共查询到19条相似文献,搜索用时 78 毫秒
1.
2.
3.
5.
6.
无人机低空航测摄影技术已成为目前最重要的测绘手段,其具有快速获取信息、地面分辨率高的优势。本文根据沙漠地形地貌的特点,选取飞前布控野外地标点的方案来进行空三解算与正射纠正,提高了影像的几何精度。利用点云地形点采集方法便捷高效的生成等高线,使最终地形图的平面和高程精度达到了1∶2000地形图的要求,为无人机在沙漠地形测量中的应用提供了一套完整的解决方案。 相似文献
7.
兰寒玉 《测绘与空间地理信息》2021,44(12):167-171
无人机技术的飞速发展,使得无人机低空摄影测量应用越来越广泛.无人机摄影测量经常存在需要解算外方位元素的问题,而光束法区域网平差能够解决该问题.本文为探究无人机低空摄影测量在大比例尺地形图中的精度要求,详解光束法区域网平差整体流程,并结合某工程项目评估无人机低空摄影测量精度,验证了低空无人机摄影测量应用于大比例尺测图的有效性. 相似文献
8.
针对传统无人机影像空中三角测量需要大量外业控制点的问题,提出通过高分辨率遥感卫星影像空间定位获取地面点坐标,并将这些地面点作为无人机影像的控制点来源,以此辅助无人机空中三角测量。在基于RPC模型的高分辨率遥感影像空间定位的基础上,采取多种控制点布设方案进行了无人机影像空中三角测量,并对比分析了各布控方案对试验精度的影响及原因。试验结果表明,在不采用外业实测控制点的情况下,只用高分辨率遥感影像空间定位得到的加密点作全局控制,平差后检查点平面精度可达到0.629 m,高程精度可达到0.823 m,如果要保证更高的空三精度,可在测区四周及中心增加少量外业实测控制点。 相似文献
9.
无人机低空遥感海洋监测应用探讨 总被引:1,自引:0,他引:1
张永年 《测绘与空间地理信息》2013,(8):143-145
结合福建省测绘院即将开展的国家863项目课题《重点海域海洋环境精细化监测集成应用示范》其中的子课题《无人机海洋监测系统》,提出了使用无人机低空遥感进行海洋监测的设想,并进行了可行性分析。 相似文献
10.
11.
12.
13.
Unmanned Aerial Vehicles (UAVs) could flexibly and efficiently observe land surface and obtain surface information at very high frequency and resolutions. In recent years, UAV technology has been greatly improved and the UAVs are increasingly applied in large amount of civilian fields. The UAV Remote Sensing (UAVRS) is a comprehensive technology composed of UAV flying aircraft, light remote sensing payload, satellite positioning device, remote-control system, communication technology and application technology. An UAVRS system is mainly composed of UAV platform, load system, ground control and data transmission system and image processing system. With the popularity of civilian UAV products and the development of UAV remote sensing payload, UAVRS also shows an explosive growth trend in various industries. However, the short battery life and limited coverage of the civilian drones are one of the key factors restricting the UAVRS applications. Besides, although the application of UAVs in various industries and fields continues to deepen, most of them are single-type applications in a certain discipline or industry. The 5G technology and wireless communication technology advance and will give rise to the UAVRS applications in terms of“networking”,“IoT”, and“real-time”, as well as cross-domain and convergence application. The modern cities are highly complex and sociotechnical. They comprise people and communities interacting with one another and with objects (e. g., roads, buildings) within a range of urban settings or contexts. It is extremely difficult to monitor and manage such complex sociotechnical systems. The monitoring and mapping of pollutions, traffic, infrastructures are great challenges in rapidly changing cities, and especially gained increasing attentions of citizens and are putting great stresses on policy makers and urban planners. Theoretical and practical efforts to create better city monitoring and management systems have a long history. In the 21st century, we recognize and conceive “creative”,“smart”and“knowledge”cities, in which the multidisciplinary Information and Information and Communication Technology (ICT) has played a vital role. The Internet of Things (IoT) promotes the development of the smart cities. However, in various urban domains, the cities equipped with a sensor-based web, or a cyber-physical information infrastructure, are far from sufficient to help policy makers or citizens to get a full understanding of the real time or near real time city conditions. To this end, due to their mobility, autonomous operation, and communication/processing capabilities, UAVs are envisaged in many smart city application domains. In this article, we describe a technology of air-ground collaborative low-altitude UAV remote sensing network system. The system composes of intelligent UAV, the UAV base station (drone-in box) and operation system. The UAV remote sensing network can provide high-frequency and real-time observations of the land surface. Based on the UAV remote sensing network, we constructed a comprehensive application for urban governance. An UAVRS network composed of eight UAV base stations was deployed in Danzao Town, Foshan City. Connected through 5G network, the UAVRS network advances the UAV inspection frequency, spatial coverage, and response time. It provides revolutionary and intelligent services for local agents and departments of water affairs, environment protection, public security, urban management, and emergency. The UAVRS network system in Danzao is expected to develop a real-world smart city paradigm that could be copied and migrated to other towns across the country. © 2023 Science Press. All rights reserved. 相似文献
14.
15.
16.
IEU-Net高分辨率遥感影像房屋建筑物提取 总被引:1,自引:0,他引:1
房屋建筑物作为人类活动的主要场所,快速准确地将其从高分辨率遥感影像中提取出来,对促进遥感信息在防灾减灾、城镇管理等方面的应用具有重要意义。本文基于深度学习,提出了高分辨率遥感影像房屋建筑物像素级精确提取方法。首先,针对样本图像边缘像素特征不足现象,以U-Net模型为基础提出IEU-Net模型,设计了全新的忽略边缘交叉熵函数IELoss并将其作为损失函数,另外添加Dropout和BN层在避免过拟合的同时提高模型训练速度和鲁棒性。其次,为解决模型特征丰富度有限的问题,引入形态学建筑物指数MBI,与遥感影像RGB波段一同参与到模型的分类过程。最后,在模型预测时与IELoss相对应采用忽略边缘预测策略从而获得最佳建筑物提取结果。实验对比分析表明:本文方法能有效克服样本边缘像素特征不足问题并抑制道路、建筑物阴影对结果的影响,提升高分辨率遥感影像中房屋建筑物的提取精度。 相似文献
17.
18.
珞珈一号01星夜光遥感设计与处理 总被引:2,自引:0,他引:2
珞珈一号01星是兼具遥感和导航的一星多用低轨维纳科学试验卫星,本文针对珞珈一号01星夜光遥感设计与处理,详细介绍了卫星平台的有效载荷及平台设计;面向科学的试验目标,制订了科学的夜光成像任务计划,实现了全国夜光一张图任务规划;提出了面向珞珈一号01星的在轨几何辐射定标模型;研制了支持WEB端及移动端访问的数据共享服务系统;针对夜光遥感数据在社会经济应用问题,提出了发展指数和未来发展指数的珞珈一号指数模型,并通过相关实验验证了模型的有效性。珞珈一号01星可为社会经济参数估算、重大事件评估、渔业监测、国家安全等领域提供技术支撑。 相似文献