中国四大生态地理区的划分及其界线数据研究

GIS Dataset of Boundaries among Four Geo-eco Regions of China

在亚洲、大洋洲综合生态地理区划研究基础上,根据中国综合自然地理地域分异规律和同级不同指标法(主导因素为核心的综合指标法)的基本理论,提出中国生态地理区划四大区划分的学术观点并研发了区划界线数据。中国四大生态地理区分别为东部季风生态地理区、西北干旱生态地理区、青藏高原生态地理区和南方热带岛屿生态地理区。东部季风生态地理区与西北干旱生态地理区界线划分的主要指标选取是400mm等降水量线,参考了草地与灌丛界线;东部季风生态地理区与南方热带岛屿生态地理区的界线划分主要指标选取为最冷月平均气温16℃;青藏高原生态地理区界线划分的主要指标是海拔高度4,000 m和地形坡度大于7°。在上述地区界线确定过程中,也选取了地形地貌、植被、地质条件、土壤等指标进行综合分析。区划界线数据的确定匹配了Google Earth遥感影像(米级分辨率)。国界采用国家测绘局公布的1∶100万比例尺地理信息系统数据,海岸线是以2015年Google Earth遥感影像为基础研发得到。数据结果表明,东部季风生态地理区、西北干旱生态地理区、青藏高原生态地理区和热带岛屿生态地理区分别占陆地国土面积的44.69%、24.53%、30.02%和0.76%。数据以.shp和.kmz两种格式存储,共包括15个数据文件,数据量为52.9 MB;压缩为2个文件,压缩后数据量为37.3 MB。

Based on geo-ecosystem data analysis in Asia-Oceanic region,four geo-ecosystem regions of China were identified according to the theory of comprehensive geography,critical indexes method and multiple geographical data,they are:Eastern monsoon region,Northwest arid and semi-arid region,Qinghai-Tibetan Plateau region and Southern tropic islands region.The vector data in both.kmz and.shp formats in meters resolution was developed.The dataset indicated that the most large region in Eastern monsoon region(account for 44.69%of total area of China),the Northwest arid and semi-arid region,the Qinghai-Tibetan Plateau region and the Southern tropic islands region follow with 24.53%,30.02%and 0.76%of the total land of China.The dataset is consisted of 15 data files with the data size of 52.9 MB at.shp and.kmz data formats,which was compressed into 2 data files with the data size of 37.3 MB.