SLEUTH城市扩展模型的应用与准确性评估

Accuracy Evaluation and Its Application of SLEUTH Urban Growth Model

摘要: 基于多时相TM遥感影像,利用SLEUTH模型对沈阳市1988~2004年间的城市扩展过程进行了模拟。采用ROC曲线、多分辨率误差估算和景观指数3种方法对SLEUTH模型在总体预测能力、城市扩展数量、空间位置和空间格局上的模拟准确性给予全面定量评估。结果表明,SLEUTH模型具有可信精度,对城市扩展总体趋势拟合较好,但是对城市扩展空间位置的预测和城市空间格局的表达还有待于提高。

Abstract: Based on multi-temporal TM data,the urban growth of Shenyang city from 1988 to 2004 was simulated by SLEUTH urban growth model.The multiple methods for map comparison and model validation were applied to evaluate the simulation accuracy of the SLEUTH model in Shenyang city.These multiple methods included the relative operating characteristic(ROC) curve,multiple-resolutions error budget,and landscape metrics.The results showed that SLEUTH had a credible precision on the whole,especially for the quantitative simulation of urban growth.However,the simulation accuracy for the spatial location of new development at the pixel scale and for the urban spatial pattern still needed to be improved greatly.Multi-methods research is important for the validation and evaluation of the urban CA models.