Title: Development of a new and open approach to dissolve polygons storing count data based on areal threshold
Authors: SCHIAVINA MARCELLOCARNEIRO FREIRE SERGIO MANUEL
Publisher: AGILE
Publication Year: 2017
JRC N°: JRC105799
ISBN: 978-90-816960-7-4
URI: https://agile-online.org/index.php/conference/proceedings/proceedings-2017
http://publications.jrc.ec.europa.eu/repository/handle/JRC105799
Type: Articles in periodicals and books
Abstract: While many analyses require smart and flexible aggregation of adjacent and complex polygons storing quantitative data, this need is not met by tools currently available. In this work we present a new approach and tool that handle minimum mapping unit, resolution mismatch between layers or spatial uncertainty problems in GISc. This tool automatically dissolves polygons below a threshold area, updating fields’ values. The toolbox allows to select polygon areal-analysis ordering (i.e. from the smallest to the biggest, vice versa or order of IDs), different dissolve rules (i.e. with smallest, greatest or maximum-border-share adjacent polygon, minimum total perimeter or maximum compactness) and different field updating (i.e. sum, mean or text concatenation). The approach is illustrated by combining raster-based LandScan population data with vector administrative units to capture the ‘ambient population’ of a set of municipalities in Naples, Italy.
JRC Directorate:Space, Security and Migration

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