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Using GCTP in IDL instead of MAP_SET [message #41076]

Wed, 22 September 2004 12:26

Mark Conner
Messages: 9
Registered: September 2004

Junior Member

Hi,

I'm involved in a project where we will be writing 2D grids in a standard
map projection (lat/lon or polar stereo for now) into an HDF-EOS file.
HDF-EOS uses GCTP mapping to set up the coordinate systems.

I am used to setting up WINDOW for the x/y dimensions of the grid and
MAP_SET with the LIMITS keyword (plus other parameters) to set up the map
transform and CONVERT_COORD to do the forward and inverse coordinate
transforms.

Now I would like to use MAP_PROJ_INIT instead, so I can store the map
structure information in the appropriate place in the HDF-EOS file. Given
that I have satellite data with its own non-standard projection, how do I
use MAP_PROJ_INIT to set up a grid with x by y grid points and corners at
specified lat/lon points? I think once I do that correctly, I can transform
the satellite data into the grid and then store it in HDF-EOS.

- Mark

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Using GCTP in IDL instead of MAP_SET

By: Mark Conner on Wed, 22 September 2004 12:26

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