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- 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. 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。
- The increase of spatial data sources and the development, applications and industrialization of spatial information technology are urging the need of spatial data sharing and exchanging. 空间信息源的不断丰富,空间信息技术的发展、应用和产业化,对空间信息共享提出了迫切的要求。
- spatial data sources 空间数据源
- Data of SWEM include spatial data and table data. 水土保持监测数据根据数据格式划分,可分为空间数据和表格数据。
- What Data Sources are Available? 上哪找资料?
- Not all data sources support query parameters. 并非所有数据源都支持查询参数。
- Data regions are bound to data sources. 数据区域绑定到数据源。
- Herbaria can provide important information about the spatial distribution of plants, and are important data sources for estimating species richness. 摘要植物标本是植物空间分布信息的重要来源,也是估算物种丰富度的主要数据资料。
- Gets a collection of data sources used by the report. 获取报表所使用的数据源集合。
- Designable data sources are bound by instance rather than by type. 可设计的数据源通过实例而不是类型进行绑定。
- Click Close to close the Secondary Data Sources dialog box. 单击“关闭”以关闭“辅助数据源”对话框。
- The system can accomplish figure data management, attribute data management and spatial data analysis. 该系统是一个集图形数据管理、属性数据管理和空间数据分析为一体的管理信息系统。
- Each container has its own mechanism for setting up data sources. 每个容器都有自己设置数据源的机制。
- A UDM is constructed over one or more physical data sources. UDM构造于一个或多个物理数据源之上。
- Digital elevation model (DEM), as the essential sources of GIS, has become an important part of a national spatial data infrastructure (SDI) in many countries, under the umbrella of digital geospatial data framework (DGDF) . 数字高程模型(Digital Elevation Model,DEM)作为GIS重要的数据来源,已成为国家空间数据基础设施(National Spatial Data Infrastructure,NSDI)的基础内容之一,并被纳入到数字化空间框架(Digital Geospatial Data Framework,DGDF)进行规模化生产。
- Not all Field properties can be used for all data sources. 并非所有的Field属性均可用于所有数据源。
- A GIS is often used to store, retrieve, and render this Earth-relative spatial data. GIS系统通常用于存储,查询,及绘制空间信息。
- Describe techniques for extracting from heterogeneous data sources. 简述异构数据源中的数据抽取技术。
- Spatio-temporal DBMS (database management system) is a DBMS which can handle the temporal data and the spatial data. 时空数据库管理系统(Spatio-Temporal DBMS)是能够同时处理时态数据和空间数据的数据库管理系统。
- Only the administrator can configure system data sources. 只有管理员有权配置系统数据源。