Abstract:

Based on GIS platform,the paper analyzed the evolution of landscape pattern of urban functional land use in Huai’an city.The number of urban main functional land patches and plaque area was gradually increasing,the differences of plaque area was shrinking,and patches of urban functional land tended to compact.Both the spatial aggregation level and the connectivity level of functional land patches were gradually increased.The significant changes of fractal dimension of functional land use indicated that there were great changes in the characteristics of the shape and regularity of functional land patches.The spatial pattern characteristics of residential land patches showed“big spread,small concentration”feature.Before 2000,urban residential land patches area was smaller,the difference between different patches area was large,and the level of spatial aggregation and connectivity was high relatively.After 2000,with the increasing of residential land patch area,the extent of differences reduced, and the integrity of land improved.The distance between patches increased, but the density decreased.The land patch morphology and regularity changed greater.Before 2000,industrial land layout was dispersion,the changes in plaque area were small,and the difference of industrial land area was not significant.After 2000,industrial land patches size increased significantly,and the difference between industrial land patch area reduced obviously.Levels of integrity and concentration of industrial land patches rose rapidly,the connectivity of industrial land patches enhanced markedly,and the complexity of plaque morphology was not high.The land patches of urban public facilities showed "large scattered and small focus" feature.Before 1995,the land patches area tended to decrease,while the land density tended to increase,and the difference of patches area was insignificant.After 1995,the number and the size of land patches tended to increase,and the differences of land size were significant