本文件有助于理解ISO 19154中定义的无处不在的公共访问（UPA）上下文信息模型，以建立UPA到地理信息（GI）环境。此外，本文件说明了如何设计和实施UPA环境信息模型，以从基于地理信息系统（GIS）的空气质量信息系统提供空气质量信息服务。空气质量信息的UPA上下文信息模型只是实现UPA到GI的所有可能示例的样本，可以满足ISO 19154的要求。交叉引用:ISO 19154:2014ISO 19156:2011ISO 18158:2016ISO 19119:2016购买时可用的所有当前修订版均包含在本文件的购买中。

This document facilitates an understanding of the Ubiquitous Public Access (UPA) context information model, as defined in ISO 19154, to establish a UPA-to-Geographic Information (GI) environment. In addition, this document illustrates how the UPA context information model is designed and implemented to provide an air quality information service from a geographic information system (GIS)-based air quality information system. The UPA context information model for air quality information is only a sample of all possible examples to realize the UPA-to-GI that could satisfy the requirements of ISO 19154.Cross References:ISO 19154:2014ISO 19156:2011ISO 18158:2016ISO 19119:2016All current amendments available at time of purchase are included with the purchase of this document.