ADS40地面数据处理的数据流分析   总被引：2，自引：0，他引：2  

邹晓亮  赵桂华  吴云东  张永生 《地理空间信息》2008,6(3):43-46

线阵CCD推扫式数字航测相机ADS40系统的引进为我国数字航空摄影测量提供了新型的数据源。对ADS40数据特点进行分析,在对数据处理软件功能测试的基础上形成了地面数据处理的数据流图,并成功用于指导相应实验测区的测绘任务。完备、正确的数据流图为ADS40作业流程的制订提供了基础和依据。  相似文献   

我国煤炭航测技术的最新发展     

赖百炼 《中国煤炭地质》2008,(11):81-83

中国煤炭地质总局航测遥感局作为我国煤炭航测技术的主要单位,承担着95％以上的煤炭矿区航测成图任务,并逐步发展成为我国集航空摄影、遥感地质、地图制印、地下管线探测、地理信息技术等全面发展的空间信息产业集团：伴随着计算机技术的发展,煤炭航测技术走过了从模拟测图到解析测图,最后发展到今天的全数字测图的历程。目前煤航已拥有和掌握了IMU／DGPS辅助航空摄影技术、SAR（合成孔径雷达）成图技术、LIDAR（机载激光扫描）技术等空间数据采集最新技术。  相似文献   

遥控飞艇数字航空摄影系统     

曹立  潘然  田挚 《测绘与空间地理信息》2005,28(5):92-93

提出快速获得航空影像并及时制作DOM、DLG的一种手段.介绍遥控飞艇数字摄影系统的工作原理,探讨存在的问题.  相似文献   

Land-Parcel Land-Use History as a Key to Site Selection for Documenting Soil Contamination Risk： a Case Study from Australian Suburbia     

YU Jie Ursula Pietrzak Jim Peterson 《地球空间信息科学学报》2005,8(4):257-261

In that orcharding in early-to-mid twentieth century southeastern Australia involved use of certain heavy metal and As compounds in regular pest-control spray procedures, some interest attaches to the possibility that these landparcels are underlain by