共查询到19条相似文献,搜索用时 62 毫秒
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随着城市建设步伐加快,城市规划需要将现有的大比例尺数字地形图缩编成所需比例尺的数字地形图。本文主要介绍在MappingStar软件中利用1∶10 000数据缩编1∶50 000地形图中各层要素时综合、取舍的处理方法和原则,并对缩编过程中的注意事项进行简要说明。 相似文献
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大比例尺数字化地形图缩编技术探讨 总被引:5,自引:0,他引:5
数字化地形图的自动缩编一直是测绘行业的一大难题。在测绘行业,全要素地形图的数字化工作开展得较早,其数据结构较简单,本文以上海市1:500数字化地形图缩编1:2000地形图为例,利用AutoCAD的二次开发语言,对其数据结构中的一些特殊性加以判断及识别,编制了一套可半自动缩编的程序,大大提高了缩编效率,同时也为其以后向GIS数据格式转换迈进了一大步。 相似文献
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大比例尺数字地形图缩编方法的研究 总被引:1,自引:0,他引:1
线东升 《测绘与空间地理信息》2009,32(6):180-181
为了更好的满足城市规划和建设的需要,利用现有的大比例尺数字地形图缩编成所需比例尺的数字地形图,这一作业项目势在必行.本文叙述了将1:500和1:1 000数字地形图缩编成1:2 000数字地形图的操作过程及方法. 相似文献
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常规编绘大比例尺地形图的方法.一般是采用复照仪、感光胶片,经照相翻晒、拼贴制作骗绘底图。其成本高、工序多、周期长,尤其拼贴蓝图要求作业人员技术熟练,其操作难度较大。本文介绍的方法是利用复照复印机将图形直接复印到聚酯薄膜上;降低了成本,简化了工艺过程,易于操作,其精度较高,效益较好,具有实际应用价值。 相似文献
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本文从数字地形图的数据源、缩编、数据整理等方面分析了1:10000数字地形图缩编过程中需要注意的几个关键点。 相似文献
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CAIZhongliang WUHehai DUQingyun LIAOChujiang 《地球空间信息科学学报》2003,6(4):17-26
This paper makes a study on the interactive digital generalization, where map generalization can be divided into intellective reasoning procedure and operational procedure, which are done by human and computer, respectively. And an interactive map generalization environment for large scale topographic map is then designed and realized. This research focuses on: ① the significance of researching an interactive map generalization environment,② the features of large scale topographic map and interactive map generalization, ③ the construction of map generalization-oriented database platform. 相似文献
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This paper makes a study on the interactive digital generalization, where map generalization can be divided into intellective reasoning procedure and operational procedure, which are done by human and computer, respectively. And an interactive map generalization environment for large scale topographic map is then designed and realized. This research focuses on: ¹ the significance of researching an interactive map generalization environment, ² the features of large scale topographic map and interactive map generalization, ³ the construction of map generalization-oriented database platform. 相似文献
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车载移动激光扫描技术大比例尺测图技术分析 总被引:1,自引:0,他引:1
由于精度问题,车载移动激光扫描技术用于区域大比例尺地形图测绘尚处于探索阶段。本文重点研究了提高该项技术用于大比例尺测图的外业精度质量控制方法和技术实现方法,得到了一套完善的精度控制方案和技术实现方案。最后以北京平谷一段浅山区1∶500地形图测绘任务为例,证明本文的研究突破了新技术在局部区域大比例尺地形图中应用的局限,降低了外业劳动强度,加快了测图速度,为车载LiDAR技术的进一步推广和使用提供参照。 相似文献
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在论述交互式综合环境研究的重要意义及大比例尺地形图特点的基础上,采用人机协同的地图缩编方式,将复杂的地图综合过程分解,合理地进行人机分工,设计与实现了大比例尺地形图交互式综合系统的数据库管理平台。实践证明,利用该数据库平台建立的综合系统适用于人机协同的作业方式,可以顺利地、交互式地完成地图缩编工作,减轻了作业强度,提高了作业精度。 相似文献
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Multiple constraints for schematic road network map cartographic design are analyzed and summarized. Based on this, a set of quantitative criteria are set up and a new road network generalization method including progressive selection and displacement is proposed. Furthermore, topological checking methods for road networks are researched. Based on these constraints, the points in a road network are classified, and a satisfactory and effective schematic map is designed in a concrete experiment while maintaining topological consistency of the road network between the original and the schematic map. 相似文献
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Multiple constraints for schematic road network map cartographic design are analyzed and summarized. Based on this, a set of quantitative criteria are set up and a new road network generalization method including progressive selection and displacement is proposed. Furthermore, topological checking methods for road networks are researched. Based on these constraints, the points in a road network are classified, and a satisfactory and effective schematic map is designed in a con- crete experiment while maintaining topological consistency of the road network between the original and the schematic map 相似文献
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随着测绘技术的发展,城市基本比例尺地形图更新方法也越来越多样化。文中在总结分析国内基本比例尺地形图更新情况的基础上,通过对顺德现有的地形图动态更新机制的完善,提出一种基本比例尺地形图动态联动更新机制,并经实用证明效果良好。 相似文献