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cant concern. The information developed by the GIS team in the Murrah building was developed by experienced personnel working directly with the people in the best position to have the correct information—thus the information had a high degree of accuracy. Preidentified data sources, reliable data paths, and reliable remote sensing technologies, crossed-checked with other sources for validation, are what contribute to developing data that will be believed. In contrast, information gleaned from other sources, such as the results of Web searches of various public sites, is not likely to be held in high esteem. Given the rule of thumb adopted by many crisis responders—that one-third of the information is accurate, one-third is wrong, and one-third might be either right or wrong—they are likely to be reluctant to rely too much on the outside information they are provided.

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