123 Cartographic Materials - Scale and Coordinates

Field Definition

This field contains the scale and co-ordinate data as entered in field 206 but in coded form.

Occurrence

Mandatory. Repeatable when an item contains material in different scales and with different co-ordinates.

Indicators

Indicator 1: Type of Scale Code Indicator

This indicator shows whether single or multiple scales are recorded.

Indicator 2: blank (not defined)

Subfields

123$a Type of Scale

A one-character code indicating the type of scale. (Mandatory and not repeatable)

123$b Constant Ratio Linear Horizontal Scale

The horizontal scale in the form of the denominator of a representative fraction. Used for planetary as well as terrestrial cartographic items. (Optional and repeatable)

123$c Constant Ratio Linear Vertical Scale

The vertical scale in the form of the denominator of a representative fraction. Used for planetary as well as terrestrial items. (Optional and repeatable)

123$d Co-ordinates - Westernmost Longitude

Co-ordinates for planetary or terrestrial items. Each subfield is fixed at 8 characters. (Optional and not repeatable)

123$e Co-ordinates - Easternmost Longitude

Co-ordinates for planetary or terrestrial items. Each subfield is fixed at 8 characters.

(Optional and not repeatable)

123$f Co-ordinates - Northernmost Latitude

Co-ordinates for planetary or terrestrial items. Each subfield is fixed at 8 characters. (Optional and not repeatable)

123$g Co-ordinates - Southernmost Latitude

Co-ordinates for planetary or terrestrial items. Each subfield is fixed at 8 characters.

(Optional and not repeatable)

123$h Angular Scale

The angular scale of celestial maps in the form of a 4 character number right justified and filled with zeros, giving the scale in terms of millimetres to a degree. (Optional and repeatable)

123$i Declination - Northern Limit

Co-ordinates for celestial cartographic items. Subfields $i and $j are each 8 characters long and contain the same components as subfields $f and $g (see above) except that character position 0 contains a plus sign (for the northern celestial hemisphere) or a minus sign (for the southern celestial hemisphere). (Optional and not repeatable)

123$j Declination - Southern Limit

Co-ordinates for celestial cartographic items. Subfields $i and $j are each 8 characters long and contain the same components as subfields $f and $g (see above) except that character position 0 contains a plus sign (for the northern celestial hemisphere) or a minus sign (for the southern celestial hemisphere). (Optional and not repeatable)

123$k Right ascension - Eastern Limits

Subfields $k and $m are each 6 characters long. (Optional and not repeatable)

123$m Right ascension - Western Limits

Subfields $k and $m are each 6 characters long. (Optional and not repeatable)

123$n Equinox

The equinox for celestial cartographic items with the year entered according to the Gregorian calendar as a four character date right justified with zeros. (Optional and not repeatable)

123$o Epoch

The epoch for celestial cartographic items with the year entered according to the Gregorian calendar as a four character date right justified with zeros. (Optional and not repeatable)

Notes on Field Contents

When the scale is indeterminable, the field contains only subfield $a and co-ordinates if they are present.

When the item is multipart and has multiple horizontal and/or vertical scales, all of the scales are given in repeating subfields. However, for three or more scales, the range of scales can be given in subfields $b or $c; the smaller denominator is recorded in the first occurrence of the particular subfield and the larger in the second occurrence.

When the co-ordinates for a map or plan are given in terms of a centre point rather than outside limits, the longitude and latitude that form the central axes are each recorded twice, in subfields $d and $e (longitude) and subfields $f and $g (latitude). Similarly, when the declination and right ascension for celestial charts are given relative to the centre of the chart rather than to its limits, they are each recorded twice, in subfields $i and $j (declination) and subfields $k and $m (ascension).

Subfield $a Type of Scale

(1) Type of Scale

a linear scale

b angular scale

z other type of scale (e.g., time scale, quantitative statistical scale)

Subfield $b Constant Ratio Linear Horizontal Scale

Subfield $c Constant Ratio Linear Vertical Scale

Subfield $d Co-ordinates - Westernmost Longitude

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $e Co-ordinates - Easternmost Longitude

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $f Co-ordinates - Northernmost Latitude

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $g Co-ordinates - Southernmost Latitude

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $h Angular Scale

Subfield $i Declination - Northern Limit

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $j Declination - Southern Limit

(1) Hemisphere

one-character code.

e east

n north

s south

w west

(2) Degree

3 numeric characters, right justified, filled with zeros.

(3) Minute

2 numeric characters, right justified, filled with zeros.

(4) Second

2 numeric characters, right justified, filled with zeros.

Subfield $k Right ascension - Eastern Limits

(1) Hour

2 numeric characters, right justified, filled with zeros.

(2) Minute

2 numeric characters, right justified, filled with zeros.

(3) Second

2 numeric characters right justified, filled with zeros.

Subfield $m Right ascension - Western Limits

(1) Hour

2 numeric characters, right justified, filled with zeros.

(2) Minute

2 numeric characters, right justified, filled with zeros.

(3) Second

2 numeric characters right justified, filled with zeros.

Subfield $n Equinox

Subfield $o Epoch

Fields or other related entities

206 Material Specific Area: Cartographic Materials - Mathematical Data

Scale and co-ordinates are recorded in field 206 in the form prescribed by ISBD (CM).

Examples

Ex. 1:

Flat maps and globes:

123 l#$aa$b253440$de0790000$ee0860000$fn0200000$gn0120000

A map covering part of India which is 4 inches to the mile (1:253440) longitude 79°E to 86°E, latitude 20°N to 12°N.

Ex. 2:

123 2#$aa$bl50000$b25000$de0150000$ee0173045$fn0013012$gs0023035

A map of part of Zaire of linear scale of 1:150000 and 1:25000, longitude 15°E to 17°30'45 E; latitude 1°30'12 N to 2°30'35 S.

Ex. 3:

Relief models:

123 2#$aa$b744080$c96000$de1193000$eel220000$fn0250000$gn0220000

A relief map of Taiwan with horizontal scale of 1:744080 and vertical scale of 1:96000; longitude 119°30'E to 122°E, latitude 25°N to 22°N.

Ex. 4:

123 2#$aa$b90000$cl0000$dwll20000$ewl090000$fn0600000$gn0490000

A relief map of part of Alberta and Saskatchewan in Canada with a horizontal scale of 1:90000 and a vertical scale of 1:10000; longitude 109°W to 112°W; latitude 60°N to 49°N.

Ex. 5:

Celestial chart:

123 0#$ab$i-0160000$j-0490000$k163000$m193000$nl950$o1948

A celestial chart with an angular scale, with declination -16° to -49°, right ascension from 16 hr 30 min to 19 hr 30 min, equinox 1950, epoch 1948.