Provided by: grass-doc_8.4.1-1_all 
NAME
d.vect - Displays user-specified vector map in the active graphics frame.
KEYWORDS
display, graphics, vector, level1
SYNOPSIS
d.vect
d.vect --help
d.vect [-cirs] map=name [layer=string] display=string[,string,...] [type=string[,string,...]]
[cats=range] [where=sql_query] [color=name] [fill_color=name] [rgb_column=name] [zcolor=style]
[width=integer] [width_column=name] [width_scale=float] [icon=string] [size=float]
[size_column=name] [rotation_column=name] [icon_area=string] [icon_line=string]
[legend_label=string] [label_layer=string] [attribute_column=name] [label_color=name]
[label_bgcolor=name] [label_bcolor=name] [label_size=integer] [font=string] [encoding=string]
[xref=string] [yref=string] [minreg=float] [maxreg=float] [--help] [--verbose] [--quiet]
[--ui]
Flags:
-c
Random colors according to category number (or layer number if ’layer=-1’ is given)
-i
Use values from ’cats’ option as feature id
-r
Use square root of the value of size_column
This makes circle areas proportionate to the size_column values instead of circle radius
-s
Do not show this layer in vector legend
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
map=name [required]
Name of vector map
Or data source for direct OGR access
layer=string
Layer number or name (’-1’ for all layers)
A single vector map can be connected to multiple database tables. This number determines which table
to use. When used with direct OGR access this is the layer name.
Default: 1
display=string[,string,...] [required]
Display
Options: shape, cat, topo, vert, dir, zcoor
Default: shape
shape: Display geometry of features
cat: Display category numbers of features
topo: Display topology information (nodes, edges)
vert: Display vertices of features
dir: Display direction of linear features
zcoor: Display z-coordinate of features (only for 3D vector maps)
type=string[,string,...]
Input feature type
Options: point, line, boundary, centroid, area, face
Default: point,line,area,face
cats=range
Category values
Example: 1,3,7-9,13
where=sql_query
WHERE conditions of SQL statement without ’where’ keyword
Example: income < 1000 and population >= 10000
color=name
Feature color
Either a standard color name, R:G:B triplet, or "none"
Default: 0:29:57
fill_color=name
Area fill color
Either a standard color name, R:G:B triplet, or "none"
Default: 0:103:204
rgb_column=name
Colorize features according to color definition column
Color definition in R:G:B form
zcolor=style
Colorize point or area features according to z-coordinate
Options: aspect, aspectcolr, bcyr, bgyr, blues, byg, byr, celsius, corine, curvature, differences,
elevation, etopo2, evi, fahrenheit, forest_cover, gdd, grass, greens, grey, grey.eq, grey.log,
grey1.0, grey255, gyr, haxby, inferno, kelvin, magma, ndvi, ndwi, nlcd, oranges, plasma, population,
population_dens, precipitation, precipitation_daily, precipitation_monthly, rainbow, ramp, random,
reds, roygbiv, rstcurv, ryb, ryg, sepia, slope, soilmoisture, srtm, srtm_plus, terrain, viridis,
water, wave
aspect: aspect oriented grey colors [range: map values]
aspectcolr: aspect oriented rainbow colors [range: 0 to 360]
bcyr: blue through cyan through yellow to red [range: map values]
bgyr: blue through green through yellow to red [range: map values]
blues: white to blue [range: map values]
byg: blue through yellow to green [range: map values]
byr: blue through yellow to red [range: map values]
celsius: blue to red for degree Celsius temperature [range: -80 to 80]
corine: EU Corine land cover colors [range: 111 to 995]
curvature: for terrain curvatures (from v.surf.rst and r.slope.aspect) [range: map values]
differences: differences oriented colors [range: map values]
elevation: maps relative ranges of raster values to elevation color ramp [range: map values]
etopo2: colors for ETOPO2 worldwide bathymetry/topography [range: -11000 to 8850]
evi: enhanced vegetative index colors [range: -1 to 1]
fahrenheit: blue to red for Fahrenheit temperature [range: -112 to 176]
forest_cover: percentage of forest cover [range: 0 to 100]
gdd: accumulated growing degree days [range: 0 to 6000]
grass: GRASS GIS green (perceptually uniform) [range: map values]
greens: white to green [range: map values]
grey: grey scale [range: map values]
grey.eq: histogram-equalized grey scale [range: map values]
grey.log: histogram logarithmic transformed grey scale [range: map values]
grey1.0: grey scale for raster values between 0.0-1.0 [range: 0 to 1]
grey255: grey scale for raster values between 0-255 [range: 0 to 255]
gyr: green through yellow to red [range: map values]
haxby: relative colors for bathymetry or topography [range: map values]
inferno: perceptually uniform sequential color table inferno [range: map values]
kelvin: blue to red for temperature in Kelvin scale [range: 193.15 to 353.15]
magma: perceptually uniform sequential color table magma [range: map values]
ndvi: Normalized Difference Vegetation Index colors [range: -1 to 1]
ndwi: Normalized Difference Water Index colors [range: -200 to 200]
nlcd: US National Land Cover Dataset colors [range: 0 to 95]
oranges: white to orange [range: map values]
plasma: perceptually uniform sequential color table plasma [range: map values]
population: color table covering human population classification breaks [range: 0 to 2e+09]
population_dens: color table covering human population density classification breaks [range: 0 to
1e+09]
precipitation: precipitation color table (0..2000mm) [range: 0 to 7000]
precipitation_daily: precipitation color table (0..1000mm) [range: 0 to 10000]
