NAME

KEYWORDS

SYNOPSIS

DESCRIPTION

A file of mapping instructions that describes the various spatial and textual information to be printed must be prepared prior to running ps.map.

NOTES

The hash character ('#') may be used at the beginning of a line to indicate that the line is a comment. Blank lines will also be ignored.

Be aware that some mapping instructions require the end command and some do not. Any instruction that allows subcommands will require it, any instruction that does not allow subcommands will not.

The resolution and extent of raster maps plotted with ps.map are controlled by the current region settings via the g.region module. The output filesize is largely a function of the region resolution, so special care should be taken if working with large raster datasets. For example if the desired output is US-Letter sized paper at 600dpi, with 1" margins and the raster filling the entire page, the usable area on the page will be 6.5" x 9", which at 600 dots/inch is equivalent to a region of 3900 columns x 5400 rows (see "g.region -p"). Any higher resolution settings will make the output file larger, but with a consumer printer you probably won't be able to resolve any better detail in the hardcopy.

The user can specify negative or greater than 100 percentage values for positioning several map decorations and embedded EPS-files, to move them outside the current map box region (for example to position a caption, barscale, or legend above or below the map box).

One point ("pixel") is 1/72 of an inch.

For users wanting to use special characters (such as accented characters) it is important to note that ps.map uses ISO-8859-1 encoding. This means that your instructions file will have to be encoded in this encoding. If you normally work in a different encoding environment (such as UTF-8), you have to transform your file to the ISO-8859-1 encoding, for example by using the iconv utility:

iconv -f UTF-8 -t ISO_8859-1 utf_file > iso_file

MAPPING INSTRUCTIONS

Instruction keywords:

Common instructions

where x y

The top left corner of the bounding box of the item to be plotted is located x inches from the left edge of the paper and y inches from the top edge of the paper. If x is less than or equal to zero, the default horizontal location is used. If y is less than or equal to zero, the default vertical location is used.

font font name

The name of the PostScript font. Fonts present in all PostScript implementations are: Times-Roman, Times-Italic, Times-Bold, Times-BoldItalic, Helvetica, Helvetica-Oblique, Helvetica-Bold, Helvetica-BoldOblique, Courier, Courier-Oblique, Courier-Bold, and Courier-BoldOblique.
The default is Helvetica.

fontsize font size

The size of the PostScript font (in 1/72nds of an inch). The default is 10 point.

color name

The following colors names are accepted by ps.map: aqua, black, blue, brown, cyan, gray, grey, green, indigo, magenta, orange, purple, red, violet, white, yellow .

For vectors and some plotting commands you can also specify 'none' or 'R:G:B' (e.g '255:0:0').

yes|no

For options that take a yes or no answer, you can simply use the letters "y" or "n", or type out the full words "Yes" or "No" if you prefer. It is not case-sensitive. Typically the option with have a default answer and you only need to specify one if you wish to override it.

Command usage

border

USAGE:  border [y|n]
	color color
	width #
	end

The border can be turned off completely with the "border n" instruction. In this case the end command should not be given as the main command will be treated as a single line instruction.

This example would create a grey border 0.1" wide.

EXAMPLE:
	border
	color grey
	width 0.1i
	end

colortable

USAGE:	colortable [y|n]
	where x y
	raster raster map
	range minimum maximum
	width table width
	height table height (FP legend only)
	cols table columns
	font font name
	fontsize font size
	color text color
	nodata [Y|n]
	tickbar [y|N]
	discrete [y|n]
	end

If raster is omitted, the colortable defaults to the previously registered raster layer.

The default location for the colortable is immediately below any other map legend information, starting at the left margin. The default text color is black.

Omitting the colortable instruction would result in no color table. If the colortable is turned off with a "colortable N" instruction the end command should not be given as the main command will be treated as a single line instruction.

See also the vlegend command for creating vector map legends.

