The diverse ecosystem within [the Salt River Bay National Historical Park and Ecological Preserve, U.S. Virgin Islands] includes a large mangrove forest, a submarine canyon, coral reefs, seagrass beds, coastal forests, and many other natural and developed landscape elements. ... A comprehensive spatial inventory of these ecosystems is required for successful management. To meet this need, the National Oceanic and Atmospheric Administration (NOAA) Biogeography Program, in consultation with the National Park Service (NPS) and the Government of the Virgin Islands Department of Planning and Natural Resources (VIDPNR), conducted an ecological characterization ... [that] consists of three complementary components: a text report, digital habitat maps, and a collection of historical aerial photographs.