Dear Florian, thank you for this interesting puzzle!
Before I venture into concrete suggestions, allow me to ask some question in the form of assumptions you can confirm, reject, or discuss: The establishment of a hypothetical viewpoint is used to establish a location of the canvas. That means the following: 1. There is a 3D model of a landscape where each point (also those making up lines and polygons) are normal (x,y,z) coordinates in some coordinate system. 2. The hypothetical/assumed viewpoint of the photographer or the painter is a point in the same coordinate system. 3. Each point of the canvas (representing a painting or a photography) being put into the landscape is a point in the same coordinate system. Thus the canvas as a whole is an area in that coordinate system. If this is so, we might very well talk about something added to a pre-existing 3D model. If not, I would be happy to be enlightened and hopefully manage to dig further. All the best, Øyvind > Am 26.10.2021 um 10:28 schrieb Florian Kräutli via Crm-sig > <[email protected]>: > > Dear all, > > I have a data modelling challenge I would need some advice with. > > We work with a collection of geographic depictions of Switzerland. This > includes photographs, paintings, prints, sketches, etc. We collaborate with > Smapshot <http://smapshot.heig-vd.ch/> who developed a method for aligning > landscape photographs with a 3D model of the physical landscape. An example > from our own collection can be seen here: > https://smapshot.heig-vd.ch/visit/204037 > <https://smapshot.heig-vd.ch/visit/204037> > > Using this method we can determine the possible viewpoint of a photographer > when taking a picture, or the viewpoint from which an artist may have > produced sketches of a landscape. In terms of data, we obtain the simulated > position and view of the photographer/artist as coordinates (lat/long), > altitude, azimuth, tilt, roll and focal view. > > I'm debating now how to model this obtained data in CIDOC-CRM. I would > suggest a S7 Simulation or Prediction for the process of using the Smapshot > app to determine a viewpoint of an image. This process P140 assigns an > attribute to a E36 Visual Item, namely that the E36 Visual Item (the image) > P138 Represents a view. What is this view? Can we say it is a E53 Place? Or > is there a more suitable entity for describing such a (simulated) view? > > One could also say that the data defines a E53 Place from which an image has > been created. However, while we can say this with some degree of certainty > for photographs, a painting of a landscape might have been created using a > combination of several viewpoints as well as, of course, use of imagination > on and off-site, so I would be hesitant to make a statement about the > physical location of an artist when creating a painting. > > I would be grateful for your input! > > All best, > > Florian > > _______________________________________________ > Crm-sig mailing list > [email protected] > http://lists.ics.forth.gr/mailman/listinfo/crm-sig
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