共查询到20条相似文献，搜索用时 46 毫秒
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国家基本比例尺地形图分幅和编号是国家基本比例尺地形图成果的基本要求之一,也是基础地理信息成果生产的主要依据。GB/T13989《国家基本比例尺地形图分幅和编号》规定了国家基本比例尺地形图的分幅和编号,并给出了示例以及各比例尺地形图图幅编号和图幅经纬度计算公式及示例。本次修订将标准的范围由1∶1000000～1∶5000比例尺地形图扩展到1∶1000000～1∶500比例尺地形图,增加了1∶2000、1∶1000、1∶500比例尺地形图的分幅和编号的内容及要求,特别是根据调研和意见征求情况,增加了1∶2000、1∶1000、1∶500地形图经纬度分幅和编号的有关内容,同时充分考虑了与《国家基本比例尺地图图式第1部分:1∶5001∶10001∶2000地形图图式》的附录C"地形图分幅和编号"中的相关规定的协调性,保留了1∶2000、1∶1000、1∶500地形图正方形、矩形分幅和编号的内容。 相似文献
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大比例尺地形图要素分类编码编制是大比例尺地形图数据库建库的前提,更是数字城市地理空间框架建设的重点之一.在《基础地理信息要素数据字典第1部分:1∶500、1∶1000、1∶2000基础地理信息要素数据字典》GB/T 20258.1-2007国标的基础上,结合行业应用实际需要,提出一个面向地理实体的大比例尺地形图要素分类编码方案,方案中体现了实体要素和辅助要素的区分,既满足了目前大比例尺地形图生产的实际需要,又为未来数字城市地理空间框架建设中地理实体数据生产提供了接口. 相似文献
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基于AutoCAD的大比例尺数字化地形图缩编方法探讨 总被引：13，自引：1，他引：12
大比例尺数字化地形图在城镇建设中起着重要的作用,而传统地形图缩编技术效率较低。本文以泰宁县1∶500数字化地形图缩编1∶2000地形图为例,充分利用AutoCAD平台的二次开发和共同特征选取功能,采用半自动和手动相结合的方法,大大提高了缩编效率,为大比例尺地形图缩编提供了一种新的思路。 相似文献
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以GNSS技术在矿区大比例尺地形图测绘中的应用为研究目的,在广东省始兴县铀多金属矿区进行1∶2000比例尺的地形图测绘实现。通过外业施测后进行了测量精度及质量分析。研究表明:广东省始兴县铀多金属矿GNSS测量控制网建设项目的平面及高程精度较好,平差后各项精度指标均符合国家相关规范要求,为今后大比例尺矿山测图、地质找矿、矿山开发建设和矿山环境治理等工作提供了准确、可靠的起算数据。 相似文献
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采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的
污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体
污染变化曲线,得出污染物浓度随着远离上游而增加。 相似文献
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ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200... 相似文献
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Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies. 相似文献
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GNSS系统及其技术的发展研究 总被引：3，自引：1，他引：2
阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议. 相似文献
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“4D”技术及其应用 总被引：13，自引：0，他引：13
介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。 相似文献
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《International Journal of Digital Earth》2013,6(1):66-87
Abstract Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised. 相似文献
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Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献
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李志宽 《测绘与空间地理信息》2009,32(2)
3维技术以其直观、眩目的表现力深受人们喜爱.利用3S技术和Skyline开发平台,可以构建大型企业3维地理信息系统,以满足企业设计部门和资产管理部门对基础地理信息的需求.兼容原有2维系统的总图3维信息系统,将为企业的日常管理、设计施工、分析统计、规划决策等提供更加可靠、直观、多层次、多功能的综合服务信息. 相似文献