Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
v.lrs.segment(1)	    GRASS GIS User's Manual	      v.lrs.segment(1)

NAME
       v.lrs.segment   - Creates points/segments from input lines, linear ref-
       erence system and positions read	from stdin or a	file.

KEYWORDS
       vector, linear reference	system,	network

SYNOPSIS
       v.lrs.segment
       v.lrs.segment --help
       v.lrs.segment   input=name    output=name     [llayer=string]	  [rs-
       driver=string]	  [rsdatabase=string]	 rstable=string	   [file=name]
       [--overwrite]  [--help]	[--verbose]  [--quiet]	[--ui]

   Flags:
       --overwrite
	   Allow output	files to overwrite existing files

       --help
	   Print usage summary

       --verbose
	   Verbose module output

       --quiet
	   Quiet module	output

       --ui
	   Force launching GUI dialog

   Parameters:
       input=nameA [required]
	   Name	of input vector	map
	   Input vector	map containing lines

       output=nameA [required]
	   Output vector map where segments will be written

       llayer=string
	   Layer number	or name
	   Line	layer
	   Default: 1

       rsdriver=string
	   Driver name for reference system table
	   Options: dbf, ogr, pg, sqlite
	   Default: sqlite

       rsdatabase=string
	   Database name for reference system table
	   Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db

       rstable=stringA [required]
	   Name	of the reference system	table

       file=name
	   Name	of file	containing segment rules.  If  not  given,  read  from
	   stdin.

DESCRIPTION
       v.lrs.segment  creates  points/segments from input lines, linear	refer-
       ence system and positions read from standard in or a file.

       The format is as	follows:
       P <point_id> <line_id> <milepost>+<offset> [<side offset>]
       L <segment_id> <line_id>	<milepost>+<offset> <milepost>+<offset>	[<side offset>]

NOTES
       For more	information and	examples see the help page for v.lrs.segment's
       sister module, v.segment.

EXAMPLE
       This example is written for the Spearfish dataset (it continues the ex-
       ample from v.lrs.create).

       In this example,	the 'route_lrs'	shall be extended for a	 new  position
       (point) along the LRS after bus stop 4:
       # new point on LRS
       echo "P 7 22 4+180" | v.lrs.segment route_lrs out=route_lrs_new rstable=route_lrs
       g.region	vector=route_lrs n=n+100 s=s-100 -p
       d.erase
       # existing LRS
       d.vect route_lrs
       d.vect busstops disp=attr attr=cat size=10 bg=white lcol=blue yref=bottom
       d.vect busstops icon=basic/circle fcol=blue
       db.select table=route_lrs
       # show modified map
       d.vect route_lrs_new col=red

TODO
       Figure out how to merge result into existing LRS	map and	table.

SEE ALSO
	LRS tutorial,
       Introducing the Linear Reference	System in GRASS,
       v.lrs.create, v.lrs.where, v.lrs.label, v.segment

AUTHOR
       Radim Blazek

SOURCE CODE
       Available at: v.lrs.segment source code (history)

       Main  index  | Vector index | Topics index | Keywords index | Graphical
       index | Full index

       A(C) 2003-2020 GRASS Development	Team, GRASS GIS	7.8.3 Reference	Manual

GRASS 7.8.3						      v.lrs.segment(1)

NAME | KEYWORDS | SYNOPSIS | DESCRIPTION | NOTES | EXAMPLE | TODO | SEE ALSO | AUTHOR | SOURCE CODE

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=v.lrs.segment&sektion=1&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help