Notes on verification

Marker count (~330,000) is corroborated by an independent source; the 300,000 km network length figure has only order-of-magnitude support from an older Larousse entry using a different total marker count, and the exact IGN table pairing both figures with 'good condition' qualifier could not be directly confirmed. [tier=bronze indep_score=0.525 clusters=2 claim_tier=notable | framework convergence=partial on IGN's own network inventory of leveling markers and line lengths (NGF/IGN69 and related networks) (upstreams: Institut national de l'information géographique et forestière (IGN) leveling network records) — publishers independent, evidence may not be | kind=empirical eligibility=medium (extractor: empirical/high)]