前言:这是加拿大水文气象监测站元数据标准CSA R100的第一版。CSA集团已受委托制定四项国家标准，重点关注水文气象监测站收集的数据和有关这些站的描述性数据。这些标准用于收集和公开传播水文气象监测站的元数据；b） 水文气象站的选址、设计和运行；c） 数据质量评级系统；（d）跨信息系统交换水文气象数据集。这些标准将促进加拿大各地用于收集水文气象数据和相关信息的方法、程序、技术和实践的标准化。标准化和改进的最佳实践将有助于使更多的水文气象观测更容易被更大、更好的用户获取- 消息灵通的观众。标准化元数据集的可用性，以及通过单一门户，也有助于获得统一数据、改进资产管理和优化监控网络所需的信息。CSA集团承认，本标准的制定部分是由于加拿大标准委员会的财政支持。本标准由CSA R-100气象站元数据委员会审查、评估和测试，供加拿大采用，该委员会隶属于CSA气象站技术委员会和CSA环境与商业卓越战略指导委员会，并已由技术委员会正式批准。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。范围: 本标准推广了收集水文气象站元数据和在中央存储库公开发布这些元数据的最佳实践。加拿大水文气象站的任何操作员都应遵守WIGOS元数据。收集的元数据包括有关观测变量、观测目的、台站、监测环境、观测仪器和方法、采样、数据处理和报告、数据质量、所有权、数据政策和联系人的信息。本标准还为数据用户提供元数据分类法和元数据元素的必要定义。加拿大境内任何水文气象站的元数据，以及数据可用的元数据，应上传至OSCAR/地面元数据。本标准是在不修改WMO WIGOS元数据标准（WMO 2019c）的情况下采用的，该标准是一种语义标准，规定了可记录和交换的观测元数据元素，以及WMO OSCAR/地面元数据库（WMO 2020）。

Preface:This is the first edition of CSA R100,Canadian metadata standard for hydrometeorological monitoring stations.CSA Group has been commissioned to develop four national standards focusing on data collected by hydrometeorological monitoring stations and descriptive data about the stations. The standards are fora) the collection and public dissemination of metadata for hydrometeorological monitoring stations;b) siting, design, and operations of hydrometeorological stations;c) a data quality rating system; andd) the exchange of hydrometeorological data sets across information systems.These standards will promote the standardization of methods, procedures, techniques, and practices used for collecting hydrometeorological data and related information across Canada. Standardization and improved best practices will help make more hydrometeorological observations become more easily accessible to a larger and better-informed audience. The availability of standardized sets of metadata, and through a single portal, also helps gain access to information required for homogenizing data, improving asset management, and optimizing monitoring networks.CSA Group acknowledges that the development of this Standard was made possible, in part, by the financial support of the Standards Council of Canada.This Standard was reviewed, evaluated, and tested for Canadian adoption by the CSA R-100 Weather Stations Metadata Committee, under the jurisdiction of the CSA Technical Committee on Weather Stations and the CSA Strategic Steering Committee on Environment and Business Excellence, and has been formally approved by the Technical Committee.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope:This Standard promotes best practices for collecting metadata for hydrometeorological stations and for publishing those metadata publicly at a central repository.Any operator of a hydrometeorological station located in Canada should follow the WIGOS Metadata.The metadata collected includes information about the observed variable, purpose of the observations, station, monitoring environment, instruments and methods of observation, sampling, data processing and reporting, data quality, ownership and data policy and contacts.This Standard also provides data users with the metadata taxonomy and the necessary definitions of the metadata elements. Metadata for any hydrometeorological station located in Canada, and for which the data are available, should be uploaded to the OSCAR/Surface metadata.This Standard is an adoption without modification of the WMO WIGOS Metadata Standard (WMO 2019c), a semantic standard that specifies the metadata elements for observations, that can be recorded and exchanged, and the WMO OSCAR/Surface metadatabase (WMO 2020).