I love when games use real life maps to point fictional locations. And I think I have found the Ravenwood location.
If you use the card in the diary you can find at the cabins you can see (in the bottom right) Las Vegas, the coastlike resambles that of America, specificly the californian coast.
The image is kind blurry but my best guess is that ravenwood is north west of city of Choi.
The road can be the golden State Route 99 Highway, as it goes trough the forrest around the Pine creek cemetery.