Keywords: greg

Next: Variables and Images: Up: The Data Structure Previous: Table Format : Contents Index

### Two-Dimensional Regular Grid Array

For mapping purpose, one need to store RG=f(I,J) data into the Regular Grid array and to define a linear correspondence between the User Coordinate Space and the indices I and J, X=x(I) and Y=y(I). All this is done using command `RGDATA` to read a purposely formatted file. Contrary to the X Y Z buffers which are Real*8, the Regular Grid RG array is declared Real*4 as there is usually no meaning in defining contours with very high precision.

The Regular Grid array is loaded using command `GREG2RGDATA Name [/VARIABLE]`
where Name is a variable or the input file name if the `/VARIABLE` option is not present.

Subsections

- Variables and Images:
- RGDATA File Format :