JUNEAU, Alaska (AP) — A lens in a tiny box affixed atop a tripod spins while the box oscillates. A tiny beam of light flashes repeatedly from the lens. It pulsates. It creates a unique scan of 19 individual totem poles in the Sitka National Historical Park.
For two weeks this summer this little box completed this process three to four times around each of the poles from the ground level - and three to four times from the top of them.
These aging poles - most were crafted or restored in the 1930s, '40s, '50s and a few in the '80s - are now being digitally preserved before they've decayed forever.
The park staff has been modifying its preservation methods since it started caring for the poles in the 30s.
Michael Hess, park ranger in Sitka, said most of the poles are re-carvings. Those re-carvings were completed mostly in the 1930s-1950s.
"All of the originals were collected by John Brady to take to the St. Louis World's Fair," Hess said. "They went down there, they came back to Sitka. Nobody really knew what to do with them."
Sitka had federal land available in 1906, and that's where the totems made their new home. Except, many of them were laid down on the side of the trail and left to rot, Hess said. It wasn't until the 30s - during the New Deal era, when money became available for restoration.
"The preservation of the totem poles has been happening since the late 20th century," Hess said. "This is kind of the newest in that process, to keep the cultural objects intact. The climate of Southeast Alaska does some pretty horrific things to wood."
They've also used paraffin dips to slow the decaying process, as well as sealing, painting treating, and re-carving some pieces of the poles.
"The digital preservation of them is kind of the final snapshot," Hess said. "the final snapshot to permanently preserve the totem poles. The digital renderings are actually going to be printed out on velum and included in a special collection in the Library of Congress. The minimum standard for this preservation is to have them preserved on line drawings for the next 500 years. They're going to create what you would expect in a wire frame drawing."
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