Abstract
GIS (Geographic Information System) is an effective tool also to visualize regional environment information in bird's-eye view. In this paper, some examples of the examination of the visualization technique to make our WEB site, "Osaka University Yodogawa Basin Project", more rational as an environment-information offer site. They are, (1) Display of the historical change as a diagnostic technique, (2) Selection standard of colors used for visualization, and (3) Display of the multi-dimension information by superposition of colors. Although the example which utilizes WEB-GIS for offer of environment information is predicted to increase from now on, the argument about the function required of environmental GIS has just started. From now on, the further examination will be required.
