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. 2018 Oct 4;13(10):e0204574. doi: 10.1371/journal.pone.0204574

Fig 1. Example of divergence between the definition of municipality by IBGE and the functional city definition.

Fig 1

The municipality of Oriximina, located in the North of Brazil, has a geopolitical area greater than Portugal, but it has only around 50,000 inhabitants scattered around in indigenous areas and a very small urban center. The minimum density cut-offs method proposed here take off municipalities like this one from the analysis, avoiding biases that could disrupt the results. Based on data from Brazilian Ministry of Ministry of Environment [34] and OSM [32].