 Since the beginning of the environmental movement during the 1970s, scientists have grappled with the complexity of environmental problems. Initial attempts to integrate the diverse nature of environmental information through manual overlays was only partially successful. The advent of more powerful computers gave scientists the opportunity to model these complex interactions through geographic information systems (GIS).
However, a GIS is less about using computer hardware and software than learning how to think spatially. The most important part of the system is the analyst's ability to recognize and understand spatial patterns. For example, a typical problem is analyzing the relationship between hydrological systems and riparian habitats.
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