共查询到20条相似文献,搜索用时 15 毫秒
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主要针对机载LiDAR点云数据滤波方法展开了研究,通过结合具体的LiDAR应用实例,对点云滤波流程作了详细的阐述,并对滤波实验和算法性能评价作了系统的研究分析,以期能为有关方面的需要提供有益的参考和借鉴。 相似文献
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国家测绘地理信息局明确提出了"构建智慧中国、监测地理国情、壮大地信产业、建设测绘强国"的总体战略目标。而地理学研究对象的复杂性决定了它用其他成熟学科的方法很难做到精确描述、解释和预测。为了弄清楚其形成原因和演化规律,除了需要详细分析现代过程外,还必须经常性地借助历史过程的考察与分析来达到目的。这恰恰是智慧中国建设中的需要解决的问题。智慧中国建立是在地理学知识和现代遥感、测绘、地理信息系统以及计算机、卫星定位系统、互联网、云计算等技术发展之上的,同时为地理学发展创立了符合发展规律和发展要求的研究平台。 相似文献
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基于常用的制图软件ArcGIS10.5和Google Earth Pro,提出一种准确快捷地选取研究区边界并在制图中准确表达的方法.并以绘制塔里木盆地分布范围图、青海湖在Google Earth Pro上显示和新疆DEM及天山分布范围图为例,对这一方法加以详细说明,为广大科研人员在实际工作中精准地绘制研究区域提供一种方法. 相似文献
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空间定位技术及应用课程是测绘工程专业主干课程之一,该课程技术理论较深,涉及的知识面广,内容也在不断丰富之中。本文通过优化教学内容、改变教学方法、实践教学设计,开展该课程的教学研究与实践,提高了课程的教学质量,取得了较好的教学效果。 相似文献
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对我国绿洲遥感研究的审视与展望 总被引:1,自引:0,他引:1
对近年来中国绿洲研究中遥感技术应用状况,从绿洲的形成演变、绿洲水资源、绿洲土地资源利用与覆被变化、绿洲农业资源以及绿洲生态环境研究等5个方面加以总结,进而分析遥感技术在绿洲学研究中存在的主要问题,并对未来遥感技术在绿洲学研究与应用的发展方向进行了分析。 相似文献
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论述利用AutoCAD中内嵌的AutoLISP语言及AutoCAD定义型、阴影的方法,提供地籍图符号库的设计方法。 相似文献
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李克恭 《测绘与空间地理信息》2015,(11):214-216
针对甘肃基础测绘成果数据类型多样、格式多样、存储方式多样、横跨六个三度带以及甘肃西部地区控制稀少和转换图幅多的特点,对数据成果和各种类型转换方法进行对比分析,形成了甘肃基础测绘成果转换的技术路线和实现方法,并成功地实现了甘肃省基础测绘成果的整体转换,该技术路线和方法对国家测绘地理信息局组织开展的全国CGCS2000基础测绘成果转换具有一定的借鉴意义。 相似文献
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Currently,the OGC GML(Geography Markup Language) specification has been the de facto standard for GIS data sharing and exchanging and spatial interoperation.Adopting nested association expression approach of XML data,GML data documents can store both spatial information and semantic relationship information of geographical elements.To improve the efficiency of path query on GML two type information,the paper describes a holistic index method for GML data,which we call EKR+(optimized R+-tree base on Extend R... 相似文献
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Case-based reasoning is an AI technique in which the previous solutions are stored for future use. People are used to guiding themselves according to those routes that are stored in their memories and have been used by them before. It is just based on people’s preference to familiar routes, which are gained through the study of the cognitive activities. We propose to apply the intelligent method based on the case reasoning to path planning. It is impossible for a case base to store all the solutions to all the shortest paths; therefore, part of them should be stored. However, which routes should be stored and which should not be? How do we adapt the cases that have already been stored and how do we acquire the shortest route based on them? All these issues need to be explained by integrating knowledge of the network on account of case-based reasoning techniques. This paper suggests the case-based reasoning in another point. This means finding some irreplaceable links on the basis of the complete analysis of the problems space, which are called the must_be_passed link between the source and destination. Merely compute the shortest path case from those best exit/entry nodes of the grids to the irreplaceable links, and then add them into the case base storing for future use. This method is based on case-based reasoning technique and completely considers the properties of the problem space. In addition to the use of knowledge of the natural grid in the route network, this method is more efficient than existing algorithms on computing efficiency. 相似文献
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