precipitation_monthly: precipitation color table (0..1000mm) [range: 0 to 1000]
rainbow: rainbow color table [range: map values]
ramp: color ramp [range: map values]
random: random color table [range: map values]
reds: white to red [range: map values]
roygbiv: [range: map values]
rstcurv: terrain curvature (from r.resamp.rst) [range: map values]
ryb: red through yellow to blue [range: map values]
ryg: red through yellow to green [range: map values]
sepia: yellowish-brown through to white [range: map values]
slope: r.slope.aspect-type slope colors for raster values 0-90 [range: 0 to 90]
soilmoisture: soilmoisture color table (0.0-1.0) [range: 0 to 1]
srtm: color palette for Shuttle Radar Topography Mission elevation [range: -11000 to 8850]
srtm_plus: color palette for Shuttle Radar Topography Mission elevation (with seafloor colors)
[range: -11000 to 8850]
terrain: global elevation color table covering -11000 to +8850m [range: -11000 to 8850]
viridis: perceptually uniform sequential color table viridis [range: map values]
water: water depth [range: map values]
wave: color wave [range: map values]
width=integer
Line width
Default: 0
width_column=name
Name of numeric column containing line width
These values will be scaled by width_scale
width_scale=float
Scale factor for width_column
Default: 1
icon=string
Point and centroid symbol
Options: basic/arrow, basic/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle,
basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/hexagon, basic/marker, basic/octagon,
basic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, basic/triangle, basic/x,
demo/muchomurka, demo/smrk, extra/4pt_star, extra/adcp, extra/airport, extra/alpha_flag,
extra/bridge, extra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, extra/half-box,
extra/half-circle, extra/offbox_ne, extra/offbox_nw, extra/offbox_se, extra/offbox_sw,
extra/pentagon, extra/ping, extra/ring, extra/simple_zia, extra/target, geology/circle_cross,
geology/half-arrow_left, geology/half-arrow_right, geology/strike_box, geology/strike_circle,
geology/strike_cleavage, geology/strike_half-bowtie, geology/strike_line, geology/strike_parallel,
geology/strike_triangle, legend/area, legend/area_curved, legend/line, legend/line_crooked,
n_arrows/basic_compass, n_arrows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b,
n_arrows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_arrow5, n_arrows/n_arrow6,
n_arrows/n_arrow7a, n_arrows/n_arrow7b, n_arrows/n_arrow8a, n_arrows/n_arrow8b, n_arrows/n_arrow9
Default: basic/x
size=float
Symbol size
When used with the size_column option this becomes the scale factor
Default: 5
size_column=name
Name of numeric column containing symbol size
rotation_column=name
Name of numeric column containing symbol rotation angle
Measured in degrees CCW from east
icon_area=string
Area/boundary symbol for legend
Options: basic/arrow, basic/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle,
basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/hexagon, basic/marker, basic/octagon,
basic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, basic/triangle, basic/x,
demo/muchomurka, demo/smrk, extra/4pt_star, extra/adcp, extra/airport, extra/alpha_flag,
extra/bridge, extra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, extra/half-box,
extra/half-circle, extra/offbox_ne, extra/offbox_nw, extra/offbox_se, extra/offbox_sw,
extra/pentagon, extra/ping, extra/ring, extra/simple_zia, extra/target, geology/circle_cross,
geology/half-arrow_left, geology/half-arrow_right, geology/strike_box, geology/strike_circle,
geology/strike_cleavage, geology/strike_half-bowtie, geology/strike_line, geology/strike_parallel,
geology/strike_triangle, legend/area, legend/area_curved, legend/line, legend/line_crooked,
n_arrows/basic_compass, n_arrows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b,
n_arrows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_arrow5, n_arrows/n_arrow6,
n_arrows/n_arrow7a, n_arrows/n_arrow7b, n_arrows/n_arrow8a, n_arrows/n_arrow8b, n_arrows/n_arrow9
Default: legend/area
icon_line=string
Line symbol for legend
Options: basic/arrow, basic/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle,
basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/hexagon, basic/marker, basic/octagon,
basic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, basic/triangle, basic/x,
demo/muchomurka, demo/smrk, extra/4pt_star, extra/adcp, extra/airport, extra/alpha_flag,
extra/bridge, extra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, extra/half-box,
extra/half-circle, extra/offbox_ne, extra/offbox_nw, extra/offbox_se, extra/offbox_sw,
extra/pentagon, extra/ping, extra/ring, extra/simple_zia, extra/target, geology/circle_cross,
geology/half-arrow_left, geology/half-arrow_right, geology/strike_box, geology/strike_circle,
geology/strike_cleavage, geology/strike_half-bowtie, geology/strike_line, geology/strike_parallel,
geology/strike_triangle, legend/area, legend/area_curved, legend/line, legend/line_crooked,
n_arrows/basic_compass, n_arrows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b,
n_arrows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_arrow5, n_arrows/n_arrow6,
n_arrows/n_arrow7a, n_arrows/n_arrow7b, n_arrows/n_arrow8a, n_arrows/n_arrow8b, n_arrows/n_arrow9
Default: legend/line
legend_label=string
Label to display after symbol in vector legend
label_layer=string
Layer number for labels (default: the given layer number)
Vector features can have category values in different layers. This number determines which layer to
use. When used with direct OGR access this is the layer name.
