Welcome to Visual Data Analytics Web (VDAW) Geographic Information Systems (GIS)!
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The Visual Data Analysis (VDA) Geographic Information System (GIS) is a computer-based tool that allows users to store, analyze, visualize, and interpret geographic data.
Caution. This document is in a stage of development. It varies as to completeness by topic covered.
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VDA GIS tools are structured for online (VDAW4/iVDA) and offline (VDAD) use and operation with Windows, Mac and iPhone devices.
This document is a user's guide VDAW4 and iVDA. These tools may be used with user projects or VDA Projects.
See available projects at this main project list. This document is provides a summary of basic VDAW4/iVDA usage.
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Updated: 9/17/2025