SensorThings API (STA)

The SensorThings API (STA) is an application programming interface developed by the Open Geospatial Consortium (OGC) for the management of sensors and actuators on the Internet of the thing (IoT). While IoT network protocols such as MQTT and HTTP address the ability of various IoT systems to exchange information, SensorThings API addresses the ability of various IoT systems to use and understand the information exchanged. The SensorThings API offers an open, spatial and uniform way to connect IoT devices, data and applications over the Internet. Within the scope of this interface, two main functions can be assigned, which can be divided into the so-called “sensing part” and “tasking part”. The acquisition part (“sensing part”) offers a standard methodology for managing or retrieving observations and metadata from heterogeneous IoT sensor systems. With the interface available here, the first part of the STA (“Tasking”) is implemented. Currently, there is an instance of the SensorThings API in LGV, i.e. a sensor service (see references), which contains all sensor data. The FROST server from Fraunhofer is used for this purpose, which is a complete and open-source implementation of the OGC SensorThings API Part1:Sensing. In addition to the HTTP protocol, the MQTT protocol is also supported, providing a way to publish and subscribe to sensor data. The following actions can be performed with the interface: — Search for all sensor data provided on the FROST @-@ server — Publish and subscribe to observation values using MQTT @-@ Broker — Edit, delete and recapture sensor data (authentication required) The sensor data contained in the FROST server is the responsibility of the data holders (see contact person for the data sets). For a more detailed description of the data and data responsibility, please use the reference to the data set descriptions of the respective spatial data.SensorThings API (STA) 是开放地理空间联盟（Open Geospatial Consortium, OGC）开发的应用程序编程接口，用于物联网（Internet of Things, IoT）中的传感器与执行器管理。相较于MQTT、HTTP等可实现各类物联网系统信息交换能力的网络协议，SensorThings API的核心价值在于让各类物联网系统能够使用并理解所交换的信息。该接口提供了一种开放、具备空间特性且统一的方式，通过互联网连接物联网设备、数据与应用程序。在该接口的范畴内，可划分出两大核心功能，分别被称为“感知部分 (sensing part)”与“任务分配部分 (tasking part)”。其中数据采集部分（即“感知部分”）提供了标准化方法，用于管理或从异构物联网传感器系统中获取观测数据与元数据。借助本次提供的接口，STA的第一部分 (Tasking) 已完成实现。 目前，LGV中部署了一套SensorThings API实例，即传感器服务（详见参考文献），其存储了全部传感器数据。该实例采用弗劳恩霍夫研究院开发的FROST服务器，这是OGC SensorThings API第一部分：感知的完整开源实现。除HTTP协议外，它还支持MQTT协议，可实现传感器数据的发布与订阅。 通过本接口可执行以下操作： — 检索FROST服务器上提供的全部传感器数据 — 通过MQTT代理 (MQTT Broker) 发布与订阅观测值 — 编辑、删除及重新捕获传感器数据（需身份验证） FROST服务器中存储的传感器数据由数据持有者负责（数据集联系人详见相关信息）。 如需了解数据与数据责任的更详细说明，请参考对应空间数据的数据集描述文档。