GRID

LABELFORMAT [DD|DDMM|DDMMSS|C format string]

Format of the label. “DD” for degrees, “DDMM” for degrees minutes, and “DDMMSS” for degrees, minutes, seconds. A C-style formatting string is also allowed, such as “%g°” to show decimal degrees with a degree symbol. The default is decimal display of whatever SRS you’re rendering the GRID with.

MINARCS [double]

The minimum number of arcs to draw. Increase this parameter to get more lines. Optional.

MAXARCS [double]

The maximum number of arcs to draw. Decrease this parameter to get fewer lines. Optional.

MININTERVAL [double]

The minimum number of intervals to try to use. The distance between the grid lines, in the units of the grid’s coordinate system. Optional.

MAXINTERVAL [double]

The maximum number of intervals to try to use. The distance between the grid lines, in the units of the grid’s coordinate system. Optional.

MINSUBDIVIDE [double]

The minimum number of segments to use when rendering an arc. If the lines should be very curved, use this to smooth the lines by adding more segments. Optional.

MAXSUBDIVIDE [double]

The maximum number of segments to use when rendering an arc. If the graticule should be very straight, use this to minimize the number of points for faster rendering. Optional, default 256.

The following is an example of a GRID object in use:

LAYER
 NAME "grid"
 METADATA
   "DESCRIPTION" "Grid"
 END
 TYPE LINE
 STATUS ON
 CLASS
   NAME "Graticule"
   COLOR 0 0 0
   LABEL
     COLOR  255 0 0
     FONT "fritqat"
     TYPE truetype
     SIZE 8
     POSITION AUTO
     PARTIALS FALSE
     BUFFER 5
     OUTLINECOLOR 255 255 255
   END
END
PROJECTION
    "init=epsg:4326"
END
GRID
  LABELFORMAT "DDMM"
#  LABELFORMAT '%g°'  # dec degrees with symbol
  MAXARCS 10
  MAXINTERVAL 10
  MAXSUBDIVIDE 2
#  LABELFORMAT '%7.0f m'  # nice if a projected SRS used
#  MININTERVAL 20000
#  MAXSUBDIVIDE 2
END
END # Layer