# 11. Chart of Octal Codes for Characters

The characters and their octal codes in the Standard and ISOLatin1 encoded fonts are shown in Figure Octal codes for Standard and ISO. Light red areas signify codes reserved for control characters. In order to use all the extended characters (shown in the light green boxes) you need to set PS_CHAR_ENCODING to Standard+ or ISOLatin1+ in your gmt.conf file [29].

Download PDF version: `GMT Standard+ and ISOLatin1+ octal codes`

Octal codes and corresponding symbols for StandardEncoding (left) and ISOLatin1Encoding (right) fonts.

Here is the source script for the figure above:

    rm -f gmt.conf	# We cannot have that set yet, will do later.
    cat << EOF > tt.txt
    3		1	2	3	4	5	6	7
    4	0	1	2	3	4	5	6	7
    5	0	1	2	3	4	5	6	7
    6	0	1	2	3	4	5	6	7
    7	0	1	2	3	4	5	6	7
    8	0	1	2	3	4	5	6	7
    9	0	1	2	3	4	5	6	7
    10	0	1	2	3	4	5	6	7
    11	0	1	2	3	4	5	6	7
    12	0	1	2	3	4	5	6	7
    13	0	1	2	3	4	5	6	7
    14	0	1	2	3	4	5	6	7
    15	0	1	2	3	4	5	6	7
    16	0	1	2	3	4	5	6	7
    17	0	1	2	3	4	5	6	7
    18	0	1	2	3	4	5	6	7
    19	0	1	2	3	4	5	6	7
    20		1	2	3	4	5	6	7
    21	0	1	2	3	4	5	6	7
    22	0	1	2	3	4	5	6	7
    23	0	1	2	3	4	5	6	7
    24	0	1	2	3	4	5	6	7
    25	0	1	2	3	4	5	6	7
    26	0	1	2	3	4	5	6	7
    27	0	1	2	3	4	5	6	7
    28	0	1	2	3	4	5	6	7
    29	0	1	2	3	4	5	6	7
    30	0	1	2	3	4	5	6	7
    31	0	1	2	3	4	5	6	7
    EOF

    cat << EOF > tt.awk
    BEGIN {
    	printf "0.5 2.5 10p,4 octal\n"
    	for (i = 0; i < 8; i++)
    	{
    		printf "%g 2.5 10p,4 %d\n", i + 1.5, i
    	}
    }
    {
    	printf "0.5 %g 10p,4 \\\\\\\%02ox\n", \$1+0.5, \$1
    	for (i = 2; i <= NF; i++)
    	{
    		printf "%g %g 10p,4 \\\\%02o%o\n", \$i+1.5, \$1+0.5, \$1, \$i
    	}
    }
    EOF

    $AWK -f tt.awk tt.txt > tt.d

    gmt begin
    	gmt set GMT_THEME cookbook
    	gmt set MAP_FRAME_PEN thick FONT_TITLE 14p

    	gmt figure stand+ png A,E600

    	gmt set PS_CHAR_ENCODING Standard+

    	gmt plot -R0/9/2/32 -Jx0.345i/-0.21i -BN+tStandard+ -Glightred -Y0.0 << EOF
    >
    1	4
    2	4
    2	3
    1	3
    >
    1	21
    2	21
    2	20
    1	20
    EOF
    	gmt plot -Glightgreen << EOF
    >
    2	4
    9	4
    9	3
    2	3
    >
    8	16
    9	16
    9	15
    8	15
    >
    1	20
    9	20
    9	16
    1	16
    >
    1	23
    2	23
    2	22
    1	22
    >
    6	23
    7	23
    7	22
    6	22
    >
    7	24
    8	24
    8	23
    7	23
    >
    1	25
    2	25
    2	24
    1	24
    >
    2	26
    3	26
    3	25
    2	25
    >
    5	26
    6	26
    6	25
    5	25
    >
    2	27
    9	27
    9	26
    2	26
    >
    1	28
    9	28
    9	27
    1	27
    >
    1	29
    2	29
    2	28
    1	28
    >
    3	29
    4	29
    4	28
    3	28
    >
    5	29
    9	29
    9	28
    5	28
    >
    1	30
    2	30
    2	29
    1	29
    >
    5	30
    9	30
    9	29
    5	29
    >
    1	31
    2	31
    2	30
    1	30
    >
    3	31
    6	31
    6	30
    3	30
    >
    7	31
    9	31
    9	30
    7	30
    >
    1	32
    2	32
    2	31
    1	31
    >
    5	32
    9	32
    9	31
    5	31
    EOF
    	gmt text tt.d -F+f
    	gmt plot -Bg1 -Wthick << EOF
    >
    0	3
    9	3
    >
    1	2
    1	32
    EOF

