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d.vect: Displays user-specified vector map in the active graphics frame.


d.vect - Displays user-specified vector map in the active graphics frame.


display, vector


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 Line 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: demo/muchomurka,demo/smrk,basic/arrow1,basic/arrow2,basic/box,basic/circle,basic/cross1,basic/cross2,basic/diamond,basic/marker,basic/octagon,basic/point,basic/pushpin,basic/star,basic/triangle,basic/x,extra/4pt_star,extra/adcp,extra/airport,extra/alpha_flag,extra/bridge,extra/compass,extra/dive_flag,extra/fancy_compass,extra/fiducial,extra/fish,extra/half- box,extra/half- circle,extra/n_arrow1,extra/n_arrow2,extra/offbox_ne,extra/offbox_nw,extra/offbox_se,extra/offbox_sw,extra/pentagon,extra/ping,extra/ring,extra/target,geology/strike_box,geology/strike_circle,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)
d.vect displays GRASS vector data in the active frame on the graphics monitor.
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').


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


d.erase, d.what.vect, d.rast, d.font.freetype, v.colors, v.db.addcol, v.db.update GRASS SQL interface


CERL Radim Blazek, ITC-Irst, Trento, Italy other GRASS developers Last changed: $Date: 2010-02-24 12:35:55 +0100 (Wed, 24 Feb 2010) $ Full index (C) 2003-2010 GRASS Development Team D.VECT(1)

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