Function export_hmm_selected_path 

pub fn export_hmm_selected_path<P: AsRef<Path>>(
    debug_info: &DebugInfo,
    output_path: P,
) -> Result<(), ProjectionError>

Export Phase 5 – Selected Viterbi path netelements as GeoJSON

Produces a FeatureCollection with LineString features only for the netelements that appear in the final Viterbi path (including topological bridge segments).

Properties per feature:

• netelement_id – netelement identifier
• avg_emission_probability – average emission probability (0 for bridges)
• position_count – number of GNSS positions associated (0 for bridges)
• is_bridge – whether this segment is a topological bridge