Accuracy Requirements for GIS-Based Seismic Risk Assessmentsby Philip C. Emmi, Univ of Utah, Salt Lake City, United States,
Abstract: Accurate assessments of potential earthquake damage and casualty risk are essential to the design of seismic hazard mitigation policies and seismically oriented engineering practice. More recently, seismic risk assessments (SRAs) have been developed withing geographic information systems (GIS). The use of GIS facilitates the manipulation of spacially reference data, expands spatial analytical capabilities and enhances visualization of modeling results. Issues of accuracy and the propagation of error within SRAs are poorly understood. Included are concerns about measurement error, model specification error and the amplification of error through the use of multiplicative and exponential functional forms. Implementing SRAs within a GIS adds error that are uniquely associated with digital cartographic representation.
Subject Headings: Geographic information systems | Seismic tests | Seismic effects | Errors (statistics) | Information systems | Seismic design | Risk management
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