This research project aims to earn points to purchase the appropriate rubber water areas currently in Sakon Nakhon province plantation farmers have experienced the problem in transporting timber to supply a far distance and the cost of transport in the area, because there is still no Sakon Nakhon province buy point.Rubber from water, the study found that farmers are the transport costs are at 20884.04 baht, so the researchers had to find a spot purchase appropriate areas of timber, water, Sakon Nakhon province to reduce distance and costs of research by rubber farmers have applied the method of grouping (Cluster K-mean.Ing and grouping Method) to use the how to find the Centre of gravity (Center of Gravity Method) to calculate the points for buying water, timber, timber has been buying water points in the area, Sakon Nakhon province is equal to 2 points, with each point covers an area within a radius of 15 kilometres, representing 94.7 poechen of rubber plantations, all in the province of Sakon Nakhon.By farmers, there will be costs to transport timber from 2420.32 baht only costs and cost savings on shipping 18463.72 baht per poechen of the original expense 88.4.
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