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

Figure 3

Schematic depiction of the informational sources of linking topics (red vertices) in text topic networks as a function of the textual relatedness of two texts (blue vertices) (belonging to layer L1 of a corresponding LMN—see Definition 1). Bidirectional red arcs denote arcs of the corresponding margin layers: in the present case, this concerns the relation between texts and topics (see below). Relations of thematic relatedness are inferred in this example (see Definition 3). Gray nodes and arcs indicate unconsidered sources of evidence.