Monitor the data quality in realtime feed

To access a detailed report for each of your realtime feeds, click 'Feed Issues' for the feed in question.

The realtime feed report includes an overview of the feed issues observed over the previous 8 days.

Your realtime feed report shows a summary of all observed issues. The summary for each issue includes:

• Severity: Categorization of data quality issues

• Last seen: Date and time when the issue was last observed

• Total quantity: The issue’s total number of instances over the past 8 days

• Max. quantity: The maximum number of occurrences per feed update over the past 8 days

Data quality issues under Severity are categorized as:

• ERROR: Error prevents the feed from being processed, and the entire feed version has been discarded

• WARN: The error is recoverable, i.e. the data is not correct, but Google discarded and/or adjusted the affected entities and moved on

• INFO: The feed has been processed, but you should double check the data.

In the feed issue summary view, click an individual issue to view specifics about that issue. You’ll see a historical graph of the issue occurrence over the past 8 days, plus  details, including:

• Severity: The issue’s severity categorization

• Cause/effect: The cause of the issue and and its possible effects

• Possible resolutions: Suggestions for potential solutions to the problem

• First seen/last seen: First and last occurrence of the issue

• Fetches affected: Percentage and number of fetches affected by the issue

• Quantity: Total quantity of issue occurrences, average per feed and the problem’s maximum per-feed occurrences over the past 8 days

• Example instances: A list of example instances of the issue

 

Under Example Instances, click the Expand Details button to review a snippet of the corresponding source data.

To access a detailed coverage report for your Realtime trip updates feeds, click 'Coverage' for the feed in question. If you provide multiple trip update feeds for the same GTFS static feed, the report will deal with the cumulative coverage of all trip updates feeds matching that one GTFS static feed.

The report include metrics about the coverage observed over the past 7 days:

• Realtime coverage by trips, over all routes: The number of trips for which in the given period we received realtime information, over the total number of trips in the corresponding GTFS feed.

• Realtime coverage by trips, over routes with at least one realtime update: The average number of trips for which in the given period we received realtime information out of the total number of trips belonging to routes with at least one trip served by realtime updates.

• Detailed route metrics: Shows routes with no coverage, with partial coverage, and with full coverage:
  

• Coverage map: Visualizes coverage with different color coding for routes with no coverage, routes with partial coverage, and routes with full coverage.

• Details and samples for each of the coverage categories:

 

For routes with partial or no realtime coverage: Obtain a list of samples of missing trips by clicking on See missing trips for a given route.

 

For all routes, clicking on [GTFS] in the route_id column re-directs to the information about the corresponding static feed.