Questions regarding the stplanr package in R

Question

I would like your help with the route_local function of the stplanr package (https://cran.r-project.org/web/packages/stplanr/stplanr.pdf), which is on page 89.

You ma

Answer 1

Try this. To adapt the example to your case you have to convert the coordinate system of the roads to the points shapefile (or the other way around):

library(geosphere)
library(sf)
library(stplanr)

roads <- st_read("Example/Roads/Roads.shp")
points <- st_read("Example/Points/Points.shp")

# Convert roads to coordinate system of points
roads_trf <- st_transform(roads, st_crs(points))
# Convert to points to SpatialPointsDataframe
points_sp <-  as(points, "Spatial")

from <- c(-49.95058, -24.77502) # Feature 1
to <- c(-49.91084, -24.75200) # Feature 9
p <- SpatialLinesNetwork(roads_trf, uselonglat = FALSE, tolerance = 0)
r <- route_local(p, from, to)
plot(p)
plot(r$geometry, add = TRUE, col = "red", lwd = 5)
plot(points_sp[c(3, 4), ], add = TRUE)
r2 <- route_local(sln = p, points[3, ], points[4, ])
plot(r2$geometry, add = TRUE, col = "blue", lwd = 3)