G-SIVAR: A GLOBAL SPATIAL INDICATOR BASED ON VARIOGRAM

Author(s)

Cláudia Cristina Baptista Ramos Naizer ^[1] ; David Souza Rodrigues ^[2] ; Jorge Ubirajara Pedreira Junior ^[3] ; Cira Souza Pitombo ^[4]

Affiliation

^[1] USP. Escola de Engenharia de São Carlos. Departamento de Engenharia de Transportes - Brasil

^[2] USP. Escola de Engenharia de São Carlos. Departamento de Engenharia de Transportes - Brasil

^[3] USP. Escola de Engenharia de São Carlos. Departamento de Engenharia de Transportes - Brasil

^[4] USP. Escola de Engenharia de São Carlos. Departamento de Engenharia de Transportes - Brasil

• Document type: Journal article
• Source: Bol. Ciênc. Geod.; v. 25, n. 4 2019-12-05.

Abstract

Abstract: Among the exploratory spatial data analysis tools, there are indicators of spatial association, which measure the degree of spatial dependence of analysed data and can be applied to quantitative data. Another procedure available is geostatistics, which is based on the variogram, describing quantitatively and qualitatively the spatial structure of a variable. The aim of this paper is to use the concept of the variogram to develop a global indicator of spatial association (Global Spatial Indicator Based on Variogram - G-SIVAR). The G-SIVAR indicator has a satisfactory performance for spatial association, with sensibility for anisotropy cases. Because the indicator is based on geostatistics, it is appropriate for quantitative and qualitative data. The developed indicator is derived from theoretical global variogram, providing more details of the spatial structure of the data. The G-SIVAR indicator is based on spatial dissimilarity, while traditional indexes, such as Moran’s I, are based on spatial similarity. (AU)

• FAPESP's process: 18/08755-4 - Improvement and automation for obtaining spatial association indicators based on geostatistics concepts
• Grantee: David Souza Rodrigues
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 16/07563-9 - Proposal of autologistic models for travel mode choice issues: an approach using geostatistics concepts
• Grantee: Cira Souza Pitombo
• Support Opportunities: Scholarships abroad - Research