共查询到20条相似文献，搜索用时 46 毫秒
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本文结合《福州市影像地图集》设计与制作过程介绍了福州影像地图集的编制方法及关键技术,着重讨论了该图集的总体设计、表示内容和表示方法、资料选取和处理以及数码打样、计算机直接制版新工艺流程等几个主要技术问题,以期为今后高分辨率航空(遥感)影像地图集的生产在理论、方法和技术上提供参考。 相似文献
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CTP技术实际上是数字式印前电子处理技术和适当的扫描输出技术相结合的产物,能在不同媒介上直接扫描输出数字式整页版面。可供选择的媒介有3种形式：印版（直接制版）,承印物／印品（直接印刷）和样张（直接数字式彩色打样）。CTP技术可以看成是现代信息网络的一个输出窗口,通过这一窗口可实现地图的按需印刷,即在用户需要的时候印刷,在用户需要的地方印刷,印刷用户需要的东西。这种出版模式将把地图的出版、储存带入一个新天地。 相似文献
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《苏州市影像地图集》的设计与研制 总被引：12，自引：0，他引：12
影像地图集作为地图产品的一种表现形式,它是将直接复照客观现象的航空(遥感)信息与经过专业人员加工的地理信息有机地融合在一起,帮助人们科学地、客观地、系统地、直观形象地认知地理环境,正确理解地理现象的空间关系。结合《苏州市影像地图集》的设计与研制,着重讨论该图集的总体设计、表示内容和表示方法、资料的选取和处理以及数码打样、计算机直接制版新工艺流程等几个主要技术问题,为今后基于高分辨率航空(遥感)影像生产影像地图集在理论、方法和技术上提供参考。 相似文献
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薛海红 《测绘与空间地理信息》2012,35(11):178-179
在MapGIS环境下含有专色的数据源在制印一体化的实现中,色彩管理始终是一个困扰设计者的问题。在CTP技术日益成熟的今日,数码打样技术应用日益广泛,对于含有专色的色彩在数码样与印刷时效果如何达到一致性,也是制印工作者积极探索的一个方向。 相似文献
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本文介绍了基于印前拼版软件（Preps）和计算机直接制版（CTP）的地图制印工艺,并同印前拼版软件使用前的传统胶片制版（CTF）地图制印工艺进行了对比,通过对比验证了印前拼版软件（Preps）和计算机直接制版（CTP）的地图制印工艺的优势,并且将该技术广泛应用于实际生产中。 相似文献
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地图计算机直接制版（ComputertoPlate，以下简称地图CTP），又称地图脱机直接制版，它是随着近几年DTP（DeskTopPublish）桌面出版之后迅速崛起的一种新的制版方法。即经过彩色电子印前处理系统（ColourElectronicPrepressSystem）处理后的地图数据直接扫描输出至印刷版上，与传统工艺输到胶片上再进行晒版对比更为便捷。显然，地图CTP工艺将地图编绘与印刷有机地联系起来，极大地缩短了地图生产过程，省却了胶片及冲洗过程的全部化学药品，保护人类赖以生存的环境卫生。同时，由于省去软片的拷贝、修版和晒版等复制过程，这些转换… 相似文献
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浅论地图照排技术的发展趋势 总被引：2，自引：0，他引：2
计算机技术的运用极大地促进了地图照排技术的飞速发展.在简要介绍地图照排传统工艺、桌面出版系统(DTP)、直接制版技术(CTP)、数字印刷技术基础上,简述其发展趋势. 相似文献
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CTP技术在地图制印中的应用 总被引：1，自引：0，他引：1
数据化制图以及与之配套的DTP极大的促进了地图制印的发展和革新，但传统的制版（晒版）工艺并没有得到相应的提高和改善。本文简要介绍了计算机直接制版（CTP）技术和工艺以及在地图制印中的应用，并就几个重点技术设备和新工艺条件下应注意的问题作了介绍。 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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Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw. 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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地理数据库的关系模型及其实现 总被引：1，自引：0，他引：1
本文从以图论观点分析地理实体入手,系统阐述了地理数据库关系模型的设计法和过程。作者于1984年4～9月间在微型机上设计建立了关系型地理数据库的实方验系统(RGDB)。该系统采用了本文提出的关系模型,采用了可动态扩库的子库组合结构,这种结构具有灵活性和提高空间利用率的优点。RGDB含有多种功能的数据操作命令,除了具有一般检索功能外,还能进行“开窗”选取和十分“自由”的映象选取。本文对RGDB系统的主要性能和实现途径作了扼要介绍。 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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随着城市面貌日新月异,地下管网的建设也在持续推进,作为城市的地下“神经网络”,全天24 h保障城市的正常运转和发展。本文以实现城市管网管理系统的高可用、无插件、智能化为目标,采用“地上地下一体”“二三维一体”的设计理念,研究基于WebGL的三维智慧管网系统的关键技术,实现了管线设施管理的信息数字化、空间化与图形化。 相似文献