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Date: | Wed, 7 Jun 2006 02:29:56 -0400 |
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Although I only have experience rubbersheeting in Arc GIS I would have to
caution being overly interested in conducting this process using an overabundance
of points. As part of a project with the park service, we needed to alter
late 19th century GLO maps to reflect the reality of later land surveys from
the 1940s and 1950s. This worked fine but required data checking to be sure
the process did not overly compromise points and linear features which were
reasonably accurate from the GLO maps. As we began to use over nine control
points, the rubbersheeted maps ceased to improve in their accuracy, and indeed
began to become less accurate. Remember the process of rubbersheeting is
basically an averaging process which may further compromise the accuracy of some
data. Arc GIS or some other Arc View program seems to me the best choice as it
retains georeferencing which is really the only way to see if your
rubbersheeting process is accomplishing your goals. Perhaps others will disagree but my
experiences favor using this program.
Regards,
Stathi
______________________________________________________
Efstathios I. Pappas, MS
Doctoral Student
Department of Anthropology/096
University of Nevada, Reno
Reno, NV 89557
(775) 323-5730
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