CHARACTER SPACE_TYPE
Define the type of spacing for the contour levels
LIN Linear spacings. The Zero contour is always omitted.
LOG Exponential spacing
NONE No contour levels at all (same as DO_CONTOUR = NO)
USER Keep the contour levels specified by command LEVELS
For LOG case, see HELP LEVELS EXPO in the GreG internal help.
As a backward compatibility, a negative spacing is a convention to use
the current contour levels, although using SPACE_TYPE = USER should be
preferred.
Gildas manager
2023-06-01