1:5 0000 SCALE TOPOGRAPHIC MAPPING IN WEST CHINA USING SPOT 5 DATA

作     者：M.Bernard 

出 版 物：《测绘科学》 (Science of Surveying and Mapping)

年 卷 期：2008年第33卷第S2期

页      面：25-27,9页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 08[工学] 0708[理学-地球物理学] 0816[工学-测绘科学与技术] 

主　　题：mapping SPOT geometric modelling DEM accuracy 

摘      要：On the one hand,the successful launch of the SPOT 5 satellite in 2002 can be seen as a milestone for DEM extraction and mapping,because its payload includes HRS,a stereoscopic imaging instrument devoted to collection of large *** in panchromaticmode,the HRS instrument has two telescopes,one pointing forward and one aft of the *** is thus able to cover an area of 600 km×120 km in a single pass(ie 72000 km^2 stereoscopic strips).Moreover,SPOT 5 is able to collect stereoscopic triplets,through a simultaneousactivation of HRG sensors in vertical mode,which will overcome the difficulty of terrain shadow in DEM *** the extremelyprecise ancillary metadata of SPOT 5 allows accurate geometric processing with sparse ground control *** SPOT 5 stereoscopicimagery becomes one of main satellite data sources for accurate DEM extraction and quickly mapping large *** current status and coverageof stereoscopic HRS imagery as well as the metadata of SPOT 5 will be briefly *** the second hand,about 2 million km^2 in west China never has been covered by 1:50000 scale topographic maps for several *** area contains the famous Qingzang plateau with average 5000m altitude and boundless Talimu basin *** this area withtraditional methods had unimaginable difficulties and was impossible to complete at *** the high technology advancing,especially thegreat progresses in geomatics,it is the time to start to map the area with new geo-information *** in 2006,China decided to initiatea large project,named 1:50000 scale topographic mapping of west China(*** China topographic mapping project),in order to getthe 1:50000 scale topographic maps(DEM,DOM and DLG)of that area within next 5 *** we know the weather is extremely atrociousand a lot of sites are out of reach in that area,mapping from aero-born and satellite remote sensing imagery with spares ground control pointswas determined to be the main so