摘要
Abstract
[Objective]Taking the K area in the northwest region as an example,which includes multiple land use types,GIS and Markov models are used to analyze the characteristics of land use structure changes in this area.[Method]By using GIS technology to determine the testing area of land in the K area,calculate the dynamic degree of comprehensive land use,and combine the changes in dynamic degree to measure the land use offset in the K area according to the scanning nodes set by GIS.Guided by the offset,calculate the maximum plaque in-dex,use Markov model and maximum plaque index to predict the global plaque position,and further calibrate the plaque location.Based on the degree of aggregation(or dispersion)of spatial distribution,the evolutionary analysis method is used at the location of land patch calibra-tion to summarize the characteristics of land structure changes in the K area,determine the likelihood proximity value,and analyze the classifi-cation degree and complexity of structural changes of the land parcels.[Result]The contribution rate of changes in water bodies and other land types within 90 days in K area is relatively high,all exceeding 12%,the change intensity of paddy fields,dry land,forest land,grassland,water bodies,towns,other land types in area can reach 1.8%and a balance degree of 0.75.[Conclusion]The land structure in K area is gradually becoming regionally balanced,highlighting the hierarchical and balanced nature of structural changes;the stability of land structure changes in each block has been improved,and the overall structural changes show a positive relationship,with good utilization effects.关键词
GIS技术/Markov模型/土地利用结构/变化特征Key words
GIS technology/Markov model/Land use structure/Change characteristics分类
管理科学
