Application of Primary Component Analysis in the Assessment of Land Ecological Security at Township Level

Based on having good understanding of the concept of land ecological security at town level,in the paper the indicator system of land ecological security evaluation,which included 25 indicators and was in view of economy and society safety system,resource and environment security system,was mainly established.Then the land ecological security of 10 counties of Linyi City was evaluated with primary component analysis method.The result showed that the land ecological status of 10 towns had much difference,and primary component analysis method was a feasible land ecological security evaluation method.