Principles of Deterministic Spatial Interpolators

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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Full text only available in PDF format.

 

 

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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