Categorical (CELL) Maps

Note: Be careful about asking for color tables for integer raster map layers which have many categories, such as elevation. This could result in the printing of an extremely long color table! In this situation it is useful to use the discrete N instruction to force a continuous color gradient legend.

Be aware that the color table only includes categories which have a label. You can use the r.category module to add labels.

Floating point (FCELL and DCELL) Maps

This example would print a color table immediately below any other map legend information, starting at the left margin, with 4 columns:

EXAMPLE:
	colortable y
        cols 4
        width 4
        end

comments

USAGE:	comments commentfile
	where x y
	font font name
	fontsize font size
	color text color
	end

If you wish to use parentheses spanning multiple lines you will need to quote them with a backslash to prevent the PostScript interpreter from getting confused. e.g. '\(' and '\)'

This example prints in blue whatever is in the file veg.comments starting at 1.5 inches from the left edge of the page and 7.25 inches from the top of the page, using a 15/72 inch Helvetica Bold font.

EXAMPLE:
	raster vegetation
	comments veg.comments
	where 1.5 7.25
	font Helvetica Bold
	fontsize 15
	color blue
	end

copies

USAGE:	copies n

This instruction is identical to the copies command line parameter.

eps

USAGE:	eps east north
	eps x% y%
	epsfile EPS file
	scale #
	rotate #
	masked [y|n]
	end

This example would place a EPS file ./epsf/logo.eps at the point (E456000 N7890000). This picture would be rotated 20 degrees clockwise, 3 times bigger than in original file and would not be masked by the current mask.

EXAMPLE:
	eps 456000 7890000
	epsfile ./epsf/logo.eps
	scale 3
	rotate 20
	masked n
	end

geogrid

USAGE:	geogrid spacing unit
	color color
	numbers # [color]
	font font name
	fontsize font size
	width #
	end

NOTE: The geogrid draws grid numbers on the east and south borders of the map.

This example would overlay a blue geographic grid with a spacing of 30 minutes onto the output map. Alternate grid lines would be numbered with yellow numbers.

EXAMPLE:
	geogrid 30 m
	color blue
	numbers 2 yellow
	end

greyrast

USAGE:	greyrast mapname

grid

USAGE:	grid spacing
	color color
	numbers # [color]
	cross cross size
	font font name
	fontsize font size
	width #
	end

This example would overlay a green grid with a spacing of 10000 meters (for a metered database, like UTM) onto the output map. Alternate grid lines would be numbered with red numbers.

EXAMPLE:
	grid 10000
	color green
	numbers 2 red
	end

group

USAGE:	group groupname

header

USAGE:	header
	file header file
	font font name
	fontsize font size
	color text color
	end

If the file sub-instruction is given the header will consist of the text in the text file specified, with some special formatting keys:

• %% - a literal %
• %n - ? newline ?
• %_ - horizontal bar
• %c - "<raster name> in mapset <mapset name>"
• %d - today's date
• %l - location name
• %L - Location's text description
• %m - mapset name
• %u - user name
• %x - mask info
• %- - advance to this character column number (see example below)

%_
LOCATION: %-27l  DATE: %d
MAPSET:   %-27m  USER: %u

RASTER MAP: %c
MASK:     %x
%_
Produced by: US Army CERL, Champaign Illinois
Software:    GRASS
%_

This example prints (in red) whatever is in the file soils.hdr above the map, using a 20/72 inch Courier font.

EXAMPLE:
	header
	file soils.hdr
	font Courier
	fontsize 20
	color red
	end

labels

USAGE:	labels  labelfile
	font font name
	end

NOTE: ps.map can read new option 'ROTATE:' from labels file, which specifies counter clockwise rotation in degrees.

This example would paint labels from the labels file called town.names. Presumably, these labels would indicate the names of towns on the map.

EXAMPLE:
	labels town.names
	end

line

USAGE:	line east north east north
	line x% y% x% y%
	color color
	width #
	masked [y|n]
	end

This example would draw a yellow line from the point x=10% y=80% to the point x=30% y=70%. This line would be 2 points wide (2/72") and would appear even if there is a mask.

