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|Title:||Development of a new and open approach to dissolve polygons storing count data based on areal threshold|
|Authors:||SCHIAVINA MARCELLO; CARNEIRO FREIRE SERGIO MANUEL|
|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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