geo_json_duplicated_element: GTFS validation rule (archive structure) Error
A feature property is declared more than once (case-insensitive collision): only the last occurrence is kept by JSON parsers.
What the rule checks
A feature property is declared more than once (case-insensitive collision): only the last occurrence is kept by JSON parsers.
Severity: error
An error marks data that breaks the GTFS specification. A journey planner or a rider app may refuse the file, or show a wrong version of it. Correct it before publishing the GTFS.
Where it applies
The rule applies to the structure of the GTFS archive: the files it holds, their headers, their encoding and the shape of their rows.
Finding and correcting it
Open the GTFS in GTFS Express. Reading is free, and the validation, by the MobilityData validator and the rules of GTFS Express itself, lists the occurrences of geo_json_duplicated_element with the file and rows involved. The correction is made in a draft, by hand or from a brief, with the licence: the corrected GTFS is validated again before it is delivered, and the change can be undone.
In the MobilityData validator
The MobilityData GTFS validator uses the same code, geo_json_duplicated_element. Its documentation describes each rule: MobilityData validator rules.