A MULTI-WINDOW GIS APPROACH FOR WATER QUALITY DATA ANALYSIS

For many water quality studies,a data analyst,or modeler, may need to know the spatio-temproal patterns of the data sets and their relationships in both pre-processing and post-processing. Geographic Information System(GIS) can provide an exploratory spatio-temporal data analysis environment with its capability of spatio-temproal data query, logical and arithmetical operations,visualization, and the integrated statistical functions.This paper will introduce the basic concept and the framework of a GIS exploratory data analysis module (GISEDA) with an emphasis on a multi-window approach for the spatio-temporal pattern analysis of water quality data.A water quality database of GEO-WAMS,a GIS-based watershed modeling support system, has been used to test the prototype of GISEDA.