot!

Regards,
Huxz

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