Abstract
 Survey Technique for Underwater Digital Photography with Integrated GPS Data Track: Water Resources Author(s): Tim Siwiec This survey technique is an inexpensive method of conducting impact analysis and shoreline inventory of submerged aquatic resources by means of geo-located photo documentation. This technique is capable of identifying, mapping, and recording the exact locations of submerged aquatic resources in low visibility waters. This is accomplished by a two person SCUBA dive team surveying the underwater environment by documenting the seafloor with an underwater digital camera taking photos at regular intervals along a contour of the shore. An inexpensive recreational GPS device is diver-towed in a raft directly above the dive team which records positions throughout the dive. Commercial software is later used to relate the GPS information to the digital photos resulting in geo-located digital photos that can be viewed on a map or in a GIS for later analysis of the seafloor environment. Tim Siwiec U.S. EPA Region 10 - Seattle 1200 6th Ave EMI -095 Seattle , WA 98101 US Phone: 206-553-2147 E-mail: siwiec.tim@epa.gov |
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