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We feel that this complex site allocation case , including our step by step procedure , is a very effective tool for confronting students with all aspects of the GIS problem solving procedure . I realize this , first of all , it was pretty courageous to turn into an ambush even though you usually find no more than two or three people there . The final results produced by students are very diverse : ranging from very good GIS work based on sound ecological principles to relatively poor GIS work based on little expertise . The National Spatial Data Infrastructure ( NSDI ) , is a national initiative that encourages federal , state , and local governments , academia and private industry to share geographic data . But all the citations stem from votes on three Congressional bills , none of which were about a specific weapons system or group of weapons systems . The street was closed to all traffic the night before and all residents on the street were REQUIRED to remove their Bush / Cheney signs . " I laid in fire with the twin .50 s , and he got behind a hootch , " recalled Short . As a final assignment the students ( in pairs ) are required to tackle a complex site allocation problem : suggesting 2 suitable locations for new nature reserves .