João Negreiros[1], Marco Painho1, Fernando Aguilar[2]
c8057@isegi.unl.pt, painho@isegi.unl.pt, faguilar@aul.es
(recebido em 8 de Abril de 2008; aceite em 2 de Maio de 2008)
Resumo: A interpolação espacial é o processo de prever o valor de atributos em locais não amostrados a partir de medições realizadas em localizações diversas de uma determinada região [Burrough, McDonnell, 1998]. Rever e comparar os interpoladores determinísticos espaciais usados em Sistemas de Informação Geográficos (GIS) como a B-Spline, Fourier, TIN, IDW e as superfícies de tendência polinomiais é o objectivo principal deste artigo curto. Alguns aspectos técnicos computacionais são igualmente examinados.
Palavras-chave: Interpolação espacial, TIN, Superfícies de tendência global, Fourier, B-Spline.
]]> Abstract: Spatial interpolation is the process of predicting the value of attributes at unsampling sites from measurements made at point locations within the same area or region [Burrough, McDonnell, 1998]. To review and to compare spatial deterministic interpolators used in Geographical Information Systems (GIS) such as B-Splines, Fourier, TIN, IDW and polynomial trend surfaces is the main goal of this short article. Some computational technical aspects are examined, as well.
Keywords: Spatial interpolation, TIN, Global polynomial trend, Fourier, B-Splines.
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]]> [1] ISEGI-UNL, Campus de Campolide, Lisboa, Portugal; http://www.isegi.unl.pt
[2] Universidad de Almeria, La Canãda de San Urbano, Almeria, Spain; http://www.ual.es
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