ps.map(1)

NAME
ps.map - Produces hardcopy PostScript map output.

KEYWORDS
postscript, printing

SYNOPSIS
ps.map
ps.map --help
ps.map [-rpeb] input=name output=name [copies=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

  Flags:

-r
    Rotate plot 90 degrees

-p
    List paper formats (name width height left right top bottom(margin))

-e
    Create EPS (Encapsulated PostScript) instead of PostScript file

-b
    Describe map-box’s position on the page and exit (inches from top-left of paper)

--overwrite
    Allow output files to overwrite existing files

--help
    Print usage summary

--verbose
    Verbose module output

--quiet
    Quiet module output

--ui
    Force launching GUI dialog

  Parameters:

input=name [required]
    File containing mapping instructions
    Use ’-’ to enter instructions from keyboard)

output=name [required]
    Name for PostScript output file

copies=integer
    Number of copies to print
    Options: 1-20

DESCRIPTION
ps.map is a cartographic mapping program for producing high quality hardcopy maps in PostScript format. Output can include a raster map, any number of vector overlays, text labels, decorations, and other spatial data.

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 order of commands is generally unimportant but may affect how some layers are drawn. For example to plot vpoints above vareas list the vpoints entry first. Raster maps are always drawn first, and only a single raster map (or 3 if part of a RGB group) may be used.

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
The mapping instructions allow the user to specify various spatial data to be plotted. These instructions are normally prepared in a regular text file using a system editor. Some instructions are single line instructions while others are multiple line. Multiple line instructions consist of the main instruction followed by a subsection of one or more additional instructions and are terminated with an end instruction.

  Instruction keywords:
[ border | colortable | comments | copies | eps | geogrid | greyrast | grid | group | header | labels | line | mapinfo | maploc | maskcolor | outline | paper | point | psfile | raster | read | rectangle | region | rgb | scale | scalebar | setcolor | text | vareas | vlines | vpoints | vlegend | end ]

  Common instructions
Instructions that may be included in the subsection under several different main instructions are:

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
Controls the border which is drawn around the map area.

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

The color may be either a standard GRASS color, a R:G:B triplet, or "none". The width is specified in points, unless followed by an "i" in which case it is measured in inches. The default is a black border box of width 1 point.

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
Prints the color table legend for the raster map layer anywhere on the page.

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

For a categorical (CELL) map the color table will create a legend displaying the colors for each of a raster map’s category values along with its associated category label. For a floating point (FCELL or DCELL) map a continuous gradient legend will be created.

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
Adding the nodata N instruction will prevent the "no data" box from being drawn (category based legends only). If you have manually added a "no data" label to the cats/ file it will be shown regardless.

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
The legend’s range can be adjusted for floating point rasters, but if set beyond the extent of the map’s range be sure that you have set up color rules with r.colors which cover this range. If the map has been given a data-units label with r.support then this label will be displayed. For floating point legends width is width of color band only. height is used only for floating point legend. A horizontal gradient legend can be achieved by setting the legend width greater than its height. Adding the tickbar Y instruction will change the tick mark style so that ticks are drawn across the color table instead of protruding out to the right (floating point legends only). Adding the discrete Y instruction will command the program to treat the map as a categorical map. In this way the legend can be created with discrete range bands instead of a continuous gradient. You must use the r.category or r.support module to set up the range labels first.

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
Prints comments anywhere on the page.

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

The default location is immediately below the last item item printed, starting at the left margin. The default text color is black.

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

Presumably, the file veg.comments contain comments pertaining to the raster map layer vegetation, such as "This map was created by classifying a LANDSAT TM image".

copies
Specifies the number of copies to be printed.

USAGE:    copies n

Each page will be printed n times.

This instruction is identical to the copies command line parameter.

eps
Places EPS (Encapsulated PostScript) pictures on the output map.

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

The EPS picture location is entered in the main instruction line by giving either the map coordinates or by using percentages of the geographic region. The EPS picture will be centered at the given position. The user must specify full EPS file path epsfile. The user may also specify the scale of the icon (default is 1.0), the rotate i.e. rotation in degrees (default is 0) and whether the point is to be masked by the current mask. (See manual entry for r.mask for more information on the mask.)

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

Of course, multiple EPS pictures may be drawn with multiple eps instructions.

geogrid
Overlays a geographic grid onto the output map.

