共查询到20条相似文献，搜索用时 46 毫秒
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GIS数字产品质量抽样检验方案探讨 总被引：13，自引：0，他引：13
针对ＧＩＳ数字产品生产过程,采用“二级检查,一级验收”的检查原则,初步探讨了对数字产品衽帛样检验的基本原理和抽样方案,以ＯＣ曲线分析了传统百分比帛样方法的不足,并提出了对ＧＩＳ数字产品采用挑选型一次极限质量方案作了生产单位的二级检查抽样方案,而采用挑选型一次检后平均不合格品率上限方案作为验收单位的一级验收抽样方案。 相似文献
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众所周知，测绘产品实行二级检查一级验收制。ZBA75002-89《测绘产品检查验收规定》中提出过程检查（一查）对产品进行全面检查，规定验收的详查比例，对最终检查（二查）比例提出参照验收详查项目上报主管部门批准执行的方案。最终检查和验收都是对产品抽取比例进行检查。自省测绘产品质量监督检验站成立以来， 相似文献
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结合国家1∶50 000数字正射影像及地形要素综合判调更新成果外业检查验收工作,主要阐述了1∶50000数字正射影像及地形要素更新综合判调更新成果的外业核查验收方法,总结了外业核查验收的经验和技巧。对于生产单位的外业工作及质检部门的检查验收能起到积极的作用。 相似文献
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现从会议、抽样、内外业检查、质量评定等几方面,详细介绍了检查验收人员怎样对大比例尺地形图测绘产品进行规范验收,从而避免因验收程序不科学、不严谨甚至流于形式而给测绘市场带来的不利影响仅供广大同行参考。 相似文献
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随着近年我国数字地籍测绘的广泛开展,研究和制定数字产品的质量评定标准与验收办法已成当务之急。本文从实际操作的角度出发,归纳总结出一套切实可行的数字地籍测绘成果检查验收办法,来加强对计算机资料的检查。 相似文献
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随着测绘地理信息技术信息化程度的日益提高,数字测绘成果的外业检查迫切需要采用信息化的手段提高工作效率.本文将移动GIS技术应用于数字测绘成果检查,并对其中的关键技术进行了研究,开发了数字测绘成果巡查系统,该系统借助移动终端系统和GIS技术,方便外业进行数字化检查,有效提高了数字测绘成果外业检查的工作效率. 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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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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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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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