Federal Geographic Data Committee U.S.

Geological Survey Open-File Report 99–430

Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization PostScript Implementation (filename: of99-430_36-01.eps)

36—MEAN DECLINATION ARROWS

CARTOGRAPHIC SPECIFICATIONS
10° H-6 (14, /, °); H-4 (1, 2)

14 1/2° dot diameter .275 mm; spacing .4 mm

2.25 mm

TH
TRUE NORTH

OR
arrow lineweight .15 mm; length 17.75 mm

IC N
NET
H-4; tracking 50/1000 em

MAG
H-5; tracking 50/1000 em
.75 mm APPROXIMATE MEAN
DECLINATION, 1999

36.1—Magnetic north, east of true north

1° 11/2° 2° 21/2° 3° 31/2° 4°

MAGNETIC NORTH

MAGNETI C NORTH

MAGNE TIC NORTH

MAGN ETIC NORT H

MAG NETI C NORT H

TH
TH
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
MAG NET IC NOR
MAG NET IC NOR
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

41/2° 5° 51/2° 6° 61/2° 7° 71/2°

NO RT H
RTH

NO RTH

NO RT H

H
IC NO RT

IC NO RT

IC NO RT
TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH
TRUE NORTH
MA GN ETI C NO

MA GN ET IC
MA GN ETI C

MA GN ET IC

MA GN ET

MA GN ET

MA GN ET
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

8° 81/2° 9° 91/2° 10° 101/2° 11°

H

RT H
RT H

N O R TH

N O R TH

N O R TH

H
IC NO RT

NORT
TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
TI C NO
TI C NO

ET IC

ET IC

E TI C

E T IC
MA GN ET

M AG NE
M AG NE

M AG N

M AG N

MAGN

MAGN
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

111/2° 12° 121/2° 13° 13 1/2° 14 ° 14 1/2°

TH
TH
H

TH
TH

TH
H
NORT

NORT

TRUE NORTH
TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH

OR
OR
NOR
NOR

OR
IC N
IC N

IC N
E T IC

N E T IC
N E T IC
N E T IC

NET
NET

NET
MAGN

MAG
MAG
MAG

MAG
MAG
MAG

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 APPROXIMATE MEAN DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999
DECLINATION, 1999

15 ° 15 1/2° 16 ° 16 1/2° 17° 17 1/2° 18°

TH

RTH
H
TH

TH
H
TH

TRUE NORTH

TRUE NORTH
ORT

TRUE NORTH
ORT
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

NOR
OR

NOR
OR

NO
IC N
IC N

IC N
IC N

IC

E T IC
IC

NET
NET

NET
NET

NET
NET

GN
MAG
MAG
MAG

MAG
MAG
MAG

MA

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

A–36–1
Federal Geographic Data Committee U.S. Geological Survey Open-File Report 99–430
Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization PostScript Implementation (filename: of99-430_36-02.eps)
36—MEAN DECLINATION ARROWS (continued)
36.1—Magnetic north, east of true north (continued)

18 1/2° 19° 19 1/2° 20° 20 1/2° 21° 21 1/2°

RTH

RTH

RTH

RTH

H
TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
RT

RT

RT
NO

NO

NO

NO

NO

NO

NO
E T IC

E T IC

E T IC

E T IC

E T IC

E T IC

IC
ET
GN

GN

GN

GN

GN

GN

GN
MA

MA

MA

MA

MA

MA

MA
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

22° 22 1/2° 23° 23 1/2° 2 4° 24 1/2° 25°

H
H

H
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

H
H

H
H
TRUE NORTH
RT
RT

RT

RT
RT

RT
RT
NO
NO

NO

NO
NO

NO
NO
IC
IC

IC

IC
IC

IC
IC
ET

ET
ET

ET
ET

ET
ET
GN

GN
GN

GN
GN

GN
GN
MA

MA
MA

MA
MA

MA
MA
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

25 1/2° 26° 26 1/2° 27° 27 1/2° 28° 28 1/2°

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

H
H

H
RT
RT

RT

RT

RT

RT

RT
NO
NO

NO

NO

NO
NO

NO
IC
IC

IC

IC

IC
IC

IC
ET
ET

ET

ET
ET

ET

ET
GN
GN

GN

GN
GN

GN

GN
MA

MA
MA

MA

MA
MA

MA
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 2000 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

