stplanr (version 0.2.7)

route_local: Plan a route with local data

Description

This function returns the shortest path between locations in, or near to, segements on a SpatialLinesNetwork.

Usage

route_local(sln, from, to, l = NULL)

Arguments

sln

The SpatialLinesNetwork to use.

from

Text string or coordinates (a numeric vector of length = 2 representing latitude and longitude) representing a point on Earth.

to

Text string or coordinates (a numeric vector of length = 2 representing latitude and longitude) representing a point on Earth. This represents the destination of the trip.

l

Only needed if from and to are empty, in which case this should be a spatial object representing desire lines

Examples

# NOT RUN {
bb = sf::st_bbox(routes_fast)
set.seed(5)
from = c(runif(1, bb$xmin, bb$xmax), runif(1, bb$ymin, bb$ymax))
to = c(runif(1, bb$xmin, bb$xmax), runif(1, bb$ymin, bb$ymax))
sln = SpatialLinesNetwork(routes_fast)
r <- route_local(sln, from, to)
plot(r)
 
# }
# NOT RUN {
# todo: next code chunk is not currently working:
r2 = route_local(sln = sln, cents_sf[5, ], cents_sf[6, ])
plot(r2)
r_many <- line2route(flowlines_sf[2:9, ], route_local, sln = sln)
plot(cents)
plot(sln@sl, add = TRUE)
plot(r_many, add = TRUE)
# }