FITING SEMIVARIOGRAM DENGAN LINEAR PROGRAMMING (LP), ORDINARY LEAST SQUARES (OLS) DAN WEIGHTED LEAST SQUARES (WLS)

Faisal, Fachri (2016) FITING SEMIVARIOGRAM DENGAN LINEAR PROGRAMMING (LP), ORDINARY LEAST SQUARES (OLS) DAN WEIGHTED LEAST SQUARES (WLS). In: SEMIRATA 2016 Bidang MIPA BKS-PTN Wilayah Barat, 22-24 Mei 2016, Graha Sriwijaya, Universitas Sriwijaya.

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Abstract

One of the basic tools in the geostatistics is the semivariogram which explains the variability of data at a specific distance and direction. The purpose of this study was to obtain a theoretical semivariogram models based on a robust experimental semivariogram by using LP, OLS and WLS methods. In data processing and fitting semivariogram using Microsoft Visual Basic and the Program R. From the results of a case study using the LP method, OLS and WLS method, the spherical semivariogram model is obtained with the sill as follows: 40.62 (g/t)2 ; 38.44 (g/t)2 ; 47.80 (g/t)2 and range as follows: 884.29 m ; 921.87 m ; 1139.96 m. As for the exponential semivariogram models sill obtained as follows: 78.60 (g/t)2 ; 37.23 (g/t)2 ; 50.72 (g/t)2 and range as follows: 216.91 m ; 811.76 m ; 1608.82 m

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