Figure 6. Maps along which Chirp sub-bottom and SWATHplus® data were collected: (A) in the northernmost St. Clair River area (sidescan-sonar data also were collected along shore-parallel tracklines); (B) at Marysville, MI; and (C) at Port Lambton, Ontario. Tracklines are shown in red. (2005 orthophoto base from Michigan State University, Remote Sensing & GIS Research and Outreach Services, USDA-FSA Aerial Photography Field Office.) Click on figure for larger image (1.45 MB).