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d.path
Langue: en
Version: 370761 (fedora - 01/12/10)
Section: 1 (Commandes utilisateur)
NAME
d.path - Find shortest path for selected starting and ending nodeKEYWORDS
display, networkingSYNOPSIS
d.pathd.path help
d.path [-gb] map=name [type=string[,string,...]] [coor=x1,y1,x2,y2] [alayer=integer] [nlayer=integer] [afcol=string] [abcol=string] [ncol=string] [color=string] [hcolor=string] [bgcolor=string] [--verbose] [--quiet]
Flags:
- -g
Use geodesic calculation for longitude-latitude locations- -b
Render bold lines- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- map=name
Name of input vector map- type=string[,string,...]
Type
Arc type
Options: line,boundary
Default: line,boundary- coor=x1,y1,x2,y2
Starting and ending coordinates- alayer=integer
Layer number
Arc layer
Default: 1- nlayer=integer
Layer number
Node layer
Default: 2- afcol=string
Arc forward/both direction(s) cost column- abcol=string
Arc backward direction cost column- ncol=string
Node cost column- color=string
Original line color
Default: black- hcolor=string
Highlight color
Default: red- bgcolor=string
Background color
Default: white
DESCRIPTION
d.path enables shortest path vector networking - based on DGLib (Directed Graph Library) vector network library (see screenshot). Costs may be either line lengths, or attributes saved in a database table. Supported are cost assignments for both arcs and nodes, and also different in both directions of a vector line. For areas cost will be calculated along boundary lines.NOTE
The user needs to display a vector map before using d.path. The 'from' and 'to' points are entered by mouse into the map displayed in the GRASS monitor, or if the coor option is used they can be specified non-interactively. The actions bound to the mouse buttons are described in the terminal window when running the command.To calculate shortest path non-interactively and save the path to a new vector map, use the v.net.path module.
EXAMPLE
# Spearfish
d.vect roads
d.path -b roads coor="601653.5,4922869.2","593330.8,4924096.6"
SEE ALSO
v.net.path, DGLibAUTHOR
Radim Blazek, ITC-Irst, Trento, ItalyLast changed: $Date: 2007-05-03 12:31:16 +0200 (Thu, 03 May 2007) $
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