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

The spacing and spacing unit of the geographic grid is given on the main instruction line. The spacing unit is given as one of d for degrees, m for minutes, and s for seconds. The subsection instructions allow the user to specify the color of the geographic grid lines, whether coordinate numbers should appear on the geographic grid lines, the width of the lines (accepts decimal points [floating points] as well as integers), and if they should appear every grid line (1), every other grid line (2), etc., and what color the numbers should be. The defaults are black grid lines, unnumbered.

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
Selects a raster map layer for output in shades of grey.

USAGE:    greyrast mapname

For each ps.map run, only one raster map layer can be requested (using either the greyrast or the raster instruction).

grid
Overlays a coordinate grid onto the output map.

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

The spacing of the grid is given (in the geographic coordinate system units) on the main instruction line. The subsection instructions allow the user to specify the color of the grid lines, whether coordinate numbers should appear on the grid lines, and if they should appear every grid line (1), every other grid line (2), etc., and what color the numbers should be. The cross argument draws grid intersection crosses instead of grid lines, with cross size given in geographic coordinate system units. The defaults are black grid lines, unnumbered.

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
Selects an RGB imagery group for output.

USAGE:    group groupname

This is similar to raster, except that it uses an imagery group instead of a raster map layer. The group must contain three raster map layers, comprising the red, green and blue bands of the image.

header
Prints the map header above the map.

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

If the file sub-instruction is absent the header will consist of the map’s title and the project’s description. The text will be centered on the page above the map. The default text color is black.

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 - project name

    •   %L - project’s text description

    •   %m - mapset name

    •   %u - user name

    •   %x - mask info

    •   %- - advance to this character column number (see example below)
Example header file:

%_
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
Selects a labels file for output (see manual entry for v.label ).

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
Draws lines on the output map.

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

The beginning and ending points of the line are entered on the main instruction. These points can be defined either by map coordinates or by using percentages of the geographic region. The user may also specify line color, width in points (1/72"; accepts decimal values as well as integers), and if the line is to be masked by the current mask. (See manual entry for r.mask for more information on the mask.) The line width (if given) is measured in points; an i directly following the number indicates that the width is given in inches instead.

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

Of course, multiple lines may be drawn with multiple line instructions.

mapinfo
Prints the portion of the map legend containing the scale, grid and region information, on or below the map.

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

The default location is immediately below the map, starting at the left edge of the map. The default text color is black. The default background box color is white.

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
Positions the map on the page.

USAGE:    maploc  x y [width height]

The upper left corner of the map will be positioned x inches from the left edge of the page and y inches from the top of the page. If width and height (in inches) are present, the map will be rescaled, if necessary, to fit.

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
Color to be used for mask.

USAGE:    maskcolor  color

outline
Outlines the areas of a raster map layer with a specified color.

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

Distinct areas of the raster map will be separated from each other visually by drawing a border (or outline) in the specified color (default: black). For width the program accepts decimal points [floating points] as well as integers. Note: it is important the user enter the instruction end even if a color is not chosen. (It is hoped that in the future the outline of a different raster map layer other than the one currently being painted may be placed on the map.)

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
Specifies paper size and margins.

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

paper may select predefined paper name (a4,a3,a2,a1,a0,us-legal,us-letter,us-tabloid). Default paper size is a4. The measures are defined in inches. left, right, bottom and top are paper margins. If the plot is rotated with the -r command line flag, measures are applied to the rotated page.

EXAMPLE:
    paper a3
    end

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

point
Places additional points or icons on the output map.

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

The point location is entered in the main instruction line by giving either the map coordinates or by using percentages of the geographic region. The user may also specify the point color, the size of symbol in points, the rotation angle (in degrees CCW), and whether the point is to be masked by the current mask. (See manual entry for r.mask for more information on the mask.) The symbol line width (if given) is measured in points; an i directly following the number indicates that the width is given in inches instead. If a width is not given it will be set proportional to the symbol size.

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

Of course, multiple points may be drawn with multiple point instructions.

psfile
Copies a file containing PostScript commands into the output 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 psfile instruction. (Note to /bin/csh users: ~ won’t work with this instruction).

USAGE:    psfile filename

This example copies the file "logo.ps" into the output file.

EXAMPLE:
    psfile logo.ps

raster
Selects a raster map layer for output.

USAGE:    raster mapname

For each ps.map run, only one raster map layer (or set of layers or imagery group; see below) can be requested. If no raster map layer is requested, a completely white map will be produced. It can be useful to select no raster map layer in order to provide a white background for vector maps.

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
Provides ps.map with a previously prepared input stream.

USAGE:    read previously prepared UNIX file

Mapping instructions can be placed into a file and read into ps.map.

