This issuance system possesses multi-functions of map-layer control and management, data searching and retrieval, and spatial analysis operation of basic information.
该网络发布系统具有图层控制与管理、数据查询检索、基本信息的空间分析操作功能。
This system provide forest resources spatial and attribute data management, straightforward information browsing and retrieval services for forestry sector.
该系统实现了对森林资源空间与属性数据的基础管理，为林业部门提供简单直接的信息浏览与检索服务。
Effective data source selection strategy is one of the important issues of the spatial information retrieval.
合理高效的数据源选择策略是提高空间信息检索系统效率的重要因素之一。
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