Abstract:In the area of Geosciences it is intuitive to think of spatial correlation as a phenomenon under study, and Geostatistics has tools to identify and represent the behavior of such dependency. The spatial analysis of the results of an inspection of the quality of a cartographic product is generally not addressed in the standards, which are restricted to descriptive and tabular findings, based on the assumption of the Classical Statistics of independence of observed data. At the Brazilian National Infrastructure of Spatial Data (INDE), various cartographic products should be made available to society, along with their metadata. This paper proposes a methodology for quality inspection based on international standards and on the Cartographic Accuracy Standard (PEC), using geostatistical methods and spatial representation of this benchmarking, through positional quality maps. The method of evaluating the quality of data was applied to Brazil's Continual Cartographic Base, at the scale of 1:250000 -BC250, with a focus on absolute positional accuracy. The quality map generated presented regionalizations of the planimetric error confirmed by the producer team of the referred cartographic base of IBGE. Such information can help users and producers to understand the spatial behavior of cartographic product quality in study.
Geoestatística aplicada na geração de modelos numéricos de elevação Resumo: Estudos de características do relevo, geomorfológicos, os quais abarcam amplas áreas do conhecimento, tais como agrimensura, cartografia, mineração, hidrologia, geologia, sensoriamento remoto, ciência do solo, ecologia e ciências ambientais, utilizam-se os modelos digitais de elevação (MDEs), baseado em processos numéricos essa é a técnica mais comum de derivação de atributos morfológicos de relevo em ambiente digital e tem contribuído na potencialização (rapidez e precisão) da obtenção de dados e informação. Diante disso, tem-se como objetivo avaliar se através do método de krigagem é possível melhorar a resolução espacial do SRTM referente a folha folha SF-23-X-B, que contempla a cidade e Viçosa dos valores de altitude, originalmente espaçados em 90 metros. Foram utilizados os softwares Quantum GIS 1.7, Microsoft® Office Excel 2007 e GS+ 7.0.
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