Abstract:

There are a lot of driving factors for landscape pattern change.Various landscape metrics have been used in the past to provide a quantitative description of landscape structure.The data of landscape pattern indices stores large number of data,how to extract useful knowledge from these data is the key to landscape pattern research.This paper introduces new method into landscape pattern research.How it can be effective selection is very important to understand driving mechanism of landscape pattern change.The rough set is an effective data processing method,we use this approach based on qualitative analysis and statistical data.The main objectives of the paper is correlation between landscape pattern and driving factors.we present a kind of reduction method that is based on attribute importance selection.Firstly,we drew the type raster format map of Jiangsu Province landscape ecology using ARCGIS analysis and calculated many landscape indices in FRAGSTATS 33.We investigated the utility of landscape pattern indices for judging the regional landscape features.Secondly,we analyzed the strong index which we choose,The number of landscape patches (NP),the average area mean (AMN),patch shape index (LSI) and aggregation index (AI)，were made to the Landscape Composite Index(LCI),a decisionmaking factor in rough set model.Thirdly,we chose 19 property factors as attribute factor for reduction,including natural factors and human factors.The main reason that natural factors were selected was according to the Statistical Yearbook.There were factors including agricultural output value (a13),the forestry (a15),Animal Husbandry (a16),fisheries (a17),and so on.We gave expression nature by factors.Human factors were the main part of attribute factors.These included primary,secondary,tertiary industries,traffic factor and population,etc.Based on model in the paper,we drew the conclusion as follows.Four main factors of 19 factors were retained key attributes.These were the total population,the secondary industry output,value of the cargo and the area of cultivated land.It showed that the method was effective.So we made correlation analysis between decisionmaking factors and LCI of Jiangsu Province.The proportion of the population share of urban population and regional ILI index was high as -095,which reflected the population in particular the urban population was the main driving factor of landscape pattern change.By correlation analysis of the road and the ILI,correlation coefficient value of -0.874 6,water transport and ILI correlation coefficient was -0.604 3,it could be concluded that land transport factor was the main driving factor of landscape pattern changed.We correlated ILI index with the national infrastructure,and  found the relevant value of -0.75,suggesting a strong correlation.In a word,the landscape pattern of regional characteristics was urbanization