Create the observation location table for type B

Reduces a type B table to one row per observation location and splits location_name into its start and end points on the arrow separator.

Usage

jartic_type_b_loc_tiny(data)

Arguments

data

A type B table, as returned by read_jartic_traffic().

Value

A data.table of unique locations with source_code, location_no, location_from, location_to and meshcode10km.

Details

The name is split on the first arrow (\U{2192}) only, which makes the result well defined for every value:

• no arrow: the whole name stays in location_from and location_to is NA;

• more than one arrow: everything after the first arrow is kept in location_to, so no part of the original name is discarded;

• NA: both columns are NA.

Examples

d <- read_jartic_traffic(
  system.file("dummy", "type_b.csv", package = "jarticr")
)
jartic_type_b_loc_tiny(d)
#>    source_code location_no location_from location_to meshcode10km
#>         <char>       <int>        <char>      <char>       <char>
#> 1:          36           1      徳島駅前      県庁前       513376
#> 2:          36           2   APAホテル前        南口       513376