Derrick, You might be able to use some of the open source Mac panorama tools that are out there, such as hugin and friends, although autopano-sift is not working for me on the mac right now, the other tools are.
You should also look at PTMac and the panorama tools photoshop plugins which are at http://www.kekus.com I'd be interested in hearing how this works out. Chris which acts as a shell to the Derrick J Brashear wrote: > I have a variety of data sources I'm trying to use together for the > purpose of understanding a neighborhood, including 400dpi 100 foot per > inch topographic maps, 1938 vintage aerial photos, modern aerial photos, > and a plant map updated to 1983. Only the modern aerial photos are > georeferenced. > > The vintage aerial photos are known to have distortion, so simple > rubbersheeting is out: > http://gisconference.cas.psu.edu/2005/proceedings/1_tues_1130.pdf > > Of course, that piece of software is rather costly for a hobbyist. I > assume the answer for me is GRASS (I have a Mac, anyway, so....) > > The question is what else do I want? My goal is to georeference all the > pieces, and then be able to do overlays. Worse, there's a little > distortion in the scanning of the maps > (http://images.library.pitt.edu/g/geotopo/) so I need to figure out how > to stretch them slightly and rotate to get a clean join if I want to > mosaic them, and Photoshop is being... less than helpful. I can crop > down to the neatline, but the result is neither square nor exactly the > right dimension to match its neighbor. > > Is there anything I want instead of GRASS, and regardless do I want > something other than Photoshop (and if so, what?) > >
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