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关键词： 水利行业   实时监管   信息技术发展   对地观测数据   全球卫星导航系统   卫星遥感技术   北斗卫星导航系统   资源动态监测  

摘要： 综合运用时空信息技术赋能智慧水利建设,助力水利行业实现水体生态环境监测、非法采砂实时监管、水资源动态监测、大坝安全位移监管等多样的水利行业综合应用,以先进理念助力水利发展及水利行业的信息化。近年来,我国时空信息技术发展迅猛,卫星遥感技术在对地观测数据获取的能力、数量和覆盖面上也取得了跨越式发展,北斗和高分系列为代表的国家空间信息基础设施取得长足进步。2020年7月31日,习近平总书记宣布北斗三号全球卫星导航系统正式开通,标志着北斗卫星导航系统开始面向全世界提供服务。“北斗+高分”融合发展逐渐成为业界共识,并在诸多行业开始落地应用。

关键词： 倾斜摄影测量   三维建模   立体测图   立体采集  

摘要： 本文研究了利用无人机倾斜摄影测量获取影像,作业方案以内业数据处理为主,构建实景三维模型的作业流程。相对于传统的野外实测,本研究把野外实地场景搬入计算机中,能够大大地减少外业工作量,节约时间和成本。充分利用内业采集三维立体信息,减少了对天气的依赖,结合外业补测补调,从内业就能够获取足够的实地信息。本文研究将三维立体采集与立体测图进行完美结合,既提升了效率,又增加了数据的精准度,在实际生产中具有重要意义,这也必将是今后测绘地理信息产业发展的重要方向。

关键词： 无人机倾斜摄影测量技术   大比例尺地形图   矿山测量   空中三角加密测量  

摘要： 无人机倾斜摄影测量技术具有效率高,成图快和精度高的优点,广泛应用于现代化测绘领域中。以某金属矿山为例,分析该技术在矿山1/2000大比例尺地形图测量中的应用。测绘结果表明:使用无人机倾斜摄影测量技术所获控制点的三维坐标与外业全站仪测量所获的三维坐标基本一致,误差符合1/2000矿山大比例尺地形图测量的精度要求,能够满足三维矿山以及智慧化矿山建设的需求。

关键词： 北斗卫星导航系统   GNSS   变电站   工频电磁场   电磁干扰   载噪比  

摘要： 北斗卫星导航系统在电力行业的应用不可避免地面临电力复杂电磁环境的干扰问题,简要地介绍了输变电工程中工频电磁环境的基本情况,以及近几年国内外学者对变电站内工频电磁场的计算、测量和分析等取得的成果。在此基础上,通过在110 kV、500 kV和1000 kV的不同电压等级变电站内不同的位置部署观测点,进行北斗卫星导航系统定位和通信功能的测试和分析,论证了在变电站内复杂电磁环境下开展北斗导航定位及通信作业的可行性。

关键词： 城市井盖   北斗卫星导航系统   井盖状态监测   无线通信模块  

摘要： 为解决城市道路井盖管理系统的诸多问题,研究设计了基于北斗定位和GPRS通信的井盖监测系统。利用MPU6050传感器对井盖的姿态进行监测;利用BDS/GPS双模定位模块获取所监测井盖的时间和位置信息;利用GSM/GPRS无线通信模块将井盖的实时信息发送至计算机上位机和手机App。测试结果表明:该系统可以在计算机上位机和手机App终端实时获取井盖的动态信息。与基于RFID技术的井盖监测系统等传统井盖管理系统相比,基于北斗卫星导航和GPRS的井盖状态监测系统在姿态监测、定位精度及运营成本等方面具有一定的优势。

关键词： UAV   Landslide   Failure mechanism   Crack recognition   Geohazards assessment  

摘要： Unmanned Aerial Vehicle (UAV) technique has been widely utilized in geohazards assessment. In this work, the effectiveness of the UAV photogrammetry in the remote sensing and assessment of the landslide behavior is demonstrated through a case study of a landslide that occurred in Guizhou, China on 10 June 2018. The post-landslide assessments were conducted through a field investigation by a team of experts;and, two UAV photogrammetry-based surveys were carried out. On the basis of a detailed inspection of the high-resolution aerial photographs collected from the UAV photogrammetry and historical satellite imagery, subsurface strati-graphic configuration revealed from borehole explorations and the local rainfall data collected, the failure mechanism of this landslide is investigated. The occurrence of this landslide is probably attributed to the combined influence of the long-term rainfall and the engineering activities at this site. An automatic landslide cracks recognition model, which is based on the deep learning-based image recognition technique of RetinaNet, is further developed to map the cracks at the landslide site. The effectiveness of this automatic crack recognition model is validated through quantitative comparisons between the landslide cracks recognized and the field survey results. Based upon the landslide cracks identified on two different dates after this landslide event (by the field survey and automatic crack recognition model) and the subsurface displacement revealed from a drilled hole, the evolution behavior of this landslide is analyzed. The results show that the stability of this landslide was not achieved during the first slide in June 2018 and the limit of the landslide was increased much from June to November 2018. In such a situation, the elements at risk in the zones that are potentially impacted by this landslide are identified (with the aid of the UAV images collected), and a preliminary consequence assessment is conducted.

关键词： 倾斜摄影测量   大比例尺   地形图测绘   应用  

摘要： 由于传统的测绘方法依靠人工实地测量,目前,成图效率和成图质量不能满足工程的需要。本文应用倾斜摄影测量技术代替传统人工测量对大比例尺地形图进行快速制作。