共查询到20条相似文献，搜索用时 46 毫秒
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基于FME的城市GIS基础空间数据格式转换 总被引：10，自引：0，他引：10
FMEUniversalTranslator功能强大,转换速度快,在转换过程中能同时完成多种空间信息的操作,并且能将多要素同时转换。在介绍城市GIS基础空间数据的主要组成、数据共享问题以及如何建设基础空间数据的基础上,分析应用常规方法进行数据格式转换的不足之处,并针对城市GIS应用对多种数据格式快速转换的需求,介绍FMEUniversalTranslator在不同数据格式转换中的应用。采用FME提供的GIS平台访问数据插件,结合实例,介绍应用FME进行数据转换的步骤和实现方法,并分析应用效果。 相似文献
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通过对CASS,ArcGIS数据格式的分析,结合FME强大的数据转换功能,本文提出了一种利用FME技术实现地形图数据主流的CASS DWG格式经由SHP格式转换为符合国标规定的ArcGIS Geodatabase(MDB)数据的一种新方法,实现了地理数据批量、无损、高效地转换入库操作。以某市的地形图数据为数据源,进行实验验证,结果表明利用FME的Joiner函数模型可同步实现数据的格式转换、地理要素编码转换、地理要素的重分类与分层、投影变换等操作,可有效解决制约地理空间数据集成与共享的多源数据格式不统一的技术难题。 相似文献
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利用FME工具语义转换功能可以实现数百种数据格式的互换,几乎可以避免属性信息的丢失,这是一般GIS软件无法做到的。介绍FME Workbench、FME函数以及其语义转换功能,根据目前空间数据处理面临的普遍问题,利用ArcGIS内置的FME Workbench组件,通过实例实现CAD和shp格式数据的互操作,以及shp到CAD格式的无损转换,为空间数据的处理提供一个很好的 相似文献
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农村地籍调查数据来源广泛,数据量大,数据格式复杂。传统地籍数据库建设往往需要大量的人力投入,自动化程度不高。本文全面梳理了空间数据建库的流程,针对地籍调查数据入库工作开展了研究,并重点基于FME从数据融合和数据分层入库两个方面研究了自动化建库方法,最后,在惠阳农村地籍调查数据处理及建库项目中进行了应用,对比传统方法,本文提出的基于FME的数据入库方法具有较强的适用性和较高的时效性,并为后续开展规模化的应用提供了支撑。 相似文献
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对地籍图坐标转换与数据建库技术的工作流程进行了剖析,依托广东某区域的农村地籍测绘数据处理及建库项目构建了在地籍图接边、坐标转换、质量检查、数据入库时的FME(feature mainpulate engine)流程模板,能够批量化、自动化地一次性完成数据处理,并在实际项目中进行了试验.结果表明,该模板化方法处理效率更高... 相似文献
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在加快推动超大规模城市精细化管理建设背景下,结合上海市持续优化精细化治理实践经验,现有地名地址库存在数据来源广、更新周期长、手动处理流程复杂等问题,通过研究现有地名地址库数据处理入库更新升级方案,利用GeoScene ArcPy空间函数库构建地名地址库模型处理工具箱实现智能化数据处理,结合空间数据转换处理系统（FME）强大空间数据加载、转换能力,实现地名地址库数据快速智能化处理、入库和更新。实践证明,基于ArcPy和FME技术可快速构建地名地址数据模型处理工具箱和入库更新模板,实现地名地址数据库智能化更新。 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