GRID (Draw a reference grid in plotting window)

The GRID command draws a reference grid in the currently defined plotting window. The reference grid can be drawn as solid lines, dotted lines, or as crosses at the intersections of the grid. If a cartographic projection has been defined by the PROJ command or in the MDF file, a cartographic reference grid based on lines of longitude and latitude can be drawn.

Command Syntax

GRID gopt,dx,dy,ddx,ddy,att

Command Parameters:

gopt	Grid drawing style.
0	Does not draw the grid, rather it sets up the grid increments for later use with ALAT and ALON.
1	Map coordinate reference grid as dotted lines.
2	Map coordinate reference grid as crosses.
3	Map coordinate reference grid as solid lines.
-1	Long/lat. reference grid as dotted lines.
-2	Long/lat. reference grid as crosses.
-3	Long/lat. reference grid as solid lines.
dx,dy	Separation between grid lines in the X and Y directions. The separation must either be in world, ground, coordinates for positive gopt, or in degrees.mmss for long/lat. grids (negative gopt). The default is the same as may have been defined by previous BARV, ANOX, ANOY, ALON or ALAY commands.
ddx,ddy	These define the separations between dots in the X and Y directions for dotted grids, or the separation between curved line segments when drawing solid long/lat lines. The value of ddx can also be used to set the bar length of crosses (the full cross size is twice this value). The default is 5 or 10 dots between grid lines for world, ground, coordinate grids, and 8 points between grid lines for long/lat grids.
att	The attribute to use to draw grid lines.

Example:

MDFF m1

PROJ UTM17

RECT 12

GRID -2,2.3,2.3,,,grid=kt100

ALON

ALAT

This will draw a longitude-latitude grid at increments of 2'30". The grid will then be annotated along the edges using the ALON and ALAT commands.

This command is part of the MAPPLOT GX.