validate_tides: Check if AVL data meets TIDES standards

In transittraj: Reconstruct and Visualize Transit Vehicle Trajectories

Check if AVL data meets TIDES standards

Description

The transit integrated data exchange standard (TIDES) specifies columns that should be present in AVL data tables and the data types of these columns. This function verifies if those columns are present in the input avl_df are of the correct data type. See Details for more information.

Usage

validate_tides(avl_df)

Arguments

avl_df

A dataframe of AVL data, either in GPS (longitude/latitude) form or linearized distance form.

Details

The AVL cleaning functions in this package generally require the input dataframes to adhere to the TIDES vehicle_locations table schema. The following columns and data types are checked by this validator:

• location_ping_id: Should be a character string.

• trip_id_performed: Should be a character string.

• event_timestamp: Should be a POSIXct date-time.

• vehicle_id: Should be a character string.

• operator_id: Should be a character string. This field is not standard in TIDES vehicle_locations, and is not a strict requirement for any AVL processing functions.

• longitude and latitude: Should be numeric. These fields are required only to linearize AVL data, and not used afterwards.

• distance: Should be numeric. This field is not standard in TIDES vehicle_locations, and is generated by get_linear_distances(). It is required by most other AVL processing functions.

• speed: Should be numeric. This field is not a strict requirement for any AVL processing functions.

Each AVL processing function in transittraj uses specific fields. Each function verifies that the required fields and data types are present before proceeding.

Value

A dataframe of each required field, required data type, whether the field is present, and whether the data type matches expectations.

Examples

lacmta_val <- validate_tides(avl_df = lacmta_avl)
print(lacmta_val)

transittraj documentation built on Nov. 2, 2026, 1:10 a.m.