travel_time: Travel time to a city or port

In geodata: Download Geographic Data

Travel time to a city or port

Description

Download travel time to a city or port data on rasters at a 30 arc-seconds (about 1 km2) resolution.

Usage

travel_time(to="city", size=1, up=FALSE, path, ...) 

Arguments

to	character. "city" or "port"
size	positive integer indicating the size of the city or port. Can be between 1 and 9 if to="city" or between 1 and 5 if to="port". See Details
up	logical. If TRUE the travel time to a city of the size chosen or larger is returned
path	character. Path for storing the downloaded data. See geodata_path
...	additional arguments passed to download.file

Details

Description of the the size argument.

to="city"

	size	Inhabitants
	1	5,000,000 to 50,000,000
	2	1,000,000 to 5,000,000
	3	500,000 to 1,000,000
	4	200,000 to 500,000
	5	100,000 to 200,000
	6	50,000 to 100,000
	7	20,000 to 50,000
	8	10,000 to 20,000
	9	5,000 to 10,000

to="port"

	size	Description	Number of ports
	1	Large	160
	2	Medium	361
	3	Small	990
	4	Very small	2,153
	5	Any	3,778

Value

SpatRaster

References

Nelson, A., D.J. Weiss, J. van Etten, A. Cattaneo, T.S. McMenomy & J. Koo, 2019. A suite of global accessibility indicators. Scientific Data 6: 266. doi:10.1038/s41597-019-0265-5

Version 3 (2019-05-15) from https://figshare.com/articles/dataset/Travel_time_to_cities_and_ports_in_the_year_2015/7638134/3

Examples

ttime <- travel_time("city", 2, path=tempdir(), quiet=TRUE)

geodata documentation built on Oct. 13, 2023, 9:07 a.m.