S.A. Budiman, S. Istiqomah, I. Purnamasari, H.M. Suud, D.E. Kusbianto, S. Mechram
Sample points were usually determined based on land map units (LMU) which were carried out manually so that the level of accuracy and validation is difficult to identify, and a lot of the area size eliminated was dependent on the scale of the map to be produced. However, with a combination of GIS techniques and the K-mean cluster method, the accuracy level of sample points can be optimized and LMU could be identified to less than 0,5 ha. This research was conducted using land resource data such as geological formations (Alluvium and Coastal Deposits, Argapuro Volcanics, Bagor Formation, Lahar of Old Raung, Menuran Formation, Old Ijen volcanic rock, Raung-Pendil volcanic Rock, Ringgit Formation, Volcanic Rock of Kemuning), soil type (Lithic Hapludands, Typic Dystrudepts, Typic Eutrudepts, Typic Hapludands), slope (0-8, 8-15, 15-25%), altitude (0- 300, 300-700, 700-1,000, >1,000 m above sea level), and land use that clipped to the territorial boundaries of Bondowoso Regency, East Java Province, Indonesia on Juni 2023 to February 2024. Overlaying various land resource characteristics resulted in 5,553 Land map unit (LMU) which was then selected to become 801 LMU for use of paddy fields (irrigated and rain-fed rice fields). Cluster analysis using the K-mean cluster method was carried out from 3 to 300 clusters. The optimum cluster were shown on a cluster number of 39 with consideration of Variance Decomposition (VD) as 68.23% and the most statistically and economical analysis costs. Meanwhile, the best results were obtained at the number of clusters 276 with VD 90.075% even though it was economically inefficient. © 2025 Institute of Physics Publishing. All rights reserved.
Department of Soil Science, University of Jember, East Java-Indonesia. Kalimantan 37 Street, Jember, 68121, Indonesia; Department of Agrotechnology, University of Jember, East Java-Indonesia. Kalimantan 37 Street, Jember, 68121, Indonesia; Department of Agricultural Science, University of Jember, East Java-Indonesia. Kalimantan 37 Street, Jember, 68121, Indonesia; Department of Agricultural Engineering, Syiah Kuala University Banda Aceh, Indonesia. Tgk Hasan Krueng Kalee 3 Street, Darussalam-Banda Aceh, 23111, Indonesia
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