EXAMPLE:
	line 10% 80% 30% 70%
	color yellow
	width 2
	masked n
	end

mapinfo

USAGE:	mapinfo
	where x y
	font font name
	fontsize font size
	color text color
	background box color|none
	border color|none
	end

border will draw a border around the legend using the specified color. (see NAMED COLORS)

This example prints (in brown) the scale, grid and region information immediately below the map and starting 1.5 inches from the left edge of the page, using a 12/72 inch Courier font.

EXAMPLE:
	mapinfo
	where 1.5 0
	font Courier
	fontsize 12
	color brown
	end

maploc

USAGE:	maploc  x y [width height]

This example positions the upper left corner of the map 2.0 inches from the left edge and 3.5 inches from the top edge of the map.

EXAMPLE:
	maploc 2.0 3.5

maskcolor

USAGE:	maskcolor  color

outline

USAGE:	outline
	color  color
	width  width of line in points
	end

This example would outline the category areas of the soils raster map layer in grey.

EXAMPLE:
	raster soils
	outline
	color grey
	width 2
	end

paper

USAGE:	paper paper name
	height #
	width #
	left #
	right #
	bottom #
	top #
	end

EXAMPLE:
	paper a3
	end

EXAMPLE:
	paper
	width 10
	height 10
	left 2
	right 2
	bottom 2
	top 2
	end

point

USAGE:	point east north
	point x% y%
	color color
	fcolor color
	symbol symbol group/name
	size #
	width #
	rotate #
	masked [y|n]
	end

This example would place a purple diamond (from icon file diamond) at the point (E456000 N7890000). This diamond would be the the size of a 15 points and would not be masked by the current mask.

EXAMPLE:
	point 456000 7890000
	fcolor purple
	color black
	symbol basic/diamond
	size 15
	masked n
	end

psfile

Note: ps.map will not search for this file. The user must be in the correct directory or specify the full path on the psfile instruction. (Note to /bin/csh users: ~ won't work with this instruction).

USAGE:	psfile filename

EXAMPLE:
	psfile logo.ps

raster

USAGE:	raster mapname

Note that an imagery group selected with the group option, or a set of three raster layers selected with the rgb option, count as a raster map layer for the purposes of the preceding paragraph.

The PostScript file's internal title will be set to the raster map's title, which in turn may be set with the r.support module.

This example would paint a map of the raster map layer soils.

EXAMPLE:
	raster soils

read

USAGE:	read previously prepared UNIX file

Note: ps.map will not search for this file. The user must be in the correct directory or specify the full path on the read instruction. (Note to /bin/csh users: ~ won't work with this instruction).

This example reads the UNIX file pmap.roads into ps.map. This file may contain all the ps.map instructions for placing the vector map layer roads onto the output map.

EXAMPLE:
	read pmap.roads

rectangle

USAGE:	rectangle east north east north
	rectangle x% y% x% y%
	color color
	fcolor fill color
	width #
	masked [y|n]
	end

This example would draw a yellow rectangle filled by green from the point x=10% y=80% to the point x=30% y=70%. The border line would be 1/16" wide and would appear even if there is a mask.

EXAMPLE:
	rectangle 10% 80% 30% 70%
	color yellow
	fcolor green
	width 0.0625i
	masked n
	end

region

USAGE:	region regionfile
	color color
	width #
	end

The user can specify the color and the width in point units (accepts decimal points [floating points] as well as integers) of the outline. The default is a black border of one point width (1/72").

This example would place a white outline, 2 points wide, of the geographic region called fire.zones onto the output map. This geographic region would have been created and saved using g.region.

