nelson_et_al: Accessibility to Cities layer

In mapme-initiative/mapme.biodiversity: Efficient Monitoring of Global Biodiversity Portfolios

Accessibility to Cities layer

Description

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")

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").

Source

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

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.

mapme-initiative/mapme.biodiversity documentation built on April 5, 2025, 12:47 p.m.