GRID_GLOBE
Name
GRID_GLOBE
Purpose
This procedure displays a 2D array onto a globe.
Category
SNOE, image, display
Calling Sequence
GRID_GLOBE, DATA
Inputs
DATA: A 2D FLOAT array.
Optional Inputs
None
Keyword Parameters
LAT: The center latitude of the image [ 0 ]
LONG: The center longitud of the image [ 0 ]
LV: The MAX (Large Value) to scale the data with [ max( data ) ]
SV: The MIN (Small Value) to scale the data with (only used
with LOG) [ LV / 20. ]
CONTINENTS: Set this keyword to draw the continents
GGRID: Set this keyword to draw a Geographic grid
MGRID: Set this keyword to draw a Magnetic grid
CCOLOR:The colortable index of the Continents [ 0 ]
GCOLOR:The colortable index of the Geo Grid [ 0 ]
MCOLOR:The colortable index of the Mag Grid [ 255 ]
LOG: Set this kewyord to image the log of the data
ROT: Set this keyword to the number of degrees to rotate the globe
XSIZE: Xsize of the image (pixels) [ 400 ]
YSIZE: Ysize of the image (pixels) [ 400 ]
PS: Set this keyword to produce a Postscript image
EPS: Set this keyword to produce a Encapsulated Postscript image
GIF: Set this keyword to produce a GIF image
FILENAME: The name of the output file (no extension) [ gg5.* ]
NOX: Set this keyword to NOT display the image to X
_EXTRA is used for the following routines:
MAP_SET, MAP_IMAGE, MAP_CONTINENTS, MAP_GRID, MAG_GRID,
LOAD_CGM, DEVICE, PLOTS, and possibly others...
Outputs
An image
Side Effects
Modifies the !MAP system variable.
Modifies the Z buffer
Modifies the DEVICE setting if /PS or /EPS set
Restrictions
None known
Procedure
See MAP_SET and "MAP_PROJECTIONS" in the IDL documentation.
Example
To get a first brief look at the data, use the following code,
which produces a cylindrica projection with the continents for
reference.
GRID_GLOBE, data, /cont
To produce a globe centered on the North Magnetice Pole,
orthographic projection, with geographic grid, magnetic grid, and
continents drawn on ... And produce output in both GIF and PS
format (named 'test.gif' and 'test.ps' respectively), with the
data BILINEARLY smoothed ... And the continents drawn thick, and
the auroral oval drawn VERY thick, and the continents drawn in
BLUE (index 10 in the SNOE color table), use this code:
GRID_GLOBE, data, lat=81.5, long=277.5, /ortho, /gg,
/mg, /cont, /PS, /GIF, fname='test', /BILINEAR,
MLINETHICK=2, OVAL=4, CCOLOR=10
Modification History
Written by: KDM, 1998 - 2001
2002-07-23. KDM. Added documentation. Modified to run on the 24 bit
displays at GI. Cleaned up code. Put into RCS.