High Resolution Hydrography at Fathom Five National Marine Park

Since 2001, the Canadian Hydrographic Service, Department of Fisheries and Oceans Canada (CHS), has been collaborating with Parks Canada to conduct high resolution mapping projects both in the Great Lakes and Arctic waters. Fathom Five Underwater Park was the focus of a multi-year, multi-departmental program involving both Parks Canada and Geological Survey of Canada which took place between 2001 and 2007. During this period, the primary data acquisition tool was multi-beam sonar.

Andrew Leyzack

Andrew Leyzack
The Canadian Hydrographic Service

This technology has set precedence for our ability to remotely sense and geo-reference the unique geological and man-made features of the area with a high degree of resolution and positional accuracy. Lake Huron’s exceptional water clarity made Fathom Five a candidate for the use of airborne laser (LiDAR) as an alternate data acquisition tool; however not until very recently was LiDAR technology implemented there. A 2013-14, CHS survey of the south coast of Manitoulin Island was extended to include an area west of Cove Island where previous multi-beam surveys had ended.

This presentation will summarize and compare sonar and LiDAR technology as applied to high-resolution mapping of the lakebed at Fathom Five Underwater Park.

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