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Geospatial Vis - Coggle Diagram
Geospatial Vis
Choropleth
Divide geo-region into subareas,
color each to indicate some data attribute
Problem: Modifiable Areal Unit Problem (MAUP) / Gerrymandering: unequal areas & boundary locations
Alternative district shapes create different distributions for point-based data
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if regions are same size, tile/grid maps, tilegrams,
e.g. maps of equal size squares/hexagons
problem: how is data distributed per area?
solution: make smaller area
solution: grayscale of color indicates value
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Cartogram
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e.g. population, child mortality, healthcare spending
Mosaic cartograms (block, regular):
each shape is reconstructed from a discrete tessellation of space, into squares or hexagons.
each cell represents a constant value of variable (5000 residents)
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Storytelling case study
Election
tug war: geospatial data, non-spatial context
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