more applicable in the context of understanding the full costs of building the rectenna. These environmental variations were not addressed in the reference system explicitly, although they are implicitly addressed in the range of costs to be expected (lowest cost and highest cost per satellite and rectenna pair). Additionally, certain of the variables mapped in this study are potential inclusion variables. In other words, there are aspects of these variables that may make location within their spatial dominion desirable. For example, "other federal lands" (excluding national forests) would be potentially good sites since 25% or more of the mapped area is under federal control. These other federal lands are relatively inexpensive; controversial regarding the aggregation of a 50,000 acre contiguous parcel may be less than would be the case where private property would have to acquired for the entirety of the site. Therefore, there are many nuances of the information presented in Section III. For this reason, a major attempt was made in this study to fully document the approach and assumptions so that additional variables can be considered and the impact of individual variables can be traced. In other words, a critical element of this approach is to determine those variables that "drive" the locational decision. A further result may be the identification of options that have not been considered heretofore. 1. Data Encoding, Storage, Access and Display: Prior to analysis per se, the data utilized for analytical purposes was entered into the Rice Architecture Geographic Information System (RAGIS). The basic elements of RAGIS are shown in Figure 3. One of the central features of the information system is the use of a nost language to support and control its operations. The computer language Speakeasy (developed at Argonne National Laboratory, see Cohen and Pieper, 1977) was used since it stresses the use of English syntax, conversational input-output modes and on-line interactions. Speakeasy is an extensible language that comes with broad general
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