PERBAIKAN METODE KRIGING BIASA (ORDINARY KRIGING) MELALUI PEMECAHAN MATRIKS C MENJADI BEBERAPA ANAK MATRIKS NON OVERLAP UNTUK MEWAKILI DRIFT PADA PEUBAH SPASIAL

Muhammad Nur Aidi, Indra Saufitra

Abstract


The problem in spatial assumption using drift concept often has difficulty if the assumed surface
condition is anisotropic. In anisotropic condition, it is not accurate if one corelogram (variogram) is used. In
this paper, we try to use area which will be divided into some partitions (four partition) so four variogram
models for the whole area will be arranged. Of four partitions arranged, total load values which are suitable for
assumption function so. Then the value assumption ratios on the sports which were not measured between
without and with partition were done. The assumption results showed that the assumption value was the same
as the real value in both without and with partition. However, the assumption value obtained in area which
was partitioned was better than that of without partition.
Persoalan dalam pendugaan spasial dengan menggunakan konsep drift sering kali menemui
kendala bila kondisi permukaan yang diduga bersifat anisotropik. Pada kondisi anisotropik kuranglah tepat
apabila hanya menggunakan satu model korelogram (variogram). Dalam tulisan ini dicoba area yang diteliti
dibagi menjadi beberapa partisi (4 partisi) sehingga disusun empat model variogram untuk keseluruhan area.
Dari empat partisi tersebut dicari nilai-nilai total pembobot yang layak agar fungsi penduga menjadi tak bias.
Selanjutnya dilakukan perbandingan pendugaan nilai pada titik-titik yang tidak dilakukan pengukuran antara
tanpa partisi dengan partisi. Hasil pendugaan menunjukkan bahwa nilai dugaan sama dengan nilai
sebenarnya baik yang tak dipartisi maupun yang dipartisi. Akan tetapi, nilai pendugaan yang dihasilkan dari
area yang dipartisi lebih baik dibandingkan tanpa partisi.
Keywords: Drift, Anisotropic, covarian function, Variogram, JackKnife, simulation

Article Metrics

Abstract view : 554 times
PDF - 414 times

Full Text:

PDF

Refbacks

  • There are currently no refbacks.
Shell download

Shell download sitesi

Sunucularınız da deneme ve yanılma yöntemi ile birşeyler yapmak için shell download ederek hemen sunucularınızı test etmenizi tavsiye ediyoruz