智能运输系统 通过传输协议专家组第2版（TPEG2）获取交通和旅行信息 第21部分：地理定位参考（TPEG-GLR）

[中文适用范围]： 本文件确立了一种可以用于相关 TPEG 应用程序的地理定位引用（GLR）方法。本文档中定义的 GLR 类型用于定义地理定位引用（点、折线和地理区域）。该 GLR 方法旨在作为 TPEG 定位引用容器（TPEG-LRC）内部可以传输的方法之一，为那些主要提供地理位置信息的应用程序（例如天气）提供地理位置信息。考虑到其简洁性和紧凑性，GLR 规范特意被设计成能够有效地在非导航设备中使用，例如简单的 TPEG 服务（如天气信息、安全警报等）。因此，GLR 定位引用方法旨在作为与地图相关的位置引用方法的补充，重点在于对人造设施（如道路和高速公路）进行定位。由于这一原因，GLR 的范围仅限于地球表面的地理位置。 [外文原描述]： This document establishes a method of using geographic location referencing (GLR) that can be used by relevant TPEG applications. The GLR type, defined in this document, is used for defining geographic location references (points, polylines and geographical areas). The GLR method is intended to be one of the methods that can be transported inside a TPEG-Location Referencing Container (TPEG-LRC) for those TPEG applications providing information for primarily geographical locations (e.g. weather). The GLR specification is deliberately kept basic and compact, so that it can also be employed advantageously in non-navigation devices, for simple TPEG services such as weather information, safety alerts, etc. As such, the GLR location referencing method is intended to be complementary to map-related location referencing methods, where the focus is on the referencing of anthropogenic artefacts such as roads and highways. For this reason, the scope of GLR is limited to geographic locations on the Earth’s surface.