Spatial decision tree model for garlic land suitability evaluation

Andi Nurkholis, Imas Sukaesih Sitanggang, Annisa Annisa, Sobir Sobir


Predicting land and weather characteristics as indicators of land suitability is very important in increasing effectiveness in food production. This study aims to evaluate the suitability of garlic land using spatial decision tree algorithm. The algorithm is the improvement of the conventional decision tree algorithm in which spatial join relation is included to grow up spatial decision tree. The spatial dataset consists of a target layer that represents garlic land suitability and ten explanatory layers that represent land and weather characteristics in the study areas of Magetan and Solok district, Indonesia. This study generated the best spatial decision trees for each study area. On the Magetan dataset, the best model has 33 rules with 94.34% accuracy and relief variable as the root node. Whereas on the Solok dataset, the best model has 66 rules with 60.29% accuracy and soil texture variable as the root node.


Garlic; Land suitability; Spatial decision tree; Spatial join relation


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