Position Code Table

Marsden Square Chart (World)

[MSQ World Map]

The number in the chart shown the Marsden Square Number.

Marsden Square Subdivisions

[MSQ Subdivisions]

Quadrant of position

Code	Descriptions
1	Latitude is North, Longitude is East
3	Latitude is South, Longitude is East
5	Latitude is South, Longitude is West
7	Latitude is North, Longitude is West

Third mesh code

This code is a part of JIS X 0410:1976 "Grid square code".
Format of this code is as follows :

AABBCDEF

Code	Name	Descriptions
AA	1st Mesh(Lat.)	(Southernmost Latitude) * 1.5
BB	1st Mesh(Lon.)	(Westernmost Longitude) - 100
CD	2nd Mesh	see Fig.1
EF	3rd Mesh	see Fig.2

[2nd and 3rd mesh map]

GEBCO Mesh Code

GEBCO Mesh Code can be easily identified by constructing a nine-digit number. The components of this number, in order of their construction are described as follows :

Q_c L G G D₁ D₂ H Q O

Code	Length	Descriptions
Q_c	1	Quadrant number 1 : Latitude is North , Longitude is East 3 : Latitude is South , Longitude is East 5 : Latitude is South , Longitude is West 7 : Latitude is North , Longitude is West
L	1	Tens digit of degrees latitude
G G	2	Hundreds and tens digit of degrees longitude
D₁	1	One digit of degrees latitude
D₂	1	One digit of degrees longitude
H	1	30 minutes mesh (1 to 4)
Q	1	15 minutes mesh (1 to 4)
O	1	7.5 minutes mesh (1 to 4)

[GEBCO sub mesh]

Last update : September 24, 1997