{
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  "Package": "traveltime",
  "Title": "Calculate Travel Times Over Space",
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  "Description": "Calculate travel time across a landscape from a set of\nuser-specified locations, over a friction surface describing\nthe time taken to cross each cell. Implements the least-cost\ntravel time approach of Weiss et al. (2018)\n<doi:10.1038/nature25181> and Weiss et al. (2020)\n<doi:10.1038/s41591-020-1059-1>, and provides convenient access\nto their global walking and motorised friction surfaces via the\n'malariaAtlas' package. Travel times are computed with 'terra'.\nSee Ryan et al. (2025) <doi:10.12688/gatesopenres.16356.1> for\nfurther details.",
  "License": "MIT + file LICENSE",
  "Copyright": "The 'stations' data contains information from the Land\nTransport Authority of Singapore, made available under the\nSingapore Open Data Licence version 1.0; see ?stations.",
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  "_expires": "2027-02-08T19:04:03.000Z",
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