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地理国情监测是测绘部门主动服务科学发展的重要职责和战略任务。本文对陕西省地理国(省)情监测试点的成果进行了系统分析,针对成果管理的需求,结合时空数据库的研究技术,提出了地理国(省)情监测时空数据库建设的技术路线,并对数据库进行了模型设计、概念设计、逻辑设计及管理平台设计。 相似文献
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5月30日,由国家基础地理信息中心承担的地理国情监测试点项目——"地理国情监测重点要素统计分析"通过国家测绘地理信息局组织的项目验收.
该项目是地理国情监测大项目启动前的技术试点,项目组利用最新版的国家1∶50000基础地理信息数据库,通过要素分析、地理空间计算,生成了地形地势本底基础数据集和地级市以上城市分布本底数据集,在此基础上分析了基础地理信息数据在地理国情监测中的适用性,试验了针对重要地理要素统计分析的技术方法及流程,并开展了相关统计分析. 相似文献
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袁宗福 《测绘与空间地理信息》2020,(3):121-123
地理国情普查在2015年完成,普查成果在"多规合一"、规划与监管、环境保护治理、自然资源调查与审计等多个领域得到广泛应用,并发挥了不可或缺的作用。但是随着应用领域的扩大,对国情普查成果的更新提出了迫切需求,需要在普查成果的基础上对其进行常态化监测。基础性地理国情监测的变化信息采集主要分为地表覆盖和地理国情要素,并对两者的采集指标、采集要求、要素分类、要素变化信息的记录做了详细规定。 相似文献
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《中国测绘》2012,(4)
1.航空航天遥感影像数据获取
统筹国内外航空航天遥感影像数据获取能力,获取满足要求的航空航天遥感影像,包括航空航天光学遥感数据、SAR数据、机载LiDAR数据等,为开展重要地理国情信息普查、重要地理国情信息全国性监测和典型地理国情信息监测提供数据.
2.重要地理国情信息普查
整合、分析现有基础地理信息数据及相关专业部门数据,开展地形地貌、地表覆盖、地理界线等重要地理国情信息普查.形成重要地理国情普查成果,构建统一时点、标准一致的地理国情本底数据库.基于地理国情本底数据库,进行地理国情普查信息统计分析与汇总,为重要地理国情信息全国性监测和典型地理国情信息监测提供基础. 相似文献
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地理国情普查中多源异构数据整合研究 总被引：2，自引：0，他引：2
地理国情普查及监测是测绘地理信息面临的又一新的重大发展战略,既是对现有基础地理信息数据的整合、提取和加工,也是与其他专业部门业务数据的融合和集成。地理国情普查主要针对我国陆地范围内的地表自然和人文要素,分为12个一级类、56个二级类、127个三级类,在数据库中共有34个层,其数据具有分类全、涉及面广的特点,不同于传统的基本比例尺地形图测绘,需要最大程度地整合、利用现有的基础地理信息数据源。为此,本文提出一种面向地理国情普查的多源异构数据整合解决方案,从其技术路线、技术实现等方面分析其实现细节。 相似文献
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就渭河流域综合整治监测试点的技术路线、基础信息获取等问题进行了描述,并对地理国情监测的技术培训问题,如何提高地表覆盖分类内业解译的正确率,如何以最好的形式展现国情监测成果提出了思考。 相似文献
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面向地理国情监测,以自然保护区监测为突破口,分析自然保护区监测内容,研究自然保护区多源异构数据整合、专题信息建模、多时态信息动态可视化等关键技术。在此基础上,以乌岩岭国家级自然保护区为例,构建保护区多层次、多尺度的基础空间数据库和专题数据库,实现保护区动态监测系统,形成动态标注、动态漫游、动态矢量等多种动态表达方式。该系统的建立为自然保护区监测和管理提供了有力的技术支撑,研究所形成的监测内容、关键技术和动态表达方式对地理国情监测具有一定的参考借鉴意义。 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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自动车辆定位导航系统中传感器的误差分析 总被引：1，自引：0，他引：1
对国界定位导航系统中几种常见的辅助传感器所产生的误差进行了分析，导出了不同传感器的误差模型。这些误差模型是估计车辆位置的扩展卡尔曼滤波器的基础，同时也为选择适当的传感器提供了理论根据。 相似文献