| Description |
This shapefile contains habitat polygons identifying the dominant and major geomorphological structure, biological type and percent cover, and geologic zone for 11 square kilometers of Olowalu reef off west-central Maui at a minimum mapping unit of 100 square meters. Habitats were mapped with heads-up digitization using the NOAA Habitat Digitizer Extension in ArcMap (Esri, v.10.8.2). Seafloor characteristics were based on visual interpretation of 3-band (red, green, blue) 0.5m satellite orthoimagery, 1-m-resolution acoustic backscatter imagery, lidar-derived digital bathymetric models (DBM) at 1-, 4-, and 8-m resolutions, and various surface morphometric layers derived from the three DBMs (relative position, aspect, rugosity, slope). Ground reference (n=870) and accuracy assessment (n=216) images of the seafloor were extracted from live video taken by a vessel-towed camera sled surveying shore-normal transects in waters 10-40 m depth. These data accompany the following report: Heberer, L.N., Alkins, K.C., Storlazzi, C.D., Cochran, S.A., Gibbs, A.E., Sparks, R., Stone, C., Silva, I., Martinez, T., Peralto, C., Levine, A., Stow, D., and Maloney, J., 2025, Benthic habitat map of Olowalu Reef, Maui, Hawaii: U.S. Geological Survey Open-File Report 2025–1010, 32 p., https://doi.org/10.3133/ofr/20251010. [More]
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