838 
Figure 1. The concept of an historical cluster (U.S.), consisting of several buildings, essentially 
organized around a churchyard provides one type of focus. The cluster may also reside in an historical 
landscape, and both are readily definable on aerial imagery. Large scale imagery is used to delimit 
the area of interest, and where othophoto mapping has been implemented, as in some states, the precise 
location is readily assessed and can readily be incorporated within a GIS. Smaller scale imagery may 
be used in subsequent management to assess land-use change threats, and ultra-large scale imagery may 
be obtained as part of a larger program to assess internal conditions of the site. 
Feature Key: Black line outlines historic cluster including church buildings and cemetery. 
Photo scale =0 50 (USDA) 
*■ i j 
m. 
Figure 2. The Visbecker Braut area (F.R. Germany), a famous prehistoric, megalithic site, illustrates 
a number of problems facing cultural resource managers. The autobahn rest area is but 125 meters from 
the site, and the autobahn itself traverses an agricultural landscape in which soil/crop marks 
relating to potential cultural resources close to the right-of-way exist. While it is apparent that 
the megalithic site is protected, the bulk of the remaining area is not and is subject to the threats 
of continued agricultural disturbance. Aside from the rescue operations needed to prepare for 
construction, the main site is now within reach of a potentially large audience, and therefore 
might be additionally enhanced and developed for public enjoyment. Large scale aerial survey in 
the adjacent landscape .geared for site detection and future planning seems appropriate. While 
modern transport routes may not be denied, every effort should be made to provide for the least 
amount of destruction along the route. 
0 100 
Feature Key: A. Prehistoric megalithic site. Photo scale = 1 “ 1 (Landesvervaltungsamt, Hannover) 
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