MIL-PRF-89202B
of grid labels. See APPENDICES B and C for examples of minute
tick subdivisions.
d. Five second ticks subdividing one minute are shown
at two selected locations on each neatline, central meridian,
and central parallel. Locations are selected based on clarity
of presentation with preference given to open water areas.
3.9.2
Graticule labeling.
a. Geographic coordinates showing degrees, minutes,
and seconds are shown on all four neatline corners. The
appropriate suffix N, S, E, or W is shown with full coordinates
values (degrees, minutes, and seconds) at the lower left and
upper right corners.
b. Parallels, meridians and minute tick labels are
shown along the neatline. The subdivided central parallel and
meridian labels show the degree and minute values at the
neatline.
c. Every minute tick on the subdivided central
parallel and meridian shows a minute label except at the 4
minute graticule, which shows a label with the whole degree and
minute value.
d. Five second subdivision tick labels are shown at
the 15", 30", and 45" ticks.
3.9.3
Additional graticule information. Refer to APPENDICES
B and C, Style Sheets for additional information about labeling
and subdivision.
3.9.4 Exception to graticule intervals. Although meridians
and parallels are usually shown at 4 minute intervals, this
interval becomes too dense (approximately 3 inches) at 60
degrees latitude and greater. Whenever the graticule interval
measures less than 7.6 cm (3 inches), the interval is increased.
For Littoral Planning Charts at 60 degrees latitude and greater,
the interval for meridians is 10 minutes and the interval for
parallels is 5 minutes.
3.9.5
Graticule and grid accuracy.
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