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《今日国土》2014,(8):44-44
今年以来.江西省石城县围绕“强攻工业、主攻旅游、产业兴县、富民强县”发展战略.千方百计抓改革、调结构、促发展、稳增长、惠民生.全县经济运行稳中有进。1至6月份.实现生产总值15.16亿元,同比增长9.4%:社会消费品零售总额3.78亿元.同比增长13.1%:500万元以上固定资产投资2.78亿元.同比增长23.5%:财政总收入3.01亿元.同比增长20.3%.增速列全市第六位:规模以上工业增加值1.65亿元.同比增长13.44%.增速列全市第六位:城镇居民人均可支配收入9004元.同比增长10.51%:农民人均可支配收入1804元.同比增长16.75%.增速位列全市第一位。 相似文献
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总面积118.3万平方公里的内蒙古自治区共有旗、县.区(含县级市)1019个.大多旗、县、区面积大.但基础设施落后.经济总量相对较小.也正因为如此.发展潜力和空间广阔。近年来.内蒙古测绘事业局在“围绕中心,立足服务“思想指导下.密切关注旗、县经济的发展走势.与旗、县加强联系.主动提供测绘保障.促进了旗、县经济社会的发展进步。 相似文献
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京津冀地区包括北京、天津两个直辖市和河北省全域。土地面积为21.6万平方公里.占全国的2.45%:2011年.常住人口为10615万人.占全阔的7.88%:实现地区生产总值52075亿元.占全同的11.01%。 相似文献
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在日常生活中.我们随时随地都能感觉到地图的存在。还记得出门远行刚刚抵临目的地时.向你蜂拥而来兜售地图的商贩吗?出差也好.旅行也罢.即便你只是回到自己的家.无论是汽车站.火车站.甚至地铁里.总会有人不时地提醒你地图!地图! 相似文献
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1956年地簧部“大比例尺测量规范配 等高腺的盼匝规定加下麦;比 例 尺平坦地区(公尺)丘陵地区(公尺)高山地区(公尺)1:50000:20001:ID001石000石一100.50.50.252刀1.00.50.55口2.01.00.597.等高跟的位置诅差,根据各种地区的丰同坡废,不用超过下麦的钥定。〕 相似文献
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1.新建三个地图出版社;2.《地图》杂志正式刊行;3.《国家地图集》经批准公开出版;4.《非洲地图集》出版问世;5.《地图制图参考手册》编写完成;6.举办地图制图教育与培训高级讲习班;7.首次测绘南极长城站地形图;8.专题地图的编制有较大发展;9.全国大规模地名普查取得丰硕成果;10.国家测绘局建立了初具规模的国土基础信息系统。 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
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Positions and proper motions obtained from observations by the very large array (VLA) and the multi-element radio-linked interferometer
network (MERLIN) are used to establish the link of the Hipparcos Celestial Reference Frame (HCRF) to the International Celestial
Reference Frame (ICRF). The VLA and MERLIN data are apparently the latest ones published in the literature. Their mean epoch
at around 2001 is about 10 years after the epoch of the Hipparcos catalogue and, therefore, the data are considered suitable
to check the Hipparcos link established at epoch 1991.25. The parameters of the link, i.e., the angles of frame orientation
and the angular rates of frame rotation, are estimated by fitting these parameters to the differences of the optical and radio
positions and proper motions of stars common to the Hipparcos catalogue and the VLA and MERLIN data. Both the estimates of
the angles of orientation and the angular rates of rotation show nearly consistent but insignificant results for all samples
of stars treated. We conclude that not only the size of the samples of 9–15 stars is too small, but also that the accuracy
of the radio positions and, above all, of the radio proper motions is insufficient, the latter being based on early-epoch
star positions of low accuracy. The present observational data at epoch 2001 suggest that maintenance of the Hipparcos frame
is not feasible at this stage. 相似文献
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The monitoring of different crops (cultivated plots) and types of surface (bare soils, etc.) is a crucial economic and environmental issue for the management of resources and human activity. In this context, the objective of this study is to evaluate the contribution of multispectral satellite imagery (optical and radar) to land use and land cover classification.Object-oriented supervised classifications, based on a Random Forest algorithm, and majority zoning post-processing are used. This study emerges from the experiment on multi-sensor crop monitoring (MCM'10, Baup et al., 2012) conducted in 2010 on a mixed farming area in the southwest of France, near Toulouse. This experiment enabled the regular and quasi-synchronous collection of multi-sensor satellite data and in situ observations, which are used in this study. 