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Uncertainties Associated with Arithmetic Map Operations in GIS Anais da ABC (AABC)
YAMAMOTO,JORGE K.; KIKUDA,ANTÔNIO T.; RAMPAZZO,GUILHERME J.; LEITE,CLAUDIO B.B..
Abstract Arithmetic map operations are very common procedures used in GIS to combine raster maps resulting in a new and improved raster map. It is essential that this new map be accompanied by an assessment of uncertainty. This paper shows how we can calculate the uncertainty of the resulting map after performing some arithmetic operation. Actually, the propagation of uncertainty depends on a reliable measurement of the local accuracy and local covariance, as well. In this sense, the use of the interpolation variance is proposed because it takes into account both data configuration and data values. Taylor series expansion is used to derive the mean and variance of the function defined by an arithmetic operation. We show exact results for means and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: GIS; Interpolation variance; Map Algebra; Propagation of Uncertainty; Taylor series.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502025
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