Land use data generalization indices considering scale and land use pattern effects  

作　　者：LIU YaoLin1,2,JIAO LiMin1,2 & LIU YanFang1,2 1 School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China 2 Key Laboratory of Geographic Information System,Ministry of Education,Wuhan University,Wuhan 430079,China 

出　　处：《Science China Earth Sciences》2011年第5期694-702,共9页中国科学（地球科学英文版）

基　　金：supported by National Basic Research Program of China (Grant No. 2006CB701303);National High Technology Research and Development Program of China (Grant No. 2007AA12Z225);National Natural Science Foundation of China (Grant Nos. 40771168, 40901188);Key Laboratory of Geo-informatics of State Bureau of Surveying and Mapping (Grant No. 200906);Fundamental Research Funds for the Central Universities (Grant No. 4082002)

摘　　要：Land use generalization indices are critical for producing normative multi-scale land use databases and maps,but there is still not a national criterion for these indices in China.Previous studies on land use data generalization indices often neglect macroindices such as area proportion of land use types and map load,and also ignore landscape effects on land use generalization indices.Here we constructed an index system of land use data generalization from macro-and micro-perspectives,and examined scale and landscape effects on land use data generalization indices based on the countrywide multi-scale land use data samples.We formulated relationships between land use data generalization indices and both scale and land use pattern metrics.We defined thresholds of land use data generalization indices on scales of 1:50000,1:100000,1:250000,and 1:500000.We verified our methodology and index thresholds through generalizing a county land use database.Land use generalization indices are critical for producing normative multi-scale land use databases and maps, but there is still not a national criterion for these indices in China. Previous studies on land use data generalization indices often neglect macroindices such as area proportion of land use types and map load, and also ignore landscape effects on land use generalization indices. Here we constructed an index system of land use data generalization from macro- and micro-perspectives, and examined scale and landscape effects on land use data generalization indices based on the countrywide multi-scale land use data samples. We formulated relationships between land use data generalization indices and both scale and land use pattern metrics. We defined thresholds of land use data generalization indices on scales of 1：50000, 1 ： 100000, 1：250000, and 1：500000. We verified our methodology and index thresholds through generalizing a county land use database.

关 键 词：land use database land use database generalization generalization indices land use pattern landscape metrics 

分 类 号：P208[天文地球—地图制图学与地理信息工程]