Presentation on Evaluating the Creation and Preservation Challenges of Photogrammetry-based 3D Models. Michael J. Bennett. University of Connecticut. May 21, 2015.
Photogrammetry allows for the creation of 3D objects from 2D photography, which mimics human stereo vision. There are many steps in the process, images, masks, depth maps, models, and textures. The question is, what should be archived for long term digital preservation? When models are output into an open standard, there is data loss, since “native 3D CAD file formats cannot be interpreted accurately in any but the original version of the original software product used to create the model.”
General lessons from archiving CAD files, are that, when possible, the data should be normalized into open standards. But native formats, which are often proprietary, should also be archived. With Photogrammetry Data, the author reviews some of the options and recommendations. There are difficulties with archiving the files, and also organizing the files in a container that are documents the relationships of the files. Digital repositories can play a role in the preservation of the 3D datasets.
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