Geospatial Visualisation

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Information about Geospatial Visualisation

Published on July 8, 2016

Author: wacton

Source: slideshare.net

1. Multiplex encoding in multi-layer visualisations Simon Walton, Oxford e-Research Centre

2. Overview • Multilayer visualisations; emphasis on cartography • Multiplexing as a possible solution

3. Map Overlays Charles Booth John Snow

4. Map Overlays - McHarg (1971) “...let us map physiographic factors so that the darker the tone, the greater the cost. Let us similarly map social values so that the darker the tone, the higher the value. Let us make the maps transparent.When these are superimposed, the least-social-cost areas are revealed by the lightest tone.”

5. The Role ofVisual Perception • Most cartographic works use ‘perception’ with more emphasis on aesthetic qualities rather than visual understanding • Who is the target of the visualisation? • Public visual communication; vs • Private visual thinking

6. Using spatial frequency

7. Dali

8. Conclusion • Layered visualisations largely an unsolved problem • A layered visualisation can be `modulated’ to assist user’s visual decomposition of each layer • Not enough emphasis on visual perception theory in cartography / GIS

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