    	gmt figure iso+ png A,E600
    	gmt set PS_CHAR_ENCODING ISOLatin1+

    	gmt plot -R0/9/2/32 -Jx0.345i/-0.21i -BN+tISOLatin1+ -Glightred -Y0.0 << EOF
    >
    1	4
    2	4
    2	3
    1	3
    >
    1	21
    2	21
    2	20
    1	20
    EOF
    	gmt plot -Glightgreen << EOF
    >
    2	4
    9	4
    9	3
    2	3
    >
    8	16
    9	16
    9	15
    8	15
    >
    1	18
    9	18
    9	16
    1	16
    >
    2	20
    3	20
    3	19
    2	19
    >
    5	20
    6	20
    6	19
    5	19
    EOF
    	gmt text tt.d -F+f
    	gmt plot -Bg1 -Wthick << EOF
    >
    0	3
    9	3
    >
    1	2
    1	32
    EOF
    gmt end

    gmt set -Du PS_CHAR_ENCODING ISOLatin1+ GMT_GRAPHICS_FORMAT ps
    gmt begin GMT_App_F_stand+_iso+
    	gmt image stand+.png -Dx0/0+r600
    	gmt image iso+.png -Dx0/0+r600 -X3.2i
    gmt end show
    rm stand+.png iso+.png tt.awk tt.d tt.txt

The chart for the Symbol character set (GMT font number 12) and Pifont ZapfDingbats character set (font number 34) are presented in Figure Octal codes for Symbol and ZapfDingbats below. The octal code is obtained by appending the column value to the \?? value, e.g., \(\partial\) is \266 in the Symbol font. The euro currency symbol is \240 in the Symbol font and will print if your printer supports it (older printer’s firmware will not know about the euro).

Download PDF version: `GMT Symbol and ZapfDingbats octal codes`

Octal codes and corresponding symbols for Symbol (left) and ZapfDingbats (right) fonts.

Here is the source script for the figure above:

    gmt begin GMT_App_F_symbol_dingbats
    gmt set GMT_THEME cookbook
    gmt set MAP_FRAME_PEN thick FONT_TITLE 14p

    gmt set PS_CHAR_ENCODING ISOLatin1+

    cat << EOF > tt.txt
    4	0	1	2	3	4	5	6	7
    5	0	1	2	3	4	5	6	7
    6	0	1	2	3	4	5	6	7
    7	0	1	2	3	4	5	6	7
    8	0	1	2	3	4	5	6	7
    9	0	1	2	3	4	5	6	7
    10	0	1	2	3	4	5	6	7
    11	0	1	2	3	4	5	6	7
    12	0	1	2	3	4	5	6	7
    13	0	1	2	3	4	5	6	7
    14	0	1	2	3	4	5	6	7
    15	0	1	2	3	4	5	6
    EOF

    cat << EOF > tt.awk
    BEGIN {
    	printf "0.5 3.5 10p,4 octal\n"
    	for (i = 0; i < 8; i++)
    	{
    		printf "%g 3.5 10p,4 %d\n", i + 1.5, i
    	}
    }
    {
    	printf "0.5 %g 10p,4 \\\\\\\%02ox\n", \$1+0.5, \$1
    	for (i = 2; i <= NF; i++)
    	{
    		printf "%g %g 10p,12 \\\\%02o%o\n", \$i+1.5, \$1+0.5, \$1, \$i
    	}
    }
    EOF

    $AWK -f tt.awk tt.txt > tt.d
    gmt plot -R0/9/3/16 -Jx0.345i/-0.21i -BN+tSymbol -Glightgreen -Y2.58i << EOF
    >
    8	16
    9	16
    9	15
    8	15
    EOF
    gmt text tt.d -F+f
    gmt plot -Bg1 -Wthick << EOF
    >
    0	4
    9	4
    >
    1	3
    1	16
    EOF

