man d.vect () - Displays GRASS vector data in the active frame on the graphics monitor.
NAME
d.vect - Displays GRASS vector data in the active frame on the graphics monitor.
SYNOPSIS
d.vect
d.vect help
d.vect [-vacix] map=string [type=string[,string,...]] [display=string[,string,...]] [attrcol=string] [icon=string] [size=integer] [layer=integer] [cats=string] [where=string] [color=string] [fcolor=string] [llayer=integer] [lcolor=string] [bgcolor=string] [bcolor=string] [lsize=integer] [font=string] [xref=string] [yref=string] [minreg=float] [maxreg=float]
Flags:
- "-v
- Run verbosely
- "-a
- Get area fill colors from map table column 'GRASSRGB' (RRR:GGG:BBB)
- "-c
- Fill areas with random colors according to category number
- "-i
- Use values from 'cat' option as line id
- "-x
- Don't add to list of vectors and commands in monitor
Parameters:
- "map=string
- Name of input vector
- "type=string[,string,...]
- Type Options: point,line,boundary,centroid,area,face Default: point,line,boundary,centroid,area,face
- "display=string[,string,...]
- Display Options: shape,cat,topo,dir,attr,zcoor Default: shape
- "attrcol=string
- Name of column to be displayed
- "icon=string
- Point and centroid symbol Default: basic/x
- "size=integer
- Icon size Default: 8
- "layer=integer
- Layer number Default: 1
- "cats=string
- Category values. Example: 1,3,7-9,13
- "where=string
- WHERE conditions of SQL statement without 'where' keyword. (example: income = 10000)
- "color=string
- Line color Default: black
- "fcolor=string
- Area fill color Default: gray
- "llayer=integer
- Layer for labels Default: 1
- "lcolor=string
- Label color Default: red
- "bgcolor=string
- Label background color Default: none
- "bcolor=string
- Label border color Default: none
- "lsize=integer
- Label size (pixels) Default: 8
- "font=string
- Font name Options: cyrilc,gothgbt,gothgrt,gothitt,greekc,greekcs,greekp,greeks,italicc,italiccs,italict,romanc,romancs,romand,romans,romant,scriptc,scripts Default: romans
- "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 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.
Vector area fill-colors may be specified in an attribute table column named 'GRASSRGB' (which is a varchar column containing RRR:GGG:BBB values). The -a flag is then used to fill areas based upon the color value associated with each category number.
A table for a vector area map might look like this:
echo "select * from testisola" | db.select
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, the SQL alter function is used:
echo "ALTER TABLE testisola ADD COLUMN GRASSRGB varchar(1)" | db.execute
To add/change a color, the SQL update function is used:
echo "update testisola set GRASSRGB='123:45:237' where cat=139" | db.execute
A much simpler method of color coding is by using the -c flag which fills areas of like category number with a random color.
This module can use FreeType/TrueType fonts if they have already been selected with d.font.freetype.
EXAMPLES
d.vect map=vectmap display=shape,cat lcolor=green
d.vect map=markveggy.vegtype where="VEGTYPE = 'IFA'"
d.vect -c map=soils display=shape,attr attrcol=label
SEE ALSO
d.erase,
d.what.vect,
d.rast,
d.font.freetype
GRASS SQL interface
GRASS 5.7 tutorial pages
AUTHOR
Radim Blazek, ITC-Irst, Trento, Italy
Last changed: $Date: 2005/02/13 06:29:21 $
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