智能交通系统 4568- 地理数cb5f据文件（GDF） - GDF5.1 - 第1部分:与多个源之间共享的独立于应用的地图数4568cb5f据

[中文适用范围]： 本文件规定了智能交通系统（ITS）应用程序和服务的地理数据库的概念和逻辑数据模型以及物理编码格式。 它包括此类数据库的潜在内容的规范（特征、属性和关系的数据字典）、如何表示这些内容的规范以及如何指定有关数据库本身的相关信息（元数据）。 本文件的重点是智能交通系统应用和服务，并强调道路和道路相关信息。 然而，ITS 应用程序和服务还需要除道路和道路相关信息之外的信息。 示例 1 ITS 应用程序和服务需要有关寻址系统的信息，以便指定位置和/或目的地。 因此，有关一个地区的行政和邮政分区的信息至关重要。 示例2 地图显示是ITS应用和服务的重要组成部分。 为了正确显示地图，必须包含土地和水域覆盖等上下文信息。 示例3 兴趣点(POI)或服务信息是旅行者信息的关键特征。 它为最终用户 ITS 应用程序和服务增加了价值。 本文件针对的典型 ITS 应用和服务是车载或便携式导航系统、交通管理中心或与道路管理系统（包括公共交通系统）相关的服务。 概念数据模型的关注点比 ITS 应用程序和服务更广泛。 它独立于应用程序，允许将来使本文档与其他地理数据库标准保持一致。 [外文原描述]： This document specifies the conceptual and logical data model and physical encoding formats for geographic databases for Intelligent Transport Systems (ITS) applications and services. It includes a specification of potential contents of such databases (data dictionaries for Features, Attributes and Relationships), a specification of how these contents shall be represented, and of how relevant information about the database itself may be specified (metadata). The focus of this document is on ITS applications and services and it emphasizes road and road-related information. ITS applications and services, however, also require information in addition to road and road-related information. EXAMPLE 1 ITS applications and services need information about addressing systems in order to specify locations and/or destinations. Consequently, information about the administrative and postal subdivisions of an area is essential. EXAMPLE 2 Map display is an important component of ITS applications and services. For proper map display, the inclusion of contextual information such as land and water cover is essential. EXAMPLE 3 Point-of-Interest (POI) or service information is a key feature of traveller information. It adds value to end-user ITS applications and services. Typical ITS applications and services targeted by this document are in-vehicle or portable navigation systems, traffic management centres, or services linked with road management systems, including public transport systems. The Conceptual Data Model has a broader focus than ITS applications and services. It is application independent, allowing for future harmonization of this document with other geographic database standards.