METODE SEQUENTIAL COKRIGING UNTUK ANALISIS GEOSTATISTIKA (Studi Kasus: Estimasi Kandungan Besi di daerah Morowali); SEQUENTIAL COKRIGING METHOD FOR GEOSTATISTICAL ANALYSIS (Case Study: Estimation of Iron Content in Morowali)

Sinaga, Lusiana Roulina, Abdurakhman

2015 | Skripsi | FMIPA UGM

Kriging is a computation method for estimating the value that represents a point that is unsample based on sample points that are surrounding by considering the spatial correlation that exists on the data. Sequential kriging is equivalent to the simple kriging and sequential cokriging is the expansion of sequential kriging. Sequential cokriging method is method that can be used to estimate by taking into calculate the influence of its co-variable that exist around the data. In the availability of additional data, sequential estimators improve previous estimates using a linear weighting of new data and the previous estimate of a location Case studies are used that the data content of iron contained in the area of Morowali. The estimation results of 43 points which are not sampled at coordinates abscissa, ordinate, and depth 7167.41 - 8150, 52778.56 – 54900, and 311.71 - 493.26 showed that the average content of iron is estimated 23.13% .

Kata Kunci : spatial data; geostatistics; kriging; cokriging;sequential cokriging