Default: 1
attribute_column=name
Name of column to be displayed as a label
label_color=name
Label color
Either a standard color name or R:G:B triplet
Default: red
label_bgcolor=name
Label background color
Either a standard color name, R:G:B triplet, or "none"
Default: none
label_bcolor=name
Label border color
Either a standard color name, R:G:B triplet, or "none"
Default: none
label_size=integer
Label size (pixels)
Default: 8
font=string
Font name
encoding=string
Text encoding
xref=string
Label horizontal justification
Options: left, center, right
Default: left
yref=string
Label vertical justification
Options: top, center, bottom
Default: center
minreg=float
Minimum region size (average from height and width) when map is displayed
maxreg=float
Maximum region size (average from height and width) when map is displayed
DESCRIPTION
d.vect displays vector maps in the active frame on the graphics monitor.
NOTES
d.vect can simply be used typing d.vect map=vector_map. There are a large variety of optional parameters
which allow the user to specify vector type, colors, data fields, SQL queries, label size and
justification, etc.
When d.vect is used with where parameter on MS Windows Command Prompt, it is important to use ˆ carret
symbol for escaping special characters < > ( ) & | , ; ".
d.vect map=vector_map where="cat ˆ> 10 AND cat ˆ< 20"
By default d.vect areas are filled with fill_color and outlined with color. Area outlines can be
suppressed with
d.vect map=vector_map color=none
and areas can be made transparent with
d.vect map=vector_map fill_color=none
In order to display attributes in the map, attribute_column must be specified.
Feature colors may be specified by v.colors in a form of color table or in an attribute table column
containing RRR:GGG:BBB values.
A table for a vector map might look like this:
db.select sql="select * from testisola"
cat|label|GRASSRGB
0|no data|255:255:255
90|FRASSILONGO|23:245:67
104|LEVICO|23:145:67
139|PERGINE VALSUGANA|223:45:237
168|SANT’ORSOLA|223:45:67
190|TENNA|123:45:67
To add the GRASSRGB color column, use v.db.addcolumn:
v.db.addcolumn map=testisola columns="GRASSRGB varchar(11)"
To add/change a color, use v.db.update:
v.db.update map=testisola column=GRASSRGB value="123:45:237" where="cat=139"
A much simpler method of color coding is by using the -c flag which displays vector elements of like
category number with a random color.
This module can use FreeType/TrueType fonts if they have already been selected with d.font.
Parameter width is set by default to ’0’. XDRIVER specifies the precise behaviour for non-zero line
width, but drivers have some freedom as to how zero-width lines are handled, so they can use the
hardware’s "thin line" drawing primitive, if it has one. A width of zero can potentially result in
significantly faster operation. On drivers where there is no such thing as a "thin" line, the driver will
use a sensible default (which might not be the same as ’1’).
EXAMPLES
Spearfish examples:
# display roads with category numbers:
d.vect map=roads display=shape,cat label_color=green
# display randomly colorized soils map with attributes
d.vect -c map=soils attribute_column=label
# display randomly colorized selected vectors from soils map
d.vect -c map=soils where="label=’VBF’" display=shape attribute_column=label
3D points, 3D lines and 3D polygons colorized according to z height (for 3D lines and polygons a z height
is computed by a midpoint of line/area bounding box):
g.region raster=elevation.10m
r.random input=elevation.10m n=5000 vector=random3d -d
d.mon start=x0
# display as black points
d.vect map=random3d
# display 3D points colorized according to z height
d.vect map=random3d zcolor=gyr
# 3D contour lines
r.contour input=elevation.10m output=contour20m step=20
d.vect map=contour20m zcolor=gyr
# generate 3D triangles
v.delaunay input=random3d output=random3d_del
# display 3D polygons colorized according to z height
d.vect map=random3d_del type=area zcolor=gyr
SEE ALSO
v.colors, d.erase, d.rast, v.colors, v.db.addcolumn, v.db.update
GRASS SQL interface
AUTHORS
CERL
Radim Blazek, ITC-Irst, Trento, Italy
Support for color tables by Martin Landa, Czech Technical University in Prague (8/2011)
and many other GRASS developers
SOURCE CODE
Available at: d.vect source code (history)
Accessed: Friday Apr 04 01:18:52 2025
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GRASS 8.4.1 d.vect(1grass)