EXAMPLE:
	region fire.zones
	color white
	width 2
	end

rgb

USAGE:	rgb red green blue

For each layer, only one of the components of the layer's color table is used: the red component for the red layer, and so on. This will give the desired result if all of the layers have a grey-scale color table, or if each layer's color table uses the hue appropriate to the layer.

scale

USAGE:	scale scale

a relative ratio, e.g. 1:25000;

an absolute width of the printed map, e.g. 10 inches;

the number of printed paper panels, e.g. 3 panels .I (at the present time, only 1 panel is supported);

the number of miles per inch, e.g. 1 inch equals 4 miles.

This example would set the scale of the map to 1 unit = 25000 units.

EXAMPLE:
	scale 1:25000

scalebar

USAGE:	scalebar [f|s]
	where x y
	length overall distance in map units
	units [auto|meters|kilometers|feet|miles|nautmiles]
	height scale height in inches
	segment number of segments
	numbers #
	fontsize font size
	background [Y|n]
	end

The scalebar length is the only required argument. The defaults are a fancy scalebar with 4 segments, each segment labeled, and a height of 0.1 inches. The default location is 2 inches from the top of the page and halfway across.

NOTE: The scalebar is centered on the location given.

This example draws a simple scalebar 1000 meters (for a metered database, like UTM) long, with tics every 200 meters, labeled every second tic. The scalebar is drawn 5 inches from the top and 4 inches from the left and is 0.25 inches high.

EXAMPLE:
	scalebar s
	where 4 5
	length 1000
	height 0.25
	segment 5
	numbers 2
	end

setcolor

USAGE:	setcolor cat(s) color

EXAMPLE:
	raster watersheds
	setcolor 2,5,8 white
	setcolor 10 green

text

USAGE:	text  east north text
	text  x% y% text
	font fontname
	color color|none
	width #
	hcolor color|none
	hwidth #
	background color|none
	border color|none
	fontsize font size
	size #
	ref reference point
	rotate degrees CCW
	xoffset #
	yoffset #
	opaque [y|n]
	end

The user can then specify various text features:

font: the PostScript font. Common possibilities are listed at the start of this help page. The default is Helvetica.

color (see NAMED COLORS);

width of the lines used to draw the text to make thicker letters (accepts decimal points [floating points] as well as integers);

size and fontsize.  size gives the vertical height of the letters in meters on the ground (text size will grow or shrink depending on the scale at which the map is painted). Alternatively fontsize can set the font size directly. If neither size or fontsize is given, a default font size of 10 will be used;

the highlight color (hcolor) and the width of the highlight color (hwidth);

the text-enclosing-box background color; the text box border color;

ref. This reference point specifies the text handle - what part of the text should be placed on the location specified by the map coordinates. Reference points can refer to: [lower|upper|center] [left|right|center] of the text to be printed; The default is center center, i.e. the text is centered on the reference point.

rotate sets the text rotation angle, measured in degrees counter-clockwise.

yoffset, which provides finer placement of text by shifting the text a vertical distance in points (1/72") from the specified north. The vertical offset will shift the location to the south if positive, north if negative;

xoffset, which shifts the text a horizontal distance in points from the specified east The horizontal offset will shift the location east if positive, west if negative;

opaque, whether or not the text should be opaque to vectors. Entering no to the opaque option will allow the user to see any vectors which go through the text's background box. Otherwise, they will end at the box's edge.

The following example would place the text SPEARFISH LAND COVER at the coordinates E650000 N7365000. The text would be a total of 3 points wide (2 pixels of red text and 1 pixel black highlight), have a white background enclosed in a red box, and be 500 meters in size. The lower right corner of the text would be centered over the coordinates provided. All vectors on the map would stop at the border of this text.

