Spatia Data Query and Visualization Tool for Analyzing Upper Mississippi River System Data Sets Open PDF Document Details Document Type Technical Report Publication Date Mar 01, 1999 Accession Number ADA362301 Entities People Douglas A. Olsen Tags DTIC Thesaurus Topics Basic Programming Language Basic Training Data Sets Databases Ecology Geographic Information Systems Geological Surveys Illinois Information Systems Mississippi Mississippi River Monitoring Relational Databases Rivers Sampling Visualizations Water Quality