Bathymetric data will also be collected in a separate survey over each reef and contoured through Spectra Precision contouring software or equivalent. The Triton ISIS system will allow post processing the data into a geo-referenced mosaic which will form the base map of each reef. The data will be analyzed for quality by staff of the Lake Erie Geology Group under the direction of Dr. Mackey. After initial interpretation, ground truthing and verification will begin by selection of specific locations that will require further inspection. Most ground truth activities employ the use of the Division-owned underwater towed video camera, coring and grab sampling devices.
Ground truthing is more time consuming than the original electronic data acquisition.
The quantity of time spent in the field for ground truthing will depend on complexity of original data acquisition and the corresponding ability to map the reflectivity of the material. After ground truthing, the reef mosaics will be imported into ArcView GIS software where the corrected bathymetry contours and geologic sediment substrate maps will be layered. Reproduction and distribution of the data is not a part of this proposal.