d.vect(1grass) GRASS GIS User's Manual d.vect(1grass)
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_col-
umn=name] [icon_area=string] [icon_line=string] [legend_la-
bel=string] [label_layer=string] [attribute_column=name] [la-
bel_color=name] [label_bgcolor=name] [label_bcolor=name] [la-
bel_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 in-
stead 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: black
fill_color=name
Area fill color
Either a standard color name, R:G:B triplet, or "none"
Default: 200:200:200
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, or-
anges, plasma, population, population_dens, precipitation, precipi-
tation_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.as-
pect) [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 ele-
vation (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, ba-
sic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3,
basic/diamond, basic/hexagon, basic/marker, basic/octagon, ba-
sic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, ba-
sic/triangle, basic/x, demo/muchomurka, demo/smrk, extra/4pt_star,
extra/adcp, extra/airport, extra/alpha_flag, extra/bridge, ex-
tra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, ex-
tra/half-box, extra/half-circle, extra/offbox_ne, extra/offbox_nw,
extra/offbox_se, extra/offbox_sw, extra/pentagon, extra/ping, ex-
tra/ring, extra/simple_zia, extra/target, geology/circle_cross, ge-
ology/half-arrow_left, geology/half-arrow_right, geol-
ogy/strike_box, geology/strike_circle, geology/strike_cleavage, ge-
ology/strike_half-bowtie, geology/strike_line, geology/strike_par-
allel, geology/strike_triangle, legend/area, legend/area_curved,
legend/line, legend/line_crooked, n_arrows/basic_compass, n_ar-
rows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b, n_ar-
rows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_ar-
row5, 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, ba-
sic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3,
basic/diamond, basic/hexagon, basic/marker, basic/octagon, ba-
sic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, ba-
sic/triangle, basic/x, demo/muchomurka, demo/smrk, extra/4pt_star,
extra/adcp, extra/airport, extra/alpha_flag, extra/bridge, ex-
tra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, ex-
tra/half-box, extra/half-circle, extra/offbox_ne, extra/offbox_nw,
extra/offbox_se, extra/offbox_sw, extra/pentagon, extra/ping, ex-
tra/ring, extra/simple_zia, extra/target, geology/circle_cross, ge-
ology/half-arrow_left, geology/half-arrow_right, geol-
ogy/strike_box, geology/strike_circle, geology/strike_cleavage, ge-
ology/strike_half-bowtie, geology/strike_line, geology/strike_par-
allel, geology/strike_triangle, legend/area, legend/area_curved,
legend/line, legend/line_crooked, n_arrows/basic_compass, n_ar-
rows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b, n_ar-
rows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_ar-
row5, 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, ba-
sic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3,
basic/diamond, basic/hexagon, basic/marker, basic/octagon, ba-
sic/pin, basic/pin_dot, basic/point, basic/pushpin, basic/star, ba-
sic/triangle, basic/x, demo/muchomurka, demo/smrk, extra/4pt_star,
extra/adcp, extra/airport, extra/alpha_flag, extra/bridge, ex-
tra/dim_arrow, extra/dive_flag, extra/fiducial, extra/fish, ex-
tra/half-box, extra/half-circle, extra/offbox_ne, extra/offbox_nw,
extra/offbox_se, extra/offbox_sw, extra/pentagon, extra/ping, ex-
tra/ring, extra/simple_zia, extra/target, geology/circle_cross, ge-
ology/half-arrow_left, geology/half-arrow_right, geol-
ogy/strike_box, geology/strike_circle, geology/strike_cleavage, ge-
ology/strike_half-bowtie, geology/strike_line, geology/strike_par-
allel, geology/strike_triangle, legend/area, legend/area_curved,
legend/line, legend/line_crooked, n_arrows/basic_compass, n_ar-
rows/fancy_compass, n_arrows/n_arrow1a, n_arrows/n_arrow1b, n_ar-
rows/n_arrow2, n_arrows/n_arrow3, n_arrows/n_arrow4, n_arrows/n_ar-
row5, 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 ac-
cess 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 moni-
tor.
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 justifi-
cation, etc.
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: unknown
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GRASS 7.8.7 d.vect(1grass)
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