National Geographic Maps will make available hundreds of maps from its Trails Illustrated line through Avenza Systems Inc.âs popular, award-winning PDF Maps app. The addition of these maps, the most popular outdoor recreation maps in North America, augments the PDF Maps app digital map database by incorporating trail maps from a world-renowned source. It also increases National Geographic Mapsâ reach within the mobile consumer market, giving more consumers than ever access to the Trails Illustrated line. Trail maps from many of Americaâs most popular national parks have already been uploaded to the app. With many Ranger Districts throughout the country discontinuing visitor services, Avenzaâs PDF Maps app provides an alternative for outdoor enthusiasts planning a trip in remote areas where Internet service is not always available to stream detailed map content. www.avenza.com.