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Continuous cartography: generalisation for mixed-scale and mixed-space map views
Lucas Godfrey and William Mackaness
The University of Edinburgh
20th ICA Workshop on Map Generalisation and Multiple Representation
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Mobile devices: small-scale mapping, in context
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From discrete to continuous cartographic representation
Citymapper, 2017
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DC WMATA .gif
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Toward task-based generalisation for continuous cartography
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DC Test Route
1. Start >
2. Walk >
3. Metro (Orange) >
4. Metro (Red) >
5. Walk >
6. Destination
Citymapper, 2017
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Representing a single journey object
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Crossing conceptual cusps
Smoothed transition: network view, from walking to Orange metro line
Smoothed transition: polygon features, from Red metro line back to ‘street’ level
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Distinguishing the functional from the structural
Smoothed transition: network view, from walking to Orange metro line
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Example property graph
startturningPoint1
turningPoint2
turningPoint3
turningPoint4
transferPoint1
turningPoint5
transferPoint3
transferPoint2
turningPoint6
destination
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Concluding comments
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Appendix
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Example node property: angularRange
-90
a
b
0180
90