Tuesday, September 8, 2009

Glenlyon Mosaic

A major goal of this condition assessment is to build on work that was accomplished in the early ‘80s by the Submerged Resources Center and ISRO Dive team. As we apply the same archeological survey techniques used decades ago, we also have the benefit of underwater digital imaging technologies. In this photographer’s opinion, digital photography has been one of the most valuable advancements in underwater survey. The ability to generate hundreds of instantly available images vs. 36 pictures on traditional film has increased the data collection and documentation of these sites dramatically. One technique the SRC has used successfully over the past few years to enhance the interpretive value of shipwreck sites is by stitching several digital images together to create a mosaic. This process offers a view of a site unavailable even to the divers from one static viewpoint limited by visibility. It also has the ability to communicate the massive size and scale of these goliath vessels strewn across the reefs of Isle Royale.

In this mosaic of the Glenlyon shot three days ago, Steve Martin examines the shaft connecting the expansion engine with the broken prop resting on the reef in 45’ of water. This image was created by stitching 34 vertical images together and provides a panoramic viewpoint of the sites most impressive feature. - Brett Seymour, ISRO Picture of the Day

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