The spatial component of subsurface engineering data has historically been ignored because of the lack of appropriate analysis tools and techniques to account for this information. The development of powerful computed-based spatial information systems over the past decade has provided the necessary core technology for engineers to develop customized analysis environments for engineering design purposes. This paper describes a prototype spatial liquefaction analysis system that resulted from the integration of several commercial software packages capable of a range of spatial analysis functions with custom geotechnical earth- quake engineering analysis software routines.
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