Possibly an easy way, if you know the precise location and orientation of one house, is to obtain a satellite image file, overlay that house on it, resize the photo to the same scale as the satellite image and see if you get any correlation. Modern town layouts are sometimes still based on very old ones.
I can't think of a way of extrapolating complete 3D data from a photograph unless you have some addtional information, such as the distance from the camera of some parts or the size of some objects, as well as knowing the equipment used. > > From: "Lasse Karlsson" <[EMAIL PROTECTED]> > Date: 2008/01/30 Wed AM 09:37:20 GMT > To: "Pentax-Discuss Mail List" <pdml@pdml.net> > Subject: For the experts. Determening distances in a photograph. > > Hi all, > > I'm doing some research on the earliest constructions of my hometown, > Mariehamn. > > At the link below there is one very early photograph of the town, from > around 1870. In it there are still a number of houses, farms, of the village > where the town was founded in 1861. I'm trying to establish the exact > location of these constructions, so that I can draw them on a current map or > walk there and say: This is the south-west corner of that house, this is... > etc.. > > (The photograph, originally in B&W, is a "working copy" of mine, where I've > added a few things in color just to help me see various parts more clearly.) > > The constructions which I'm interested in, are to the left, on the hill, as > well as on the slope towards the photographer. > > I know, or will be able to pin down the exact locations of some houses, or > corners thereof. Some of these have been marked with a blue "x". > > Now, I believe that it should be possible, to actually determine the exact > locations of these buildings just by going by this photograph. (Let's say it > was shot with a lens equalling 50mm on 35mm film camera.) > > Am I correct or mistaken? > > If it's possible, can anybody help me out in how to go about doing it, or do > I have to redo my geometry classes? > > http://photo.net/photodb/photo?photo_id=6894839&size=lg > > > Thanks for your comments, > Lasse. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