EXAMPLE:
	text 650000 7365000 SPEARFISH LAND COVER
	font romand
	color red
	width 2
	hcolor black
	hwidth 1
	background white
	border red
	size 500
	ref lower left
	opaque y
	end

vareas

USAGE:	vareas vectormap
	layer # (layer number used with cats/where option)
	cats list of categories (e.g. 1,3,5-7)
	where SQL where statement
	masked [y|n]
	color color
	fcolor color
	rgbcolumn column
	width #
	label label to use in legend
	lpos position in legend
	pat pattern file
	pwidth #
	scale #
	end

color - color of the vector lines or area boundaries;

fcolor - the area fill color;

rgbcolumn - name of color definition column used for the area fill color;

width - width of the vectors lines or area boundaries in points (accepts decimal points [floating points] as well as integers);

masked - whether or not the raster map layer is to be masked by the current mask; (see manual entry r.mask for more information on the mask)

cats - which categories should be plotted (default is all);

where - select features using a SQL where statement. For example: vlastnik = 'Cimrman';

label - for description in vlegend. Default is: map(mapset);

lpos - position vector is plotted in legend. If lpos is 0 then this vector is omitted in legend. If more vectors used the same lpos then their symbols in legend are merged and label for first vector is used.

pat - full path to pattern file. The pattern file contains header and simple PostScript commands. It is similar to EPS but more limited, meaning that while each pattern file is a true EPS file, most EPS files are not useful as pattern files because they contain restricted commands. Color of patterns are set by fcolor (red, green, ..., none, R:G:B). Color of the boundaries remain set by the color instruction. Pattern may be scaled with the scale command. Several standard hatching patterns are provided in $GISBASE/etc/paint/patterns/. Demonstrative images can be found on the GRASS Wiki site. You can also create your own custom pattern files in a text editor. Example of pattern file:

%!PS-Adobe-2.0 EPSF-1.2
%%BoundingBox: 0 0 10 10
newpath
5 0 moveto
5 10 lineto
stroke

scale - pattern scale

pwidth - pattern line width, width is used by pattern until the width is overwritten in pattern file.

EXAMPLE:
	vareas forest
	color blue
	width 1
	masked y
	cats 2,5-7
	end

vlines

USAGE:	vlines vectormap
	type line and/or boundary
	layer # (layer number used with cats/where option)
	cats list of categories (e.g. 1,3,5-7)
	where SQL where statement like: vlastnik = 'Cimrman'
	masked [y|n]
	color color
	rgbcolumn column
	width #
	cwidth #
	hcolor color
	hwidth #
	offset #
	coffset #
	ref left|right
	style 00001111
	linecap style
	label label
	lpos #
	end

type - the default is lines only;

color - color of the vector lines or area boundaries;

rgbcolumn - name of color definition column used for the vector lines or area boundaries;

width - width of the vectors lines or area boundaries in points (accepts decimal points [floating points] as well as integers);

cwidth - width of the vectors lines. If cwidth is used then width of line is equal to cwidth * category value and width is used in legend;

hcolor - the highlight color for the vector lines;

hwidth - the width of the highlight color in points;

offset (experimental) - offset for the vectors lines in points (1/72") for plotting parallel lines in distance equal to offset (accepts positive or negative decimal points). Useful to print streets with several parallel lanes;

coffset (experimental) - offset for the vectors lines. If coffset is used then offset of line is equal to coffset * category value and offset is used in legend;

ref (experimental) - line justification.

masked - whether or not the raster map layer is to be masked by the current mask; (see manual entry r.mask for more information on the mask);

style - the line style allows the vectors to be dashed in different patterns. This is done by either typing "solid", "dashed", "dotted", or "dashdotted", or as a series of 0's and 1's in a desired sequence or pattern. The first block of repeated zeros or ones represents "draw", the second block represents "blank". An even number of blocks will repeat the pattern, an odd number of blocks will alternate the pattern. The default is "solid";

linecap - the linecap specifies the look of the ends of the line, or the end of the dashes in a dashed line. The parameters are: 'butt' for butt caps (default), 'round' for round caps and 'extended_butt' for extended butt caps. The shape of the round and the extended butt caps is related to the line thickness: for round butts the radius is half the linewidth, while for extended butt the line will extend for half the linewidth.

cats - which categories should be plotted (default is all);

label - for description in vlegend. Default is: map(mapset);

lpos - position vector is plotted in legend. If lpos is 0 then this vector is omitted in legend. If more vectors used the same lpos then their symbols in legend are merged and label for first vector is used.

