5.3 CARTOGRAPHIC MATERIALS, MATHEMATICAL DATA AREA

(CM 3)

5.3A. Preliminary rule

5.3A1. Scope.

Apply these rules, at all levels of description, to all cartographic materials regardless of form or format (e.g., paper, computer data, microform).

5.3A2. Punctuation

For instructions on the use of spaces before and after prescribed punctuation, see 1.0C.
Precede each occurrence of this area by a full stop, space, dash, space.
Precede the projection statement by a semicolon.
Enclose the statement of coordinates and equinox in one pair of parentheses.
If both coordinates and equinox are given, precede the statement of equinox by a semicolon.
Precede the statement of epoch by a comma.

(CM 3A1)

5.3A3.

Use English words and abbreviations in this area.

(CM 3A2)

5.3A4.

This area is repeatable.

Scale 1:50 000 (W 95°10’–W 94°18’/N 50°30’–N 49°45’). - Scale 1:50 000 (W 93°30’–W 92°30’/N 50°00’–N 49°45’)

Scale 1:250 000 (W 80°–W 78°/N 47°–N 46°). - Scale 1:50 000 (W 80°00’–W 78°30’/N 46°45’–N 46°00’)

5.3B. Statement of scale

(CM 3B)

5.3B1.

Give the scale¹ of the unit being described² (except as noted below) as a representative fraction (RF) expressed as a ratio (1: ). Precede the ratio by Scale. Give the scale even if it is already recorded as part of the title proper or other title information.

Scale 1:1 900 800

Scale 1:10 000

Scale ca. 1:25 000
(Ca. appears with the RF on the map)

If a scale statement (i.e., verbal) found in the prescribed sources of information is not expressed as a representative fraction, give it as a representative fraction in square brackets.

Scale [1:2 400]
(Scale statement is 200 ft. to 1 in.)

Scale [1:253 440]
(Verbal statement reads: One inch to four miles)

If a representative fraction or other scale statement is found in a source other than the prescribed sources of information, give the scale as a representative fraction in square brackets.

Scale [1:63 360]

If no scale statement is found in the prescribed sources of information or other sources of information, compute³ a representative fraction from a bar graph or a grid or by comparison with a map of known scale, and give it in square brackets preceded by ca.

Scale [ca. 1:250 000]

If no scale can be determined by any of the above means, give Scale indeterminable.

(CM 3B1a-e)

5.3B2.

Optional addition. Give additional scale information that is found on the unit being described, and applies to the whole unit (such as a statement of comparative measures or limitation of the scale to a particular latitude). Use standard abbreviations and numerals in place of words. Precede such additional information by a full stop.

Quote the additional scale information if:

1. the statement presents unusual information that cannot be verified by the person describing the unit or
2. a direct quotation is more precise than a statement in conventional form or

Scale 1:71 723 000. 1 in. equals 1132 statute miles
(Verbal scale = 1:71 723 520)

1. the statement on the unit being described is in error or contains errors.

(CM 3B2)

Scale [ca. 1:12 700] not “10 chains = 1 in.”

5.3B3.

If the unit being described has two scales, give both. Give the scales in the order of predominance. If this does not apply, give the larger scale first.

(CM 3B4)

Scales 1:50 000 and 1:20 000
(For a series containing maps at two scales)

Scales [ca. 1:6 000] and [ca. 1:12 000]
(8 profiles on 3 sheets)

5.3B4.

If the unit being described has three or more scales, and one or two scales clearly predominate, give the predominating scale(s). Make a note (see 5.8B9) specifying that only predominant scales have been recorded. If no scale(s) predominate, give Scales differ. Scales not recorded here may be given in a note (see 5.8B9) or in the Scope and content (see 5.7D).

(CM 3B5)

5.3B5.

Give a statement of scale for celestial charts, maps of imaginary places, views (bird’s-eye views or map views), and maps with nonlinear scales only if the information appears on the unit being described. If the unit being described is not drawn to scale, give Not drawn to scale.

(CM 3B7)

Scale 1’ per 2 cm

Scale 88 mm per 1o

5.3B6.

In describing a relief model, profile or other three-dimensional item or three- dimensional representation, give the vertical scale (specified as such) after the horizontal scale if the vertical scale can be ascertained.

(CM 3B8)

Scale [1:633 600]. Vertical scale [1:60 000]

Scale 1:10 000. Vertical scale 1:1 000

Scale 1:250 000. Vertical scale 1:125 000. Vertical exaggeration 2:1

5.3B7.

If the unit being described consists of data on computer file(s), follow the preceding rules and precede the ratio by Input scale.

Input scale 1:1 000 000

Input scale [ca. 1:500 000]

If the unit being described is composed of unconnected geographic coordinate data (e.g., point data with specific longitude and latitude referencing) then give Scale not applicable (e.g., the coordinates of a number of floating buoys obtained by satellite positioning).

5.3C. Statement of projection

(CM 3C)

5.3C1.

Give the statement of projection if it is found on the prescribed source(s) of information. Use abbreviations as instructed in appendix B and numerals as instructed in appendix C.

(CM 3C1)

; polyconic proj.

; Lambert’s azimuthal equal area proj.

; universal transverse Mercator proj.

; proj. transverse de Mercator

5.3C2.

If all the maps (except ancillary, inset, index, reference, etc., maps) in the unit being described are drawn on the same projection, give the projection as instructed in 5.3C1.

If all the maps in the unit being described are drawn on either of two projections, both projections may be recorded, if desired, connected by and. This rule also applies to a single map drawn using two projections.

; Lambert conformal conic proj., standard parallels 49°N and 77°N and modified polyconic south of latitude 80°

If more than two projections are used, do not include a statement of projection. If considered important, they may be recorded in a note (see 5.8B9).

(CM 3C1, *Appendix* 2)

5.3C3.

Optional addition. Give phrases associated with the projection statement found in the source of information that concern, for example, meridians, and/or parallels, but not ellipsoids. Give information on ellipsoids in a note (see 5.8B9).

(CM 3C2)

5.3D. Optional addition. Statement of coordinates⁴

At the fonds, series or file levels, record coordinates for the maximum coverage provided by the materials in the unit, as long as they are reasonably contiguous.

(W 141° –W 52°/N 90°–N 42°)

(CM 3C2)

5.3D1.

At all levels of description, give coordinates in the following order:

• westernmost extent of area covered (longitude)
• easternmost extent of area covered (longitude)
• northernmost extent of area covered (latitude)
• southernmost extent of area covered (latitude)

(CM 3D1a)

Express the coordinates in degrees (°), minutes (‘), and seconds (“) of the sexagesimal system (360° circle) taken from the Greenwich prime meridian. Precede each coordinate by W, E, N, or S, as appropriate. Separate the two sets of latitude and longitude by a diagonal slash neither preceded nor followed by a space. Separate each longitude or latitude from its counterpart by a dash.

(CM 3D1b)

(E 123°49’–W 122°45’/N 50°00’–N 49°15’)

(W 137°–W 61°/N 84°–N 60°)

(W 180°–E 180°/N 90°–S 90°)
(World map regardless of how centred)

(W 79°40’57’‘–W 79°24’48’‘/N 46°05’36’‘–N 45°54’15’’)

(W 120°00’00’‘–W 112°46’45’‘/N 53°42’57’‘–N 53°30’37’’)

Do not enclose supplied coordinates in square brackets.

For very large scale maps, only one set of coordinates for the centre need be recorded.

(W 117°25’/N 56°10’)

Optionally, give other meridians (prime, local or source) found on the unit being described in the note area (see 5.8B9).

(CM 3D1c)