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Accessibility to Cities layer

Source: R/get_nelson_et_al.R
nelson_et_al.Rd

This resource is published by Weiss et al. (2018) "A global map of travel time to cities to assess inequalities in accessibility in 2015" on journal nature. Accessibility is the ease with which larger cities can be reached from a certain location. This resource represents the travel time to major cities in the year 2015. Encoded as minutes, representing the time needed to reach that particular cell from nearby city of target population range. The following ranges to nearby cities are available:

  • "5k_10k"

  • "10k_20k"

  • "20k_50k"

  • "50k_100k"

  • "100k_200k"

  • "200k_500k"

  • "500k_1mio"

  • "1mio_5mio"

  • "50k_50mio"

  • "5k_110mio"

  • "20k_110mio"

  • "5mio_50mio"

Usage

get_nelson_et_al(ranges = "20k_50k")

Source

https://figshare.com/articles/dataset/Travel_time_to_cities_and_ports_in_the_year_2015/7638134/3

Arguments

ranges

A character vector indicating one or more ranges to download.

Value

A function that returns an sf footprint object.

Note

Note, that the figshare server applies a rather restrictive rate limit thus frequently resulting in opaque error codes (see https://github.com/mapme-initiative/mapme.biodiversity/issues/308). Please set GDAL configuration options to sensible values in case you are running into this issue, e.g.: Sys.setenv("GDAL_HTTP_MAX_RETRY" = "5", "GDAL_HTTP_RETRY_DELAY" = "15").

References

Weiss, D. J., Nelson, A., Gibson, H. S., Temperley, W., Peedell, S., Lieber, A., … & Gething, P. W. (2018). A global map of travel time to cities to assess inequalities in accessibility in 2015. Nature, 553(7688), 333-336.