travel_time | R Documentation |
Download global travel time to a city or port data on rasters at a 30 arc-seconds (about 1 km2) resolution.
travel_time(to="city", size=1, up=FALSE, path, ...)
to |
character. "city" or "port" |
size |
positive integer indicating the size of the city or port. Can be between 1 and 9 if |
up |
logical. If |
path |
character. Path for storing the downloaded data. See |
... |
additional arguments passed to |
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 | |
SpatRaster
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
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