211 plots with contrasting characteristics (different slopes, soil types, aspects, farming practices, shapes and surface areas) were monitored to represent the variability of the study area. They can be grouped into four classes of land cover: 39 grassland areas, 100 plots of wheat, 13 plots of barley, 20 plots of rapeseed, and 2 classes of bare soil: 23 plots of small roughness and 16 plots of medium roughness. Satellite radar images in the X-, C- and L-bands (HH polarization) were acquired between 14 and 18 April 2010. Optical images delivered by Formosat-2 and corresponding field data were acquired on 14 April 2010.The results show that combining images acquired in the L-band (Alos) and the optical range (Formosat-2) improves the classification performance (overall accuracy = 0.85, kappa = 0.81) compared to the use of radar or optical data alone. The results obtained for the various types of land cover show performance levels and confusions related to the phenological stage of the species studied, with the geometry of the cover, the roughness states of the surfaces, etc. Performance is also related to the wavelength and penetration depth of the signal providing the images. Thus, the results show that the quality of the classification often increases with increasing wavelength of the images used. 相似文献
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热带与亚热带拥有大量丰富的自然资源,同时也正在经历着快速的城市化进程,其资源、生态、环境等都面临着前所未有的挑战。同时,热带与亚热带地区存在着大量的自然灾害(如台风、干旱、地震等),威胁着该地区人类经济社会的可持续发展。应用遥感技术对热带与亚热带区域进行全面的监测,对于热带与亚热带区域甚至全球的可持续发展具有重要的意义。然而,由于热带与亚热带特殊的地理条件(如多云多雨等),遥感监测需要克服特殊的技术挑战。本文通过Web of Science核心数据库的7594篇研究论文进行分析,综述了热带与亚热带遥感的研究现状,分别从热带与亚热带遥感的需求、现状、挑战和机遇,通过共被引文献分析和主题词频率分析,建立共被引文献网络和主题词网络,并通过非监督机器学习进行聚类,分别识别出22个共被引文献聚类和6个主题词聚类。通过对这些共被引文献类别和主题词类别的深入分析,本文总结了:(1)热带与亚热带遥感研究的主要监测对象,包括城市地表、热带雨林、红树林、珊瑚、热带草原、生物多样性和自然灾害;(2)热带与亚热带遥感主要采用的遥感技术,包括:遥感数据的选择和使用、遥感数据分析的方法、多云多雨的问题应对以及多源遥感技术。最后,从现代遥感技术的快速发展,本文从8个方面讨论热带与亚热带遥感面临的挑战和未来发展的机遇。 相似文献
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Anko Brner Lorenz Wiest Peter Keller Ralf Reulke Rolf Richter Michael Schaepman Daniel Schlpfer 《ISPRS Journal of Photogrammetry and Remote Sensing》2001,55(5-6)
The consistent end-to-end simulation of airborne and spaceborne earth remote sensing systems is an important task, and sometimes the only way for the adaptation and optimisation of a sensor and its observation conditions, the choice and test of algorithms for data processing, error estimation and the evaluation of the capabilities of the whole sensor system.The presented software simulator SENSOR (Software Environment for the Simulation of Optical Remote sensing systems) includes a full model of the sensor hardware, the observed scene, and the atmosphere in between. The simulator consists of three parts. The first part describes the geometrical relations between scene, sun, and the remote sensing system using a ray-tracing algorithm. The second part of the simulation environment considers the radiometry. It calculates the at-sensor radiance using a pre-calculated multidimensional lookup-table taking the atmospheric influence on the radiation into account. The third part consists of an optical and an electronic sensor model for the generation of digital images. Using SENSOR for an optimisation requires the additional application of task-specific data processing algorithms.The principle of the end-to-end-simulation approach is explained, all relevant concepts of SENSOR are discussed, and first examples of its use are given. The verification of SENSOR is demonstrated. This work is closely related to the Airborne PRISM Experiment (APEX), an airborne imaging spectrometer funded by the European Space Agency. 相似文献
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以《中国土地资源调查数据集》中的专题地图制作技术为例 ,提出了基于现有 GIS与桌面出版系统功能的集成式的现代专题地图制作系统的软硬件构成和制作工艺流程 ,简要分析了该系统中有关数据接口、分析和处理等方面的特点 ,认为发展现有的 GIS系统 ,提高它的兼容性及制图出版能力 ,同时桌面出版系统借鉴 GIS技术 ,提供数据库操作功能 ,能够直接不丢失信息地读取 GIS数据将是未来的发展方向。 相似文献
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空间数据是GIS的核心内容之一,空间数据库的设计与实现直接关系到整个GIS系统的功能和效率。本文讨论了铁路工务地理信息系统中空间数据库的建立方法,实现了空间数据和属性数据的统一存储和管理,可以最大限度地达到铁路工务信息的共享,提高了铁路工务部门日常工作的信息化程度。 相似文献
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测绘实训管理平台是针对测绘类专业实训课程,以移动互联网、物联网环境为基础,构建面向移动教学环境和自主学习服务的实训教学支撑平台。平台以测绘类专业实训教学任务的规划、组织、实施和监督管理为核心,涵盖多种形式实训教学资源的集成、共享与分发过程,通过测绘仪器设备数据的实时读取,做到实训任务可管理、可量化、可评价,可以帮助任课教师持续改进实训课程教学方式,优化教学过程、提升教学效果、降低劳动强度。本文首先分析了目前高职院校实训教学的基本现状,并介绍了移动互联时代教学的技术特点,进而介绍了测绘实训管理平台的设计思路与实现方法。平台的设计和研究也对实际生产中移动互联与云技术的应用具有借鉴意义。 相似文献