Focus+Glue+Context Map

This site is a demo site for our fisheye views technology - Emma.

If any maps are not shown, please click reload icon. If Glue area is not shown, please drag the Focus.

How to use

  1. Hand icon : The map can be dragged by mouse.
  2. Magnifier icons ( circle / star / square) : By clicking the any point in the map, [ circle / star / square ] Focus can be displayed.
  3. Eraser icon : By clicking a Focus, the Focus can be erased.
  4. Reload icon : Click this button if the map is not shown.
  5. The Focus can be moved by mouse-dragging a center of the Focus.
  6. Sizes of the Focus and the Glue can be changed by mouse-dragging of the border of the Glue.



  1. Daisuke Yamamoto, Shotaro Ozeki, Naohisa Takahashi, Focus+Glue+Context: An Improved Fisheye Approach for Web Map Services, Proceedings of the ACM SIGSPATIAL GIS 2009, Seattle, Washington, pp.101-110, 2009.11.
  2. Naohisa Takahashi: An Elastic Map System with Cognitive Map-based Operations, International Perspectives on Maps and the Internet, Michael P. Peterson (Ed.), Lecture Notes in Geoinformation and Cartography, Springer-Verlag, pp.73-87, Feb. 12, 2008.

Other Demos

Please see also Demo Videos.