Code 123 - Coded Data Field: Cartographic materials - scale and coordinates (Mandatory) (R)
Indicator 1: Type of Scale Code Indicator 0 Scale indeterminable 1 Single scale 2 Multiple scales 3 Range of scales 4 Approximate scale Indicator 2: blank
Subfield codes $a Type of Scale (Mandatory, Not repeatable)
a = linear scale b = angular scale z = other type of scale (e.g., time scale, quantitative statistical scale)
$b Constant Ratio Linear Horizontal Scale (Repeatable) $c Constant Ratio Linear Vertical Scale (Repeatable) $d Co-ordinates Westernmost Longitude (Not repeatable) $e Co-ordinates Easternmost Longitude (Not repeatable) $f Co-ordinates Northernmost Latitude (Not repeatable) $g Co-ordinates Southernmost Latitude (Not repeatable)
Each subfield is fixed at 8 characters: Character position 0
Hemisphere
w = west e = east n = north s = south Character positions 1 to 3
Degree: 3 numeric characters, right justified, filled with zeros
Character positions 4 to 5
Minute: 2 numeric characters, right justified, filled with zeros
Character positions 6 to 7
Second: 2 numeric characters, right justified, filled with zeros
$h Angular Scale (Repeatable)
A 4 character number right justified and filled with zeros, giving the scale in terms of millimetres to a degree
$i Declination Northern Limit (Not repeatable) $j Declination Southern Limit (Not repeatable) $k Right ascension Eastern Limits (Not repeatable) $m Right ascension Western Limits (Not repeatable)
Character positions 0 to 1
Hour: 2 numeric characters, right justified, filled with zeros
Character positions 2 to 3
Minute: 2 numeric characters, right justified, filled with zeros
Character positions 4 to 5
Second: 2 numeric characters right justified, filled with zeros
$n Equinox (Not repeatable) $o Epoch (Not repeatable)