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002609: One or more of the shapes in the GTFS shapes.txt file are not used by any trips in the trips.txt file. These shapes will be included in the tool output, but route attributes will not be populated, and your shapes.txt data might be incorrect. Unused shape_ids: <value>

Description

GTFS shapes are a geographic representation of the paths traveled by vehicles in the transit system. The GTFS trips.txt file can contain a shape_id field, which indicates the shape associated with each trip. If the shapes.txt file contains shape_id values that are not used by any trip in the trips.txt file, these shapes represent paths that are never actually used by any vehicle. This is probably an indication that the shapes.txt file has an error or is outdated. The shapes displayed in the map may not truly represent the locations of the transit agency's routes.

Solution

Update the shapes.txt file to remove unused shapes.