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当今正值国民经济快速发展,科技创新不断涌现。测绘地理信息技术在人类生活中发挥了越来越大的作用,渐渐地形成了跨界发展,越来越多的行业与测绘地理信息技术建立联系。现如今,社会各行各业的发展已经离不开测绘地理信息行业的服务保障,与此同时,随着互联网时代的深度变革,云计算、大数据、人工智能、虚实融合等智能化技术的发展在测绘行业不断渗透,并与测绘地理信息技术相互融合,取得了很多创新性成果。 相似文献
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刘利 《测绘与空间地理信息》2013,(5):26-28
近年来,中国不断推进物联网技术和产业发展,各地智慧城市建设也迅速兴起。在此形势下,研究测绘地理信息在智慧中国建设中所起的作用,对于加强测绘地理信息服务保障具有重要意义。本文从地理信息资源、现代测绘手段、地理信息技术应用以及数字中国地理空间框架等四个方面,阐述了测绘地理信息在智慧中国建设中所起的重要作用。 相似文献
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信息化测绘技术在灾害应急服务领域应用探讨 总被引:1,自引:0,他引:1
提出了信息化测绘技术应用服务于防灾减灾领域的背景,阐述了信息化测绘技术体系的概念,分析了多源灾害信息资源与地理空间信息技术的紧密相关特性.以防灾减灾相关部门应用需求为基础,提出了基于信息化测绘技术重要技术构成之一--地理空间信息技术的灾害应急救助指挥地理信息服务系统架构设计、网络运行环境和硬件结构设计、数据库设计、专题空间地理信息数据设计、功能设计等.最后结合黑龙江省防灾减灾网络管理系统分项目灾害应急救助指挥地理信息服务系统设计与开发,展示了系统部分开发内容. 相似文献
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《武汉大学学报(信息科学版)》2020,(8)
随着突发事件应急处置过程的标准化、信息化程度不断提高,应急管理部门对应急测绘地理信息保障服务的主动性和适应性要求也越来越高。应急制图作为应急测绘地理信息保障服务的重要内容,也面临着提升制图速度、覆盖应急处置全过程的迫切需求。以地质灾害为例,梳理了地质灾害孕育、产生、发展到消亡全过程的地理场景模型;提出了决策者、执行者、承灾者、旁观者等4个用户类别并逐一解析了不同地理场景模型中应急制图的用户需求模型;设计了数据制图模式、模型制图模式以及专家制图模式等一套满足多场景的地质灾害专题制图方案,并以中国浙江省地质灾害中的测绘地理信息保障服务工作为例进行了验证。 相似文献
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《International Journal of Digital Earth》2013,6(1):80-87
Abstract Cultures throughout the world are associating with the rivers. People depend upon the rivers and their tributaries for food, water, transport, and many other aspects of their daily lives. Unfortunately, human beings have not calculated the accurate lengths for the great rivers even today. The lengths of the rivers are very different in popular textbooks, magazines, atlases and encyclopedias, etc. To accurately determine the lengths of the principal rivers of the world, the combination of satellite image analysis and field investigations to the source regions is proposed in this paper. The lengths of the Nile, Amazon, Yangtze, Mississippi, Yellow, Ob, Yenisey, Amur, Congo and Mekong, with lengths over or close to 5000 km, were calculated using the proposed method. The results may represent the most reliable and accurate lengths of the principal rivers of the world that are currently achievable. 相似文献
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软科学这一术语是70年代在国外提出的.然而30多年以来,它在国外不仅未得到普遍的承认,而且对软科学的定义也还未能达成大体上一致的共识.而在改革开放后的中国,出于决策科学化和民主化的需要,经过一些领导人的提倡和支持,特别是通过1986年召开的软科学座谈会及1994年召开的全国软科学工作会议,软科学事业得到了蓬勃的发展.据初步统计,截止1998年底全国共有软科学研究机构1224个,研究人员32655人,初步形成了一支较为强大的研究队伍,并取得了数百项覆盖多个领域的研究成果,为支持各级各类的决策发挥了一定的作用. 相似文献
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Tobias Nilsson Benedikt Soja Kyriakos Balidakis Maria Karbon Robert Heinkelmann Zhiguo Deng Harald Schuh 《Journal of Geodesy》2017,91(7):857-866
The very long baseline interferometry (VLBI) Intensive sessions are typically 1-h and single-baseline VLBI sessions, specifically designed to yield low-latency estimates of UT1-UTC. In this work, we investigate what accuracy is obtained from these sessions and how it can be improved. In particular, we study the modeling of the troposphere in the data analysis. The impact of including external information on the zenith wet delays (ZWD) and tropospheric gradients from GPS or numerical weather prediction models is studied. Additionally, we test estimating tropospheric gradients in the data analysis, which is normally not done. To evaluate the results, we compared the UT1-UTC values from the Intensives to those from simultaneous 24-h VLBI session. Furthermore, we calculated length of day (LOD) estimates using the UT1-UTC values from consecutive Intensives and compared these to the LOD estimated by GPS. We find that there is not much benefit in using external ZWD; however, including external information on the gradients improves the agreement with the reference data. If gradients are estimated in the data analysis, and appropriate constraints are applied, the WRMS difference w.r.t. UT1-UTC from 24-h sessions is reduced by 5% and the WRMS difference w.r.t. the LOD from GPS by up to 12%. The best agreement between Intensives and the reference time series is obtained when using both external gradients from GPS and additionally estimating gradients in the data analysis. 相似文献
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In this letter, we are trying to resolve the electromagnetic problem for the movements of the superconducting particles of the protoplanetary cloud in the magnetic field of Saturn. The force of levitation (Meissner-Ochsenfeld phenomenon) is introduced to the field of planetary science for the first time. It is shown from our theoretical analysis that rings of Saturn might have a superconducting origin, and rings might levitate within magnetic equator plane of the planet. 相似文献
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当目标面与像片平面不平行时,圆形标志的像将为椭圆,椭圆的中心与标志中心的像存在偏差。当标志较大时,此偏差将显著影响求解的精度。揭示了偏差的方向性,导出了求解偏差的方程,给出了偏差的解算步骤 相似文献