QuickBird影像在建立1:2000空间数据库中的应用研究

运用主成分变换(PCA)方法对QuickBird多光谱和全色遥感影像进行融合，运用目视方法评定其融合效果，利用融合后的QuickBird遥感影像进行了1：2000空间数据库建库研究。研究结果表明，主成分变换方法得到的融合影像能基本满足建立1：2000空间数据库的需要；应用融合后的影像，并参考有关辅助资料制订相应的地物判读分析依据，采用目视解译方法提取遥感影像地物信息，容差格网矢量化技术进行屏幕矢量化，建立了现代农业示范园区1：2000比例尺空间数据库。

Studay on Application of QuickBird Images in Building 1:2000 Spatial Database

As a case study of building 1:2000 scale spatial database based on Q uickBird remote sensing images, PCA arithmetics is choosen to merge QuickBird mu ltispectral and panchromatic images, and its merging effect is evaluated by visu al method.It is indicated that PCA arithmetic can meet approximately the need of building 1:2000 scale spatial database,and image merged by PCA and other refere nced documents are adopted to establish identification and analyse criterions of substances on earth surface for visual interpretation; visual interpretation is used to interpretate information of substances on earth surface,tolerance-grid-digitalization method is used for screen-digitization in building 1:2000 scal e spatial database for modern agriculture demonstration zone.