用SPOT-VGT数据制作中国2000年度土地覆盖数据  

China Land Cover 2000 Using SPOT VGT S10 Data

作　　者：徐文婷[1] 吴炳方[1] 颜长珍[1] 黄慧萍[1] 

机构地区：[1]中国科学院遥感应用研究所

出　　处：《遥感学报》2005年第2期204-214,共11页NATIONAL REMOTE SENSING BULLETIN

基　　金：中国科学院知识创新工程重要方向项目:全球农作物遥感估产研究(KZCX2-313)国际合作项目:GLC2000

摘　　要：土地覆盖是自然环境与人类活动相互作用的中心,准确而现势性强的土地覆盖数据是科学研究、资源管理和环境监测等应用的基础资料。该研究作为欧盟联合研究中心2000年全球土地覆盖计划(GLC2000)的一部分,利用2000年的1km空间分辨率的SPOT-4VGTS10数据与DEM、积温和降水等通过AHP方法合成的自然因子数据,采用FAO的土地覆盖分类系统(LCCS),通过非监督分类方法制作中国2000年的土地覆盖图。研究结果表明,在HANTS方法去云处理的基础上,结合气候分区,利用一年内每10天最大值合成的NDVI时间序列自然因子数据集可对除干旱区外大部分地区进行很好的分类,对干旱区则采用8月下旬的VGT原始数据取代NDVI数据参加分类,可达到较好的分类结果。The China land cover database with 1 km spatial resolution, a part of GLC2000 , has been developed with the 10-day composite SPOT VGT data over a period of 01 January 2000 to 31 December 2000 and the multi-spectral data of the last decade of August 2000. The multi-spectral image of the last decade of August 2000 was then used since the NDVI datasets are not sensitivie to the area with poor vegetations in northwest China. Land-cover mapping for large area will face the problem that the study area landscape greatly varies with the climate, terrain and soil, and it is a common phenomenon that the different objects have the same spectral information or the same object has different spectral information. In order to resolve this problem, the whole territory of China had been stratified into eight relative homogenous bio-climatic strata and one specific Tibet region. The stratification was carried out based on the climate condition ( above 10℃ accumulated temperature and aridity) , and then all data pre-processing, classification, interpreting and labeling processes had been carried out in each stratum, respectively. This would be good for the accuracy of the result and process of the data. In order to remove cloud contamination and interpolate the missing data masked by cloud, the Harmonic Analysis of Time Series ( HANTS) was applied to pre-process the 36 layer of VGT S10 NDVI dataset, and the ancillary metric derived from temperature, precipitation and DEM has been developed with the Analytic Hierarchy Process ( AHP) algorithm to improve the discriminating ability of VGT metrics. With the assistance of Erdas ISODATA algorithm, the classification has been carried out, and 22 types of land cover had been labeled in the whole China according to the Land Cover Classification System developed by the UN Food and Agriculture Organization (FAO) in the framework of the AFRICOVER project. The accuracy assessment was complemented by comparing with the data derived from the product with the statistic data from Chinese Statisti

关 键 词：土地覆盖 SPOT VGT 地理空间数据 制图 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]