From aerial photography flown in 1989 4. ANTI 5 foot contours 6. Five foot contours of the area which includes the park. This is the source for the park's elevation model, it's slope and aspect maps. This data is excellent for the creation of elevation models and other derivatives, such as slope and aspect maps.
Data is free and available on line.
The National Park Service provides this data as a service to the global community. No guarantees, warantees or assurances are conveyed with this data. This disclaimer applies both to individual use of the data and aggregate use with other data. This data represents five foot contours. Horizontal data referenced to NAD27 2.