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The goal of roads is to simulate road development under resource development scenarios.


You can install the released version of roads from CRAN with:


And the development version from GitHub with:

# install.packages("devtools")


To simulate the development of roads three inputs are needed: the current road network (roads), the locations that should be connected to the road network (landings) and the cost of building roads across the landscape (cost). Typically the roads and landings are sf objects or sp Spatial* objects and the cost is a raster.

#> Warning: package 'sp' was built under R version 4.2.3

# data set installed with roads package
demoScen <- prepExData(demoScen)
scen <- demoScen[[1]]

prRoads <- projectRoads(landings = scen$landings.points, 
                        cost = scen$cost.rast,
                        roads = scen$road.line, 
                        plotRoads = TRUE) 

By default projectRoads uses a minimum spanning tree with least cost paths algorithm (roadMethod = "mst") to connect all landings to the nearest existing road or other landing following the path with the lowest cost. Other methods available are least cost path (roadMethod = "lcp") which connects each landing to the nearest road via the least cost path but independent of other landings and snapping (roadMethod = "snap") which ignores both cost and other landings and simply connects each landing to the nearest road “as the crow flies”

For more details on how to use the package see the vignette vignette("roads-vignette", package = "roads")


Copyright (C) 2021 Her Majesty the Queen in Right of Canada, as represented by the Minister of Environment and Climate Change.


Copyright 2018 Province of British Columbia

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.