  In Geographical Information search, map visualization can challenge the user
because results can consist of a large set of heterogeneous items, increasing
visual complexity. We propose a novel visualization model to address this
issue. Our model represents results as markers, or as geometric objects, on
2D/3D layers, using stylized and highly colored shapes to enhance their
visibility. Moreover, the model supports interactive information filtering in
the map by enabling the user to focus on different data categories, using
transparency sliders to tune the opacity, and thus the emphasis, of the
corresponding data items. A test with users provided positive results
concerning the efficacy of the model.
