Takeoffs that could not be located:

• Unknown takeoff — no linkable takeoff on flightlog.org (145 flights)
• Taucho — outside the curated takeoff dataset (1 flight)
• Gourdon, Le Haut Montet — outside the curated takeoff dataset (1 flight)
• Thorenc, Col de Bleine — outside the curated takeoff dataset (1 flight)
• Gréolières, Mt. Cheiron — outside the curated takeoff dataset (4 flights)
• Roquebrune Cap-Martin, Mont-Gros — outside the curated takeoff dataset (1 flight)
• Bassano, Col del Pupolo "Da Bepi" (teppestarten) — outside the curated takeoff dataset (1 flight)
• Grindelwald, First — outside the curated takeoff dataset (1 flight)
• Rigi Kulm, Goldau — outside the curated takeoff dataset (1 flight)
• Col de Forclaz- Montmin — outside the curated takeoff dataset (13 flights)
• Marlens, Annecy — outside the curated takeoff dataset (1 flight)
• Montlambert — outside the curated takeoff dataset (2 flights)
• Valle de Bravo, El Peñon — outside the curated takeoff dataset (16 flights)
• Valle de Bravo, La Torre "Torres" — outside the curated takeoff dataset (2 flights)
• Annecy, Montmin, Col de la Forclaz — outside the curated takeoff dataset (40 flights)
• Bassano, Costalunga — outside the curated takeoff dataset (23 flights)
• Chamonix, Plaine Joux — outside the curated takeoff dataset (1 flight)
• Åre, Mörvikshummeln — outside the curated takeoff dataset (1 flight)
• Annecy, Talloires, Planfait — outside the curated takeoff dataset (2 flights)
• Åre, Tväråvalvet — outside the curated takeoff dataset (3 flights)