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- W2912746492 abstract "A crucial step in the analysis of persistent homology is the transformation of data into an appropriate topological object (in our case, a simplicial complex). Modern packages for persistent homology often construct Vietoris–Rips or other distance-based simplicial complexes on point clouds because they are relatively easy to compute. We investigate alternative methods of constructing these complexes and the effects of making associated choices during simplicial-complex construction on the output of persistent-homology algorithms. We present two new methods for constructing simplicial complexes from two-dimensional geospatial data (such as maps). We apply these methods to a California precinct-level voting data set, demonstrating that our new constructions can capture geometric characteristics that are missed by distance-based constructions. Our new constructions can thus yield more interpretable persistence modules and barcodes for geospatial data. In particular, they are able to distinguish short-persistence features that occur only for a narrow range of distance scales (e.g., voting behaviors in densely populated cities) from short-persistence noise by incorporating information about other spatial relationships between precincts." @default.
- W2912746492 created "2019-02-21" @default.
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- W2912746492 date "2019-01-30" @default.
- W2912746492 modified "2023-09-25" @default.
- W2912746492 title "Persistent Homology of Geospatial Data: A Case Study with Voting" @default.
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- W2912746492 doi "https://doi.org/10.31235/osf.io/9mbdn" @default.
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