Type:	Package
Title:	Google Encoded Polyline Algorithm Format
Version:	0.2.0
Description:	Encode and decode the Google Encoded Polyline Algorithm Format. See https://developers.google.com/maps/documentation/utilities/polylinealgorithm for more information.
License:	GPL-3
Imports:	bitops
Suggests:	tinytest
URL:	https://github.com/riatelab/gepaf
BugReports:	https://github.com/riatelab/gepaf/issues
RoxygenNote:	7.3.2
Encoding:	UTF-8
NeedsCompilation:	no
Packaged:	2024-10-16 14:07:37 UTC; tim
Author:	Matthieu Viry [aut], Timothée Giraud [ctb, cre]
Maintainer:	Timothée Giraud <timothee.giraud@cnrs.fr>
Repository:	CRAN
Date/Publication:	2024-10-16 14:30:02 UTC

Google Encoded Polyline Algorithm Format

Description

Encode and decode the Google Encoded Polyline Algorithm Format.
See the documentation here:
https://developers.google.com/maps/documentation/utilities/polylinealgorithm.

Note

Mostly a translation of https://github.com/mthh/polyline_ggl/ (itself a modest translation (i.g no GeoJSON wrapper, etc.) of other well known available implementations such as Node.js Mapbox one).

Author(s)

Maintainer: Timothée Giraud timothee.giraud@cnrs.fr (ORCID) [contributor]

Authors:

• Matthieu Viry matthieu.viry@cnrs.fr (ORCID)

See Also

encodePolyline, decodePolyline.

Decode a Google Polyline to a Data Frame

Description

Decode a Google polyline to a data frame of coordinates.

Usage

decodePolyline(enc_polyline, factor = 5)

Arguments

Value

A data frame of latitudes and longitudes is returned.

Examples

coords <- decodePolyline(enc_polyline = "_p~iF~ps|U_ulLnnqC_mqNvxq`@")
coords

Encode Coordinates to Google Polylines

Description

Encode a data.frame of coordinates to a Google polyline.

Usage

encodePolyline(df_coords, factor = 5)

Arguments

Value

An encoded polyline is returned.

Examples

coords <- data.frame(
  lat = c(38.5, 40.7, 43.252),
  lon = c(-120.2, -120.95, -126.453)
)
encpoly <- encodePolyline(coords)
encpoly