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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 inhab >= 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, gdd, grass, greens, grey, grey.eq, grey.log, grey1.0, grey255, gyr, haxby, kelvin, ndvi, ndwi, oranges, 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: aspect oriented grey colors
aspectcolr aspectcolr: aspect oriented rainbow colors
bcyr bcyr: blue through cyan through yellow to red
bgyr bgyr: blue through green through yellow to red
blues blues: white to blue
byg byg: blue through yellow to green
byr byr: blue through yellow to red
celsius celsius: blue to red for degree Celsius temperature
corine corine: EU Corine land cover colors
curvature curvature: for terrain curvatures (from v.surf.rst and r.slope.aspect)
differences differences: differences oriented colors
elevation elevation: maps relative ranges of raster values to elevation color ramp
etopo2 etopo2: colors for ETOPO2 worldwide bathymetry/topography
evi evi: enhanced vegetative index colors
fahrenheit fahrenheit: blue to red for Fahrenheit temperature
gdd gdd: accumulated growing degree days
grass grass: GRASS GIS green (perceptually uniform)
greens greens: white to green
grey grey: grey scale
grey.eq grey.eq: histogram-equalized grey scale
grey.log grey.log: histogram logarithmic transformed grey scale
grey1.0 grey1.0: grey scale for raster values between 0.0-1.0
grey255 grey255: grey scale for raster values between 0-255
gyr gyr: green through yellow to red
haxby haxby: relative colors for bathymetry or topography
kelvin kelvin: blue to red for temperature in Kelvin scale
ndvi ndvi: Normalized Difference Vegetation Index colors
ndwi ndwi: Normalized Difference Water Index colors
oranges oranges: white to orange
population population: color table covering human population classification breaks
population_dens population_dens: color table covering human population density classification breaks
precipitation precipitation: precipitation color table (0..2000mm)
precipitation_daily precipitation_daily: precipitation color table (0..1000mm)
precipitation_monthly precipitation_monthly: precipitation color table (0..1000mm)
rainbow rainbow: rainbow color table
ramp ramp: color ramp
random random: random color table
reds reds: white to red
roygbiv roygbiv: no description
rstcurv rstcurv: terrain curvature (from r.resamp.rst)
ryb ryb: red through yellow to blue
ryg ryg: red through yellow to green
sepia sepia: yellowish-brown through to white
slope slope: r.slope.aspect-type slope colors for raster values 0-90
soilmoisture soilmoisture: soilmoisture color table (0.0-1.0)
srtm srtm: color palette for Shuttle Radar Topography Mission elevation
srtm_plus srtm_plus: color palette for Shuttle Radar Topography Mission elevation (with seafloor colors)
terrain terrain: global elevation color table covering -11000 to +8850m
viridis viridis: perceptually uniform sequential color table viridis
water water: water depth
wave wave: color wave
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/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/marker, basic/octagon, 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/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/marker, basic/octagon, 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/arrow1, basic/arrow2, basic/arrow3, basic/box, basic/circle, basic/cross1, basic/cross2, basic/cross3, basic/diamond, basic/marker, basic/octagon, 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

Table of contents

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.

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:

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

Last changed: $Date: 2014-12-19 13:17:36 -0800 (Fri, 19 Dec 2014) $

SOURCE CODE

Available at: d.vect source code (history)


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