National Geographic Trail Map Overlay/Import

When we off road in national parks we are forced to purchase the National Geographic Trail map for the area we are visiting to fill in map gaps from our TRX7 to be sure we have full trail/map coverage. It would be very handy if Magellan TRX had this overlay built into their system similarly to how Gaia GPS overlays National Geographic Trail Maps in their platform. 

https://www.natgeomaps.com/apps