多源遥感影像共享平台的设计与实现

在分析不同来源遥感影像共享的基础上,提出了适合多源遥感影像的"影像波段/影像栅格+GridGeome-try+元数据"的基本数据结构。GridGeometry是遥感影像空间信息的抽象,采用GridGeometry可以避免直接对大数据量的遥感影像进行处理;采用ISO 19115元数据标准实现对遥感影像相关信息的描述,并基于XML和数据库技术实现对元数据的表达、存储、解析和处理。最后本文提出了多源遥感影像共享平台的主要体系,并在该体系的基础上实现了多种服务形式,包括:定制的共享网站和符合OGC规范的WMS、WFS和WCS服务等。不同的服务形式能够满足用户的多层次需要,而且为更灵活的服务应用提供了标准接口,在技术上为共享服务的广泛使用提供有力的保障。

Design and Realization of Multi-source Remote Sensing Images Sharing Platform

This paper introduces the "Band/Image GridGeometry Metadata" structure which is brought forward to solve the multi-source remote sensing images management and sharing problems.A GridGeometry is a feature that represents the spatial information of a satellite image,and it can help to fulfill spatial operations without loading large volume satellite image.ISO 19115 is adopted as the metadata standard for different types of satellite images,and the metadata information is formatted into XML before storing or processing.Based on techniques mentioned above,finally,we design and implement the sharing platform for multi-source remote sensing images.The platform provides two kinds of service,i.e.direct images sharing service by the website and interoperation service by a series of accessible function interfaces which are encapsulated as web services complying with WMS,WFS,WCS,etc.