v.lrs.segment(1grass) | GRASS GIS User's Manual | v.lrs.segment(1grass) |
v.lrs.segment - Creates points/segments from input lines, linear reference system and positions read from stdin or a file.
vector, linear reference system, network
v.lrs.segment
v.lrs.segment --help
v.lrs.segment input=name output=name
[llayer=string] [rsdriver=string]
[rsdatabase=string] rstable=string
[file=name] [--overwrite] [--help]
[--verbose] [--quiet] [--ui]
v.lrs.segment creates points/segments from input lines, linear reference 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>]
For more information and examples see the help page for v.lrs.segment’s sister module, v.segment.
This example is written for the Spearfish dataset (it continues the example 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
Figure out how to merge result into existing LRS map and table.
LRS tutorial,
Introducing the Linear Reference System in GRASS,
v.lrs.create, v.lrs.where, v.lrs.label, v.segment
Radim Blazek
Available at: v.lrs.segment source code (history)
Main index | Vector index | Topics index | Keywords index | Graphical index | Full index
© 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
GRASS 7.8.5 |