Convert GPS-like data.table to a Simple Feature points object

Source: R/gps_as_sfpoints.R

Convert a GPS data stored in a data.table into Simple Feature points.

gps_as_sfpoints(gps, crs = 4326)

Arguments

gps

A data.table with timestamp data.

crs

A Coordinate Reference System. The default value is 4326 (latlong WGS84).

Value

A simple feature (sf) object with point data.

Examples

library(gtfs2gps)
library(magrittr)

fortaleza <- read_gtfs(system.file("extdata/fortaleza.zip", package = "gtfs2gps"))
#> Unzipped the following files to /tmp/Rtmp8QhZHv/gtfsio:
#>   * agency.txt
#>   * calendar.txt
#>   * routes.txt
#>   * shapes.txt
#>   * stop_times.txt
#>   * stops.txt
#>   * trips.txt
#> Reading agency.txt
#> Reading calendar.txt
#> Reading routes.txt
#> Reading shapes.txt
#> Reading stop_times.txt
#> Reading stops.txt
#> Reading trips.txt
srtmfile <- system.file("extdata/fortaleza-srtm.tif", package="gtfs2gps")

subset <- fortaleza %>%
  gtfstools::filter_by_weekday(c("monday", "wednesday")) %>%
  filter_single_trip() %>%
  gtfstools::filter_by_shape_id("shape806-I")

for_gps <- gtfs2gps(subset)
#> Converting shapes to sf objects
#> Using 1 CPU cores
#> Processing the data
for_gps_sf_points <- gps_as_sfpoints(for_gps)