Variogram estimation is a major issue for statistical inference of spatially correlated random
variables. Most natural empirical estimators of the variogram cannot be used for this …

O objectivo principal da presente tese consiste no desenvolvimento de estimadores
robustos do variograma com boas propriedades de eficiência. O variograma é um …

Nowadays, spatial statistics plays an important role, as current technological development
helps the derivation of spatial data. Besides the traditional sources of spatial data, such as …