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gepaf

CRAN status Project Status: Active – The project has reached a stable, usable state and is being actively developed.

The goal of gepaf is to encode and decode the Google Encoded Polyline Algorithm Format.

Example

Encoding

library(gepaf)
coords <- data.frame(
  lat = c(38.5, 40.7, 43.252),
  lon = c(-120.2, -120.95, -126.453)
)
encpoly <- encodePolyline(coords)
encpoly
#> [1] "_p~iF~ps|U_ulLnnqC_mqNvxq`@"

Decoding

coords <- decodePolyline(enc_polyline = "_p~iF~ps|U_ulLnnqC_mqNvxq`@")
coords
#>      lat      lon
#> 1 38.500 -120.200
#> 2 40.700 -120.950
#> 3 43.252 -126.453

References :

Mostly a translation of https://github.com/mthh/polyline_ggl/ (itself a modest translation of other well known available implementations such as Node.js Mapbox one)

Alternative

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.