1. Oregon State University, School of Civil and Construction Engineering, Corvallis, OR 97331, U.S.A.
2. University of New Hampshire, Center for Coastal and Ocean Mapping, Joint Hydrographic Center (CCOM - JHC), Durham, NH 03824, U.S.A.
3. University of Vermont, Spatial Analysis Laboratory, Burlington, VT 05405, U.S.A.
4. Earth Resources Technology, Inc., Laurel, MD 20707, U.S.A.