Viking's Grave & Sunken Ship: Photogrammetry Transforms Archaeological Sites!
Mapping an archaeological dig takes plenty of measuring, photographing, note-taking and drawing plus a great deal of time. Now, most of this work can be done with photogrammetry -- a method that uses two dimensional images of an archaeological find to construct a 3D model. In many ways, this is much more precise than older, more time-consuming methods.
Archaeologists are already putting this technique to use. When a possible Viking grave was found in Skaun in Sør-Trøndelag (2014), the excavation site was mapped using photogrammetry.
For archaeologists studying a site, the manner in which artifacts are found, how deeply they're buried, and where they're placed in relation to each other can provide a lot of information. Photogrammetry also makes it easier for archaeologists to share their findings with others as the 3D models produced can be saved as regular PDF files which they can send to colleagues for feedback.
Example of a Viking archaeological site: https://ntnu.box.com/shared/static/51nxbf6fi269suwklzi574za62j3eric.pdf
Marine archaeologist Fredrik Skoglund of NTNU University Museum tried this with the Dutch ship "De Grawe Adler" (the Grey Eagle), which sank in 1696 by Strømsholmen in Hustadvika, and was discovered in 1982 when dredging for sand destroyed parts of the ship.
"I swam along the whole length of the wreck a few years ago and took pictures," Skoglund says.
But Skoglund did this without ever considering the possibility of making a 3D model of the wreck. The photos were taken underwater making it slightly harder to put them together, but not impossible. If the results are precise enough, they can be used to monitor the ship's decomposition, which can be difficult to see. This will help put in place appropriate protection measures.
Model of "De Grawe Adler": https://ntnu.box.com/shared/static/5cdo0m36b94def106vd8dhnh4l7gh6la.pdf
In the future, perhaps we'll be able to put on 3D-glasses and virtually visit an excavation site.
NTNU University Museum - Detailed image of a shield boss found in what is likely a Viking's grave in Skaun
Additional:http://en.wikipedia.org/wiki/Archaeologyhttp://en.wikipedia.org/wiki/Photogrammetry#vikings #archaeology #photogrammetry #3dmodeling #3d #computational #algorithms #computer #science #technology #sciencesunday #scienceeveryday