Using color component overlays for result visualization in a classification by sketch system

Geographic Information Systems (GIS) are notoriously difficult for users unfamiliar with the field, both for query formulation and for interpretation of display and results. Gaia is a graphical classification system which reduces this difficulty by using a sketch-like classification-by-example input interface, a fuzzy match of the classification against the GIS database, and the use of hue and saturation overlays to present results. This work presents Gaia's interface and result visualization mechanism.