Contributions to Remote Sensing of Shallow Water Depth With the Worldview-2 Yellow Band

摘要

Remote sensing of the bathymetry in shallow water of Tampa Bay is examined using the multi-spectral imagery from the Worldview-2 satellite. Utilizing the newly available yellow spectral band in a ratio algorithm, five ratio combinations are compared against a digital elevation model of Tampa Bay. Following the work of Stumpf et al. (2003) ratio algorithm and starting with the work of Loomis (2009) and Densham (2005), the yellow band was combined with the blue, green and red bands separately. These three ratio combination results were compared with the results of the more traditional blue/green combination and a green/red combination. Three transects lines were drawn in a shallow reef area in the north portion Tampa Bay, Florida on Mullet Key near Fort de Soto State Park. In water under 2 meters depth, the substrate contributions were significant in all ratio derived bathymetries. The addition of the yellow band provided more information about the bathymetry than the previous blue/green and green/red combinations by adding more combinations that utilized a reflectance level difference. The yellow band demonstrates less sensitivity to bottom type in two of the transect lines.