Johannes Liem

Johannes Liem
City, University of London · Department of Computer Science

Doctor of Philosophy

About

8
Publications
5,128
Reads
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61
Citations
Citations since 2017
3 Research Items
49 Citations
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Additional affiliations
January 2013 - August 2014
Oregon State University
Position
  • Faculty Research Assistant
Education
October 2015 - June 2020
City, University of London
Field of study
  • Computer Science, Data Visualisation, Visual Data Storytelling, Flow Maps
October 2005 - October 2012
University of Vienna
Field of study
  • Geography, Cartography & GIS

Publications

Publications (8)
Article
Full-text available
In the visualization community, it is often assumed that visual data storytelling increases memorability and engagement, making it more effective at communicating information. However, many assumptions about the efficacy of storytelling in visualization lack empirical evaluation. Contributing to an emerging body of work, we study whether selected t...
Conference Paper
Data-driven stories, widely used in journalism and scientific communication, match well with the recent focus on interpretable machine learning and AI explainability. Current technologies allow authors to break away from narratives that reflect traditional analytical workflows. To support designing such types of stories, we introduce a descriptive...
Article
Full-text available
Heritage managers are in need of dynamic spatial inventories of archaeological and cultural heritage that provide them with multipurpose tools to interactively understand information about archaeological heritage within its landscape context. Specifically, linking site information with the respective non-invasive prospection data is of increasing i...
Article
Full-text available
This article introduces interactive video maps for the web. The main component of video maps is a video stream that is areally georeferenced to a spatial reference system in the same way rectified raster orthoimages are georeferenced. The areal georeference allows for interactivity that goes beyond the play, pause, and stop functionality of video p...
Article
Full-text available
Plan oblique relief shows terrain with a side view on a two-dimensional map, resulting in visualizations where the third dimension of the terrain is more explicit than on traditional two-dimensional maps. Existing plan oblique maps are static: the angle of terrain inclination is not adjustable and the orientation of plan oblique inclination does no...
Article
Full-text available
The virtual globe is the default visualization for Digital Earth applications, but it can only show one half of the Earth. This article introduces user-adjustable, on-the-fly projection of georeferenced raster images for web mapping and web GIS applications. This technique allows users to center a map on arbitrary locations, while still seeing the...
Conference Paper
Full-text available
Rising uncertainties associated with climate change make it important to include forest ecosystem simulations into forest management planning. The output of such models can be visualized in two-dimensional time-series animation, which is often too complex to provide a spatio-temporal overview. This contribution describes a novel method, called anim...

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Projects

Project (1)
Project
My PhD research at the giCentre at City, University of London revolves around the topic of storytelling and data visualization. The goal is to investigate and reconcile techniques from narrative theory and data visualization (i.e., spatio-temporal data). I am interested to what extent narrative techniques when used in visulaization can influence a reader/user.