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Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
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Geo-Storylines: Integrating Maps into Storyline Visualizations.

Golina Hulstein, Vanessa Pena-Araya, Anastasia Bezerianos

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    Geo-Storylines integrate geospatial context into time-based relationship visualizations. Coordinated Views emerged as a highly effective and preferred technique for geospatial tasks, outperforming other methods.

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    Area of Science:

    • Information Visualization
    • Human-Computer Interaction
    • Geospatial Data Analysis

    Background:

    • Storyline visualizations effectively display evolving relationships over time.
    • Existing Storyline visualizations lack explicit integration of geospatial information.
    • Real-world relationships often have a spatial component, such as travel or campaign locations.

    Purpose of the Study:

    • To introduce Geo-Storylines, a novel collection of visualization designs integrating geospatial context into Storyline visualizations.
    • To explore different strategies for compositing time and space in visualizations.
    • To derive and evaluate design spaces for integrating maps into Storylines.

    Main Methods:

    • Conducted a sketching workshop with 11 participants to define a design space for map integration in Storylines.
    • Analyzed design strengths and weaknesses regarding legibility and scalability for multiple relationships.
    • Performed a controlled study with 18 participants comparing three promising techniques: Time Glyphs, Coordinated Views, and Map Glyphs across five geospatial tasks and two map complexities.
    • Collected informal feedback from data journalism domain experts.

    Main Results:

    • Identified a design space for integrating maps into Storylines through a participant workshop.
    • Coordinated Views were found to be a highly effective and preferred technique across various geospatial tasks and map complexities.
    • Performance of visualization techniques varied depending on the specific geospatial task.

    Conclusions:

    • Geo-Storylines offer enhanced methods for visualizing spatio-temporal relationships.
    • Coordinated Views provide a robust and user-preferred approach for integrating geospatial data into storyline visualizations.
    • The developed design space and evaluated techniques advance the field of information visualization for complex relational and spatial data.