Santa Catarina's Rural Environmental Registry System: An Analysis for Use in Public Policy.
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Abstract
The Rural Environmental Registry (CAR) is the main database for the Environmental Regularization Program (PRA), established to serve as a guide for the recovery of environmental liabilities existing on rural properties. Due to its self-declaratory nature, the CAR contains erroneous information and geometric and topological inconsistencies. The aim of this study was to assess the geometric, topological and declaratory quality of the CAR in Santa Catarina, for implementing public policies. The 2025/05/05 version of the CAR, available in the SICAR download database for public consultation, was evaluated. Geoprocessing techniques were applied to identify geometry errors, such as empty geometries, self-intersections and short segments, and topology errors, such as intra-class overlap and inter-class overlap. On average, 9% (0.04% - 23.63%) of the polygons had some kind of empty geometry, self-intersection or short segments. The results of the intra-class intersection showed an overestimation area around 10% between the property boundaries. The interclass overlap resulted in an overestimation of 20.28% of the area for the mapping classes. The CAR was implemented without the application of topological rules and without the definition of a geospatial data model for land use planning. The resulting database showed significant differences in areas of both rural property boundaries and mapping classes. The boundaries of rural properties need geometric and topological adjustments before they can be used for any kind of territorial planning. Declared use classes should not be considered for use, as they present significant geometric and topological errors, in addition to declaratory inconsistencies.
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