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PROCEEDINGS

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4.3 Point data<br />

Figure 8: Diverging colour scheme around a pivot point value of 0.75.<br />

Figures 9 and 10 show examples of thematic visual styling and contextual<br />

representation respectively for data set comprising multivariate point data, in this case the<br />

long and short term average of time series data, and the proportion of the two. Quintiles map<br />

classification was used in both cases, along with a red, yellow, green colour scheme. Figure 9<br />

shows solely the proportion of the short term to long term averages. Figure 10 shows the<br />

same information, with the proportion being included as the label, and the radius determined<br />

by the short term average. While a static radius was used for both figures, the minimum<br />

radius can be tied to zoom level to dynamically adjust radii of points as a user zooms in.<br />

FOSS4G Seoul, South Korea | September 14 th – 19 th , 2015<br />

63

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