MODELING DETERMINATION OF PROTECTED FOREST (HL) WITH PAIRWISE COMPARISONS WEIGHTING METHOD

摘要

Protected forest (HL) modeling by scoring method based on the Decree of Agriculture Minister No.837/Kpts/Um/11/1980 not necessarily correspond to on the ground implementation because the physical criteria used may not relevant to the criteria of local area. Therefore, it is important to model HL by another method.This study aims for modeling the determination of HL in Belitung Island with pairwise comparisons weighting method. Modeling is initiated by selecting proper input criteria of HL based on its principal function. Input criteria of modeling are slope, elevation, non-forest, water bodies and soil sensitivity layers. Further, those criteria are reclassed twice, first to suitability scale ranges of 1-9 and second to byte scale ranges of 0-255. Reclassed maps are then overlaid and weighted. Weighting is done by 15 (fifteen) consistent scenarios that the value of CR ＜ 0.1 for all of them. The results of weighting were analyzed with multi criteria evaluation (MCE) to display 15 (fifteen) modeling maps. The next step is a comparison test through all modeling result maps by comparing the value of Kappa Index Agreement (KIA) and the overall accuracy. A potential model is a such thing that has the highest value of KIA and overall accuracy. The highest value of those things found in model 4 where the values are almost perfect for KIA and 98.59 % for overall accuracy. These results indicate that modeling the determination of protected forest can be done by pairwise comparisons weighting method.