Aiming at the actuality that current WebGIS systems are mostly based on the black-box data model, the paper introduces the step-service model to access spatial data sources on the web, which is presented by Allan Doyle.
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然后,针对目前的WebGIS系统大多基于“黑箱数据模型”的现状,介绍了Allan Doyle提出的在互联网上访问空间数据源的分步骤服务模型。
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