Distribution of Submerged Aquatic Vegetation in the Lower St. Johns River: 2006 Atlas

摘要

This atlas contains Lower St. Johns River Basin submerged aquatic vegetation (SAV) data for 2006. Ground-truthing transects and ground-truthing polygons from field-collected data were mapped and assessed, and hyperspectral imagery was collected and analyzed. Hyperspectral imagery classification was generally successful and appeared to identify a greater proportion of the existing SAV than previous attempts using true-color photo interpretation. Based on the imagery classification, 1,273 acres of SAV were mapped within the mainstem of the lower basin and Doctors Lake. In some cases, imagery classification and transect data gave divergent bed-size estimates. Reasons for those discrepancies are briefly discussed.