034 Coded Mathematical Data:

1st indicator: Type of scale

0 No scale given (1)

1 Single scale (2)

3 Range of scales

Most common subfield codes:

a Category of scale

a Linear scale

b Angular scale

c Other type

b Horizontal scale

c Vertical scale

d Westernmost longitude

e Easternmost longitude

f Northernmost latitude

g Southernmost latitude

p Equinox