Provided by: grass-doc_6.4.3-3_all 
NAME
d.vect - Displays user-specified vector map in the active graphics frame.
KEYWORDS
display, vector
SYNOPSIS
d.vect
d.vect help
d.vect [-vacixz] map=name display=string[,string,...] [type=string[,string,...]]
[layer=integer] [cats=range] [where=sql_query] [color=string] [fcolor=string]
[rgb_column=name] [zcolor=style] [width=integer] [wcolumn=name] [wscale=float]
[icon=string] [size=float] [size_column=name] [rot_column=name] [llayer=integer]
[attrcol=name] [lcolor=string] [bgcolor=string] [bcolor=string] [lsize=integer]
[font=string] [xref=string] [yref=string] [minreg=float] [maxreg=float]
[render=string] [--verbose] [--quiet]
Flags:
-v
Run verbosely
-a
Get colors from map table column (of form RRR:GGG:BBB)
-c
Random colors according to category number (or layer number if 'layer=-1' is given)
-i
Use values from 'cats' option as feature id
-x
Don't add to list of vectors and commands in monitor (it won't be drawn if the monitor
is refreshed)
-z
Colorize polygons according to z height
--verbose
Verbose module output
--quiet
Quiet module output
Parameters:
map=name
Name of input vector map
display=string[,string,...]
Display
Options: shape,cat,topo,dir,attr,zcoor
Default: shape
shape: Display geometry of features
cat: Display category numbers of features
topo: Display topology information (nodes, edges)
dir: Display direction of linear features
attr: Display selected attribute based on 'attrcol'
zcoor: Display z-coordinate of features (only for 3D vector maps)
type=string[,string,...]
Feature type
Options: point,line,boundary,centroid,area,face
Default: point,line,boundary,centroid,area,face
layer=integer
Layer number (if -1, all layers are displayed)
A single vector map can be connected to multiple database tables. This number
determines which table to use.
Default: 1
cats=range
Category values
Example: 1,3,7-9,13
where=sql_query
WHERE conditions of SQL statement without 'where' keyword
Example: income = 10000
color=string
Feature color
Either a standard GRASS color, R:G:B triplet, or "none"
Default: black
fcolor=string
Area fill color
Either a standard GRASS color, R:G:B triplet, or "none"
Default: 200:200:200
rgb_column=name
Name of color definition column (for use with -a flag)
Default: GRASSRGB
zcolor=style
Type of color table (for use with -z flag)
Default: terrain
width=integer
Line width
Default: 0
wcolumn=name
Name of column for line widths (these values will be scaled by wscale)
wscale=float
Scale factor for wcolumn
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/compass,extra/dim_arrow,extra/dive_flag,extra/fancy_compass,extra/fiducial,extra/fish,extra/half-
box,extra/half-
circle,extra/n_arrow1,extra/n_arrow1b,extra/n_arrow2,extra/n_arrow3,extra/n_arrow4,extra/n_arrow5,extra/n_arrow6,extra/n_arrow7a,extra/n_arrow7b,extra/n_arrow8a,extra/n_arrow8b,extra/n_arrow9,extra/offbox_ne,extra/offbox_nw,extra/offbox_se,extra/offbox_sw,extra/pentagon,extra/ping,extra/ring,extra/simple_zia,extra/target,geology/half-
arrow_left,geology/half-
arrow_right,geology/strike_box,geology/strike_circle,geology/strike_half-
bowtie,geology/strike_line,geology/strike_triangle
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
rot_column=name
Name of numeric column containing symbol rotation angle
Measured in degrees CCW from east
llayer=integer
Layer number
Layer number for labels (default: the given layer number)
Default: 1
attrcol=name
Name of column to be displayed
lcolor=string
Label color
Either a standard color name or R:G:B triplet
Default: red
bgcolor=string
Label background color
Either a standard GRASS color, R:G:B triplet, or "none"
Default: none
bcolor=string
Label border color
Either a standard GRASS color, R:G:B triplet, or "none"
Default: none
lsize=integer
Label size (pixels)
Default: 8
font=string
Font name
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
render=string
Rendering method for filled polygons
Options: g,r,d,c,l
Default: c
g: use the libgis render functions (features: clipping)
r: use the raster graphics library functions (features: polylines)
d: use the display library basic functions (features: polylines)
c: use the display library clipping functions (features: clipping)
l: use the display library culling functions (features: culling, polylines)
DESCRIPTION
d.vect displays GRASS vector data 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 fills in holes in polygons (islands). If you only want to show active
areas limit the features with, e.g.,
d.vect map=vector_map cats=1-999999
In order to display attributes in the map, display=attr must be specified in addition to
the column name (attrcol parameter).
Colors may be specified in an attribute table column named 'GRASSRGB' (which is a
varchar(11) column containing RRR:GGG:BBB values), see the flag -a.
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.addcol:
v.db.addcol 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 lcolor=green
# display randomly colorized soils map with attributes
d.vect -c map=soils display=attr attrcol=label
# display randomly colorized selected vectors from soils map
d.vect -c map=soils where="label='VBF'" display=shape,attr attrcol=label
3D points, 3D lines and 3D polygons colorized according to z height:
g.region rast=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 -z map=random3d zcolor=gyr
# 3D contour lines
r.contour input=elevation.10m output=contour20m step=20
d.vect -z map=contour20m zcolor=gyr
# generate 3D triangles
v.delaunay input=random3d output=random3d_del
# display 3D polygons colorized according to z height
d.vect -z map=random3d_del type=area zcolor=gyr
SEE ALSO
d.erase, d.what.vect, d.rast, d.font.freetype, v.colors, v.db.addcol, v.db.update
GRASS SQL interface
AUTHORS
CERL
Radim Blazek, ITC-Irst, Trento, Italy
other GRASS developers
Last changed: $Date: 2011-11-08 01:42:51 -0800 (Tue, 08 Nov 2011) $
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