Abstract #301519

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JSM 2003 Abstract #301519
Activity Number: 168
Type: Contributed
Date/Time: Monday, August 4, 2003 : 2:00 PM to 3:50 PM
Sponsor: Section on Statistics & the Environment
Abstract - #301519
Title: Generating Accuracy Measures for Computer-based Queries of Geospatial Data
Author(s): Courtney D. Kies-Bokenkroger*+ and Sarah M. Nusser
Companies: Iowa State University and Iowa State University
Address: 2713 Hampton, Ames, IA, 50010-7132,
Keywords: geospatial data ; land cover maps ; accuracy assessment
Abstract:

Computer-based queries of geospatial data sets have become common with the vast amount of spatial data available to users. In most situations, the quality measures associated with the original data are not incorporated into to the query process, and accuracy for the data generated in response to the query is not reported. We explore methods and the level of information needed to generate new accuracy measures for two possible computer-based queries for a land cover map. The queries addressed are (1) generating a new map that represents a subregion of the original map, and (2) generating a new map with one or more sets of land cover classes collapsed to form broader land cover categories than the original set of classes. Results are illustrated using the thematic accuracy assessment data for a portion of Iowa's GAP Analysis Project (GAP) land cover map.

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