29° 29 1/2° 30° 30 1/2° 31° 31 1/2 32°

°

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH
H

H
H

H
RT

RT

RT
RT

RT

RT

RT
NO

NO

NO

NO
NO

NO
NO
IC

IC

IC

IC

IC
IC

IC
ET

ET

ET

ET

ET
ET
ET
GN

GN

GN

GN

GN
GN
GN
MA

MA

MA

MA
MA

MA
MA

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 2000 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

32 1/2° 33° 33 1/2 34° 34 1/ 35° 35 1/2

° 2° °

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH
H

H
H

H
RT

RT

RT
RT

RT

RT

RT
NO

NO

NO

NO
NO

NO
NO
IC

IC

C
IC

IC

C
C
TI

TI
TI
ET

ET
ET

ET

NE

NE
NE
GN

GN
GN

GN

AG

AG
AG
MA

MA
MA

MA

M
M

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

A–36–2
Federal Geographic Data Committee U.S. Geological Survey Open-File Report 99–430
Public Review Draft - Digital Cartographic Standard for Geologic Map Symbolization PostScript Implementation (filename: of99-430_36-03.eps)

36—MEAN DECLINATION ARROWS (continued)

36.2—Magnetic north, west of true north

1° 11/2° 2° 2 1/2° 3° 31/2° 4°

MAGNETIC NORTH

MAGNETI C NORTH

MAGNE TIC NORTH

MAGN ETIC NORT H

MAG NETI C NORT H

MAG NET IC NOR

MAG NET IC NOR

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TH

TH
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

41/2° 5° 51/2° 6° 61/2° 7° 71/2°

MA GN ETI C
MA GN ETI C NO

MA GN ET IC

MA GN ET IC

MA GN ET

MA GN ET

MA GN ET
TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
IC NO RT

IC NO RT

IC NO RT
NO RTH

NO RT H

NO RT H
RTH

H
H
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

8° 81/2° 9° 91/2° 10° 101/2° 11°

M AG NE
M AG NE
MA GN ET

M AG N

MAGN
M AG N

MAGN
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH

TRUE NORTH
ET IC

E T IC
ET IC

E TI C
TI C NO
TI C NO
IC NO RT

NORT
N O R TH

N O R TH
N O R TH
RT H
RT H

H
H

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

111/2° 121/2° 13 /2° 14° 14 /2°

1 1
12° 13°
MAG
MAGN

MAG

MAG

MAG
MAG

MAG
TRUE NORTH

TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
N E T IC

N E T IC

NET

NET
NET
N E T IC
E T IC

IC N

IC N
IC N
NORT
NORT

NOR
NOR

OR
OR

ORT

TH
TH
TH
TH
H
H

H
APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

15° 151/2° 16° 161/2° 17° 17 /2°

1
18°
MAG

MAG

MAG

MAG
MAG

MAG

MAG
TRUE NORTH
TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH

TRUE NORTH
TRUE NORTH
NET

NET

NET

NET
NET

NET

NET
IC N

IC N

IC N

IC
IC N

IC

IC
NOR

NOR

NOR
ORT

OR

ORT
OR
TH

TH

TH
TH
TH
H

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

18 /2° 19° 19 /2° 20° 20 /2° 21° 21 /2°

1 1 1 1
MA
MA

MA

MA

TRUE NORTH
MA
TRUE NORTH
TRUE NORTH

MA

TRUE NORTH

TRUE NORTH
TRUE NORTH
TRUE NORTH

MA
GN
GN

GN

GN
GN

GN

GN
E T IC

E T IC

E T IC
E T IC

E T IC

E T IC

ET
IC
NO
NO

NO
NO

NO

NO

NO
RT
RTH
RTH
RTH

RTH

RT

RT
H

APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN APPROXIMATE MEAN
DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999 DECLINATION, 1999

22° 22 /2°
1
TRUE NORTH

TRUE NORTH
MA

MA
GN

GN
ET

ET
IC

IC
NO

NO
RT

RT
H

APPROXIMATE MEAN APPROXIMATE MEAN

DECLINATION, 1999 DECLINATION, 1999

A–36–3