From Topic Networks to Distributed Cognitive Maps: Zipfian Topic Universes in the Area of Volunteered Geographic Information

<div>(a) The heatmap of thematic similarity and spatial closeness among city wikis. Red means that the wikis are thematically dissimilar and distant in space; green means that they are thematically similar and close in space. (b): the distribution of the similarities (<i>y</i>-axis) as a function of the closenesses (<i>x</i>-axis) of the different pairs of city wikis.</div>

Complexity

fig25

Figure 25

Figure 25: From Topic Networks to Distributed Cognitive Maps: Zipfian Topic Universes in the Area of Volunteered Geographic Information 