This is a survey on graph visualization and navigation techniques, as used in information visualization. Graphs appear in numerous applications such as web browsing, state--transition diagrams, and data structures. The ability to visualize and to navigate in these potentially large, abstract graphs is often a crucial part of an application. Information visualization has specific requirements, which means that this survey approaches the results of traditional graph drawing from a different perspective. Index Terms---Information visualization, graph visualization, graph drawing, navigation, focus+context, fish--eye, clustering. 1

Visual query systems (VQSs) are query systems for databases that use visual representations to depict the domain of interest and express related requests. VQSs can be seen as an evolution of query languages adopted into database management systems; they are designed to improve the effectiveness of the human-computer communication. Thus, their most important features are those that determine the nature of the human-computer dialogue. In order to survey and compare existing VQSs used for querying traditional databases, we first introduce a classification based on such features, namely the adopted visual representations and the interaction strategies. We then identify several user types and match the VQS classes against them, in order to understand which kind of system may be suitable for each kind of user. We also report usability experiments which support our claims. Finally, some of the most important open problems in the VQS area are described. 1.

Information visualizations must allow users to browse information spaces and focus quickly on items of interest. Being able to see some representation of the entire information space provides an initial gestalt overview and gives context to support browsing and search tasks. However, the limited number of pixels on the screen constrain the information bandwidth and make it difficult to completely display large information spaces. The Information Mural is a two-dimensional, reduced representation of an entire information space that fits entirely within a display window or screen. The mural creates a miniature version of the information space using visual attributes such as grayscale shading, intensity, color, and pixel size, along with anti-aliased compression techniques. Information Murals can be used as stand-alone visualizations or in global navigational views. We have built several prototypes to demonstrate the use of Information Murals in visualization applications; subject matter ...

Filmstrips and video skims are two presentation schemes for abstracting information in a digital video segment. Filmstrips present information all at once in a static form, while video skims are played and disclose information temporally. This paper discusses the evolution of the filmstrip and skim interfaces in the Informedia Digital Video Library. Filmstrips are commonly deployed as interfaces for video and image libraries, but we found initial Informedia filmstrips and skims received little use. We discuss the interface considerations motivating the redesign of filmstrips and skims to adjust their presentations dynamically based on user context and preference.

Tool integration is essential for the support of cooperative software engineering, but often restricted to the technical layer of tool implementation. The lack of a common understanding of the software process is reflected in the heterogeneity of the tools and discourages developers from using them. In this paper we propose a simple 3D model for the structure (2 dimensions) and evolution (3 rd dimension) of a software process. This model could be the underlying concept for tools that are integrated on an understanding level. A sample process navigator outlines how the model can be applied to adopt 3D visualization and virtual reality in the software engineering domain. Keywords Cooperative Software Engineering, Groupware, Virtual Reality, 3D Navigation, Heterogeneous Distributed Objects 1. Introduction The goal of a software process is the development or maintenance of a software product. This process takes place in a complex, distributed and heterogeneous world of actors and re...

This paper proposes interactive 3-D environments that are automatically designed on-the-fly based on various design rules, thereby separating layout and content. The resulting environments are compelling, customizable, and intuitive for information foraging. The interface also serves as an integrated framework for different types of rich media. The complete system for designing, constructing, and rendering the environments in real time is discussed and shown to have implications in a variety of applications including e-commerce

This paper suggests that there is a third "half" which deserves attention in its own right: sustaining the interaction.

This paper suggests that there is a third "half" which deserves attention in its own right: sustaining the interaction.

This paper describes various interfaces used in the development of search engine called Oncosifter. Cancer related diagnosis & treatment, latest medical news and publications could be accessed using this system. Different interface modules provided for user interaction -- keyword based, directory structure, hierarchical visualization interface, and personalized search are briefly discussed in the paper.

this article. . We would like to make nam easier to extend, providing better internal APIs to allow users to add custom controls to the output and to control object rendering. For example, one application would allow users to interactively control node colors to indicate application groups or characteristics