EXAMPLE:
	vlines streams
	color blue
	width 2
	hcolor white
	hwidth 1
	masked y
	cats 2
	label Streams - category 2
	end

vpoints

USAGE:	vpoints vectormap
	type point and/or centroid
	layer # (layer number used with cats/where/sizecol options)
	cats list of categories (e.g. 1,3,5-7)
	where SQL where statement like: vlastnik = 'Cimrman'
	masked [y|n]
	color color
	fcolor color
	rgbcolumn column
	width #
	eps epsfile
	symbol symbol group/name
	size #
	sizecolumn attribute column used for symbol sizing
	scale scaling factor for sizecolumn values
	rotate #
	rotatecolumn column
	label legend label
	lpos position in legend
	end

EXAMPLE:
	vpoints windmills
	color blue
	symbol mills/windmill
	size 10
	end

vlegend

USAGE:	vlegend
	where x y
	font font name
	fontsize font size
	width width of color symbol
	cols number of columns to print
	span column separation
	border color|none
	end

width is the width in inches of the color symbol (for lines) in front of the legend text. The default is 1/24 * fontsize inches.

cols is the number of columns to split the legend into. The default is one column. The maximum number of columns is 10, or equal to the number of legend entries if there are less than 10 entries.

span is the column separation distance between the left edges of two columns in a multicolumn legend. It is given in inches. The default is automatic scaling based on the left margin and the right hand side of the map box.

border will draw a border around the legend using the specified color. (see NAMED COLORS)

Alternatively, the user can create a custom legend by using the rectangle, point, and text instructions.

See also the colortable command for creating raster map legends.

This example prints the vector legend immediately below the map and starting 4.5 inches from the left edge of the page, using a 12/72 inch Helvetica font.

EXAMPLE:
	vlegend
	where 4.5 0
	font Courier
	fontsize 12
	end

end

USAGE:	end

EXAMPLES

Simple example

# this ps.map example draws a map of Wake county, NC
raster elevation
vlines roadsmajor
  color 30:144:255
  width 2
  end
text 50% 105% Wake County Terrain and Roads
   size 550
   end
end

ps.map input=simple_map.txt output=simple_map.ps

Figure: Result of for the a simple Wake county terrain and roads example

More complicated example

# this ps.map example draws a map of Wake county, NC
raster elevation
colortable y
  where 1 6.0
  cols 4
  width 4
  font Helvetica
  end
setcolor 6,8,9 white
setcolor 10 green
vlines streams
  width 0.1
  color blue
  masked n
  label streams
  end
vlines roadsmajor
  width 1.5
  style 1111
  color grey
  masked n
  label major roads
  end
vlegend
  where 4.5 0
  font Courier
  fontsize 8
  end
text 30% 100% Wake County Terrain
  color black
  width 1
  background white
  size 550
  ref lower left
  end
text 92% -25% meters
  color black
  width 1
  background white
  size 550
  ref lower left
  end
scale 1:125000
scalebar f
  where 1.5 5.5
  length 5000
  height 0.05
  segment 5
  numbers 5
  end
geogrid 60 s
  color gray
  numbers 2 black
  end
paper a4
   end
end

# First set the region
g.region raster=elevation

# Generate map as Postsript file
ps.map input=elevation_map.txt output=elevation.ps

Figure: Result of for the more complicated Wake county, NC example

More examples can be found on the GRASS Wiki help site.

SEE ALSO

AUTHORS

SOURCE CODE

Available at: ps.map source code (history)

Latest change: Monday Feb 27 13:45:25 2023 in commit: a82501dc85294207e8e58437c3ec7f1056465ed4

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© 2003-2024 GRASS Development Team, GRASS GIS 8.3.3dev Reference Manual