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实现耕地高效化、精细化保护管理,要从管理需求出发,有针对性地开展耕地保护动态监测监管,其中RS技术的应用尤为关键。本文梳理了现有基于RS技术的耕地保护动态监测工作模式,并以广东省为例,提出了耕地保护动态监测技术体系的优化思路,探索了优化路线,为建设更具针对性、统筹性的耕地保护动态监测监管机制提出了建议。 相似文献
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土地利用动态遥感监测已实施十余年,取得了丰硕的成果,在土地调查、耕地保护、土地监察等方面发挥了重要的作用。文中分析了土地利用动态遥感监测背景,结合实例研究了土地利用动态遥感监测技术及成果在土地利用调查、开发区监测、洪涝地质灾害评估等方面应用现状、存在问题,提出了扩大成果应用的建议。 相似文献
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2023年中央一号文件提出“加强耕地保护和用途管控,探索建立耕地种植用途管控机制,明确利用优先序,加强动态监测,有序开展试点”的要求。该文根据文件的要求,基于高分辨率遥感影像,利用地理国情监测、国土变更调查、季度遥感影像变化监测等数据,设计了基本农田保护监测技术路线和方法,改变了以往农田保护管理工作技术难度大、工作量大、效率低的状态,不仅提升了基本农田保护监管工作的效率和精准度,而且满足了耕地保护和用途管控对空间信息的需求。基本农田保护监测成果数据的应用为客观评价农田保护管理的成效提供了技术支撑和科学依据。 相似文献
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土地资源遥感动态监测技术系统 总被引:7,自引:0,他引:7
土地资源遥感动态监测技术系统沙晋明王人潮(浙江农业大学遥感与信息技术应用研究所310029)土地资源遥感动态监测主要是对土地类型、土地利用现状、土地质量等土地资源的基本状况进行监测。为实现这一目标,必须建立一套完整的技术系统,即土地资源遥感动态监测技... 相似文献
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为坚持实行最严格的耕地保护制度,坚守18亿亩耕地红线,本文介绍如何利用信息化手段建立土地整理复垦开发项目信息管理系统,实现对土地整理复垦项目的动态监管和耕地占补平衡管理,确保耕地保护任务完成。 相似文献
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城市用地现状调查是进行土地资源调查和动态监测的重要内容,本文论述了武汉市用地现状遥感综合主数字化建库的生产研究,从而证明了采用遥感技术进行城市用地现状调查具有投资省、工效高、使对信息加工处理更方便的优点。本文还从城市用地现状的变化趋2分析中说明了采用高新技术,切实保护耕地及市政府应采取相应措施是十分必要的。 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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根据残差二次型次小与最小之差进行整周模糊度确认的关键是差值的分布,只有得到了合理的差值分布才可确定合理的界值.文中基于原有的两种方法及这两种方法的不足,从理论上导出了满足条件的差值分布,并作了一定的说明. 相似文献