The Harmony client and authoring tool for Hyper-G provides numerous information management and visualisation coupled, two-and three-dimensional visualisation and navigational facilities. In particulal; the Harmony Information Landscape visualises the hierarchical structure of HYPer-G spaces upon a plane in three-dimensional space. tools [51, In particular, the Harmony Information Landscape visualises the hierarchical structure of Hyper-G (and Gopher) spaces upon a plane in three-dimensional space. Underlying metadata is used to encode visual attributes of various elements in the landscape display. This tool has now been extended to selectively superimpose hyperlink relationships in the vertical dimension orthogonal to (above and below) the plane of the hierarchy map. Utilising the third dimension in this way allows a combination of both hierarchical and hyperlink structure to be viewed together in one visualisation. Figure 1 illustrates the combined display of hierarchical structuring and hyperlink relationships for the image document entitled "Map of Graz". This image document is aThe Harmony Information Landscape has now been extended to display a combined structure and link map by selectively superimposing hyperlink relationships in the vertical dimension above and below the hierarchy map. In addition, documents returned by search queries muy be selectively "plotted" in the landscape, indicating their whereabouts in a broader context, and several sets of 3d icons are available for representing the various document types.

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As VRML becomes the standard for describing 3D scenes on the Internet, many VRML viewers are being developed with proprietary interests or for specific target systems or protocols.

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