under the jurisdiction of the federal government, and they may be utilized for multiple purposes. Included in this category are national forests, as well as lands with greater than 25% ownership by the Federal government. While these lands may not be indiscrim- ately used, they are potentially available as sites for rectennas. Reliability of the Data: The areas coded as other federal lands also were obtained from the U.S.G.S.'s map titled "Federal Lands". The major shortcoming of this information is that much of the land area coded as other federal lands is only partially under the control of the federal government. While this partial ownership is helpful in aggregating 50,000 + acres of land, the mapped information is misleading if one assumes all of these lands are under federal control. This variable was also coded if present in a cell. Spatial Coverage: Other federal lands are coded in 3606 grid cells. C. NATIONAL FORESTS - FIGURE 6 Rationale: Although multiple use of National Forests is allowed under Federal law, the conversion of portions of these forests into sites for receiving antennas would be opposed by environmental groups and the U.S. Department of Agriculture. Therefore, these national forests have been separated from the "Other Federal Lands" category and are mapped separately. From an analytical standpoint, these lands are considered as potential exclusion areas, although as a practical matter, these areas should not be considered as being available for rectenna sites unless no other alternative sites exist in the region of the United States being analyzed. Reliability of the Data: The areas coded as National Forests also were taken from the USGS map of federal lands. This data is considered as being highly reliable and the variable was mapped if it was present within the grid cell. It should be noted that National Grasslands were
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