    cat << EOF > tt.txt
    20	0	1	2	3	4	5	6	7
    21	0	1	2	3	4	5	6	7
    22	0	1	2	3	4	5	6	7
    23	0	1	2	3	4	5	6	7
    24	0	1	2	3	4	5	6	7
    25	0	1	2	3	4	5	6	7
    26	0	1	2	3	4	5	6	7
    27	0	1	2	3	4	5	6	7
    28	0	1	2	3	4	5	6	7
    29	0	1	2	3	4	5	6	7
    30	0	1	2	3	4	5	6	7
    31	0	1	2	3	4	5	6
    EOF

    cat << EOF > tt.awk
    {
    	printf "0.5 %g 10p,4 \\\\\\\%02ox\n", \$1+0.5, \$1
    	for (i = 2; i <= NF; i++)
    	{
    		printf "%g %g 10p,12 \\\\%02o%o\n", \$i+1.5, \$1+0.5, \$1, \$i
    	}
    }
    EOF

    $AWK -f tt.awk tt.txt > tt.d
    gmt plot -R0/9/20/32 -Glightgreen -Y-2.58i << EOF
    >
    8	32
    9	32
    9	31
    8	31
    EOF
    gmt text tt.d -F+f
    gmt plot -Bg1 -Wthick << EOF
    >
    1	20
    1	32
    EOF

    cat << EOF > tt.txt
    4	0	1	2	3	4	5	6	7
    5	0	1	2	3	4	5	6	7
    6	0	1	2	3	4	5	6	7
    7	0	1	2	3	4	5	6	7
    8	0	1	2	3	4	5	6	7
    9	0	1	2	3	4	5	6	7
    10	0	1	2	3	4	5	6	7
    11	0	1	2	3	4	5	6	7
    12	0	1	2	3	4	5	6	7
    13	0	1	2	3	4	5	6	7
    14	0	1	2	3	4	5	6	7
    15	0	1	2	3	4	5	6
    EOF

    cat << EOF > tt.awk
    BEGIN {
    	printf "0.5 3.5 10p,4 octal\n"
    	for (i = 0; i < 8; i++)
    	{
    		printf "%g 3.5 10p,4 %d\n", i + 1.5, i
    	}
    }
    {
    	printf "0.5 %g 10p,4 \\\\\\\%02ox\n", \$1+0.5, \$1
    	for (i = 2; i <= NF; i++)
    	{
    		printf "%g %g 10p,34 \\\\%02o%o\n", \$i+1.5, \$1+0.5, \$1, \$i
    	}
    }
    EOF

    $AWK -f tt.awk tt.txt > tt.d

    gmt set PS_CHAR_ENCODING ISOLatin1+

    gmt plot -R0/9/3/16 -Jx0.345i/-0.21i -BN+tZapfDingbats -Glightgreen -X3.2i -Y2.58i << EOF
    >
    8	16
    9	16
    9	15
    8	15
    EOF
    gmt text tt.d -F+f
    gmt plot -Bg1 -Wthick << EOF
    >
    0	4
    9	4
    >
    1	3
    1	16
    EOF

    cat << EOF > tt.txt
    20		1	2	3	4	5	6	7
    21	0	1	2	3	4	5	6	7
    22	0	1	2	3	4	5	6	7
    23	0	1	2	3	4	5	6	7
    24	0	1	2	3	4	5	6	7
    25	0	1	2	3	4	5	6	7
    26	0	1	2	3	4	5	6	7
    27	0	1	2	3	4	5	6	7
    28	0	1	2	3	4	5	6	7
    29	0	1	2	3	4	5	6	7
    30	0	1	2	3	4	5	6	7
    31	0	1	2	3	4	5	6
    EOF

    cat << EOF > tt.awk
    {
    	printf "0.5 %g 10p,4 \\\\\\\%02ox\n", \$1+0.5, \$1
    	for (i = 2; i <= NF; i++)
    	{
    		printf "%g %g 10p,34 \\\\%02o%o\n", \$i+1.5, \$1+0.5, \$1, \$i
    	}
    }
    EOF

    $AWK -f tt.awk tt.txt > tt.d
    gmt plot -R0/9/20/32 -Glightgreen -Y-2.58i << EOF
    >
    1	21
    2	21
    2	20
    1	20
    >
    8	32
    9	32
    9	31
    8	31
    EOF
    gmt text tt.d -F+f
    gmt plot -Bg1 -Wthick << EOF
    >
    1	20
    1	32
    EOF
    gmt end show

## 11.1. Footnote

[ 29 ]

If you chose SI units during the installation then the default encoding is ISOLatin1+, otherwise it is Standard+.