This study is motivated to explore and visualize the dynamic citation impact at the state and country level. We present several information visualization approaches, including cartograms and global citation maps, to understand the citation impact distribution in library and information science (LIS). We find that the citation impact in LIS is highly skewed towards North American and European co...

Given a collection of objects on a map, we seek a method of enlarging the objects over time so that these objects are still visible when the map is zoomed out. This question is brought to rigor as well-defined problems in homotopic deformation. We ask the objects, over time, to preserve topology, area-ratios and relative position. A solution is conjectured, using differential methods, leading t...

The basic idea of a cartogram is to distort a map. This distortion comes from the substitution of area for some other variable (in most examples population. The SOM constitutes a very flexible tool that has been used in many different tasks. In this article we have presented a general method for constructing density-equalizing projections or cartograms, using the basic SOM algorithm, providing ...

Map makers have for many years searched for a way to construct cartograms, maps in which the sizes of geographic regions such as countries or provinces appear in proportion to their population or some other analogous property. Such maps are invaluable for the representation of census results, election returns, disease incidence, and many other kinds of human data. Unfortunately, to scale region...

Map makers have for many years searched for a way to construct cartograms, maps in which the sizes of geographic regions such as countries or provinces appear in proportion to their population or some other analogous property. Such maps are invaluable for the representation of census results, election returns, disease incidence, and many other kinds of human data. Unfortunately, to scale region...

The paper illustrates the use of contiguous cartograms for mapping the results of a cluster analysis of attitudinal data from the national Living in Wales survey. The analysis and mapping of Welsh national data at small geographical scales is not very common and this is the first time attitudinal data from the Living in Wales survey has been mapped at levels lower than the unitary authority usi...