1.1 本实践涵盖了与土地搜索地图一起使用的符号和标记，以显示资源、搜索范围、状态和结果。 1.2 这些符号和标记的操作使用、它们所代表的资源和地图不包括在本实践中。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 底图和覆盖图用于通过图形化跟踪进度、资源分配和结果来管理搜索。标准符号和标记允许一个人目测地图以获得搜索状态，而无需简要介绍或阅读搜索文件。 4.2 覆盖用于搜索过程中可能更改的符号，覆盖其他符号或底图特征，以防止标记底图，并避免一次标记过多。 4.3 符号和颜色的选择应与《事故指挥系统现场操作指南》中定义的符号兼容- 这种兼容性要么是精确的（例如，事件指挥所），要么是功能性的（例如，搜索区域边界）。

1.1 This practice covers the symbols and markings to be used with land search maps to show resources, search coverage, status, and results. 1.2 Operational usage of these symbols and markings, the resources they represent, and maps are not included in this practice. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 The base map and overlays are used in managing a search by graphically tracking progress, resource allocation, and results. Standard symbols and markings allow a person to visually scan the map to obtain the status of the search without the need for a briefing or reading search documents. 4.2 Overlays are used for symbols which are likely to change during the search, that will cover other symbols or base map features, to prevent marking the base map, and to avoid too many markings at one time. 4.3 The symbols and colors have been chosen to be compatible with the symbols defined in Incident Command System Field Operations Guide ICS-420. This compatibility is either exact (for example, incident command post) or functional (for example, search area boundaries).