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

The user may have created this file because this vector map layer is particularly useful for many ps.map outputs. By using the read option, the user need not enter all the input for the vector instruction, but simply read the previously prepared file with the correct instructions.

rectangle
Draws rectangle on the output map.

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

The two corners of the rectangle are entered on the main instruction. These points can be defined either by map coordinates or by using percentages of the geographic region. The user may also specify line color, fill color fcolor, width in points (accepts decimal points [floating points] as well as integers), and if the rectangle is to be masked by the current mask. (See manual entry for r.mask for more information on the mask.) The border line width (if given) is measured in points; an i directly following the number indicates that the width is given in inches instead.
Multiple rectangles may be drawn by using multiple rectangle instructions.

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
Places the outline of a smaller geographic region on the output.

USAGE:    region regionfile
    color color
    width #
    end

Geographic region settings are created and saved using the g.region module. The ps.map region option can be used to show an outline of a smaller region which was printed on a separate run of ps.map on other user-created maps.

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
Selects three raster map layers for output as an RGB color image.

USAGE:    rgb red green blue

This is similar to raster, except that it uses three raster map layers instead of a single layer. The three layers are composed to form a color image, similar to d.rgb.

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
Selects a scale for the output map.

USAGE:    scale scale

The scale can be selected either as:

    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
Draws a scalebar on the map.

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

Draw one of two types of scale bar. Fancy (f) draws alternating black and white scale boxes. Simple (s) draws a plain line scale. The default type is fancy. The subsection instructions allow the user to set where the scalebar is placed, the length of the scalebar (in geographic coordinate system units, or those given by units), the height of the scalebar in inches, and the number of segments (or tics for simple). The number of annotations numbers every n-th segment. The background command can turn off the background box for the text.

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
Overrides the color assigned to one or more categories of the raster map layer.

USAGE:    setcolor cat(s) color

This example would set the color for categories 2,5 and 8 of the raster map layer watersheds to white and category 10 to green. (NOTE: no spaces are inserted between the category values.)

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

Of course, setcolor can be requested more than once to override the default color for additional categories. More than one category can be changed for each request by listing all the category values separated by commas (but with no spaces). Also ranges can be included, for example "1,2,6-10,12". Colors for "null" and the "default" (i.e. out-of-range) color may also be reassigned.

text
Places text on the map.

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 specifies where the text will be placed by providing map coordinates or percentages of the geographic region. The text follows these coordinates on the same instruction line. More than one line of text can be specified by notating the end of a line with \n (e.g. USA\nCERL).

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
Selects a vector map layer for output and plots areas.

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

The user can specify:

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
Selects a vector map layer for output and plots lines.

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

The user can specify:

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
Selects vector point data to be placed on the output map

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

The user may specify the the color of the sites (see section on NAMED COLORS); either the GRASS symbol or the eps Encapsulated Postscript file to be used to represent the presence of a site (if ’$’ is used in the EPS file path it will be replaced by category number); and rotate (in degrees) for counter-clockwise rotation.
The size of the icon (number of times larger than the size it is in the icon file) is typically given by the size option. Alternatively the size of the symbol or EPS graphic can be taken from an attribute column by using the sizecolumn command. The value given by sizecolumn may be scaled by using the scale factor setting (default scaling is 1.0). In a similar manner symbol color can be read from rgbcolumn and the rotation angle read from rotatecolumn.

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

vlegend
Prints the portion of the map legend containing the vector information, on or below the map.

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

The default location is immediately below the legend containing the scale, grid and region information, starting at the left edge of the map. If the where instruction is present and y is less than or equal to zero, the vector legend will be positioned immediately below the map, starting x inches from the left edge of the page.

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
Terminates input and begin painting the map.

USAGE:    end

EXAMPLES
The following are examples of ps.map script files.

  Simple example
The file has been named simple_map.txt:

# 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

Generate map as Postsript file:

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
The following is content of a file named elevation_map.txt:

# 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

This script file can be entered at the command line:

# 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
g.gui.psmap, g.region, v.label, wxGUI

AUTHORS
Paul Carlson, USDA, SCS, NHQ-CGIS
Modifications: Radim Blazek, Glynn Clements, Bob Covill, Hamish Bowman

SOURCE CODE

Available at: ps.map source code (history)

Latest change: Friday Apr 17 01:04:26 2026 in commit: 32a143358df26b2e518b03c7e0d79541e8d1e5b1

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© 2003-2026 GRASS Development Team, GRASS 8.5.1dev Reference Manual