Tutuila (American Samoa) Coastal Terrain Model

This dataset is a compilation of a USGS 1:24000 DEM, multibeam sonar bathymetry and bathymetry derived from Ikonos satellite imagery to provide for terrestrial data, depths from 15 m to 250 m and depths from 0 m to 15 m, respectively. The compilation creates a coastal terrain model (CTM) of the island of Tutuila, American Samoa. The image processing required to derive bathymetry from spectral data were performed using the software package ENVI 4.3. The DEM, multibeam bathymetry and derived bathymetry datasets were compiled and regridded using the ArcGIS 9.2 software package. Cell resolution is 5 m. The CTM was created to support terrain analyses that cross the land-sea interface to study the impact of human settlement density to the health of coral reefs. This dataset was created by Kyle Hogrefe as the foundation for two papers that entail his thesis entitled Derivation of Near-shore Bathymetry from Multispectral Satellite Imagery used in a Coastal Terrain Model for the Topographic Analysis of Human Influence on Coral Reefs available from Oregon State University. Additionally the first paper of this thesis, Derivation and Integration of Shallow-water Bathymetry: Implications for Coastal Terrain Modeling and Subsequent Analyses, has been submitted to the journal Marine Geodesy and is under review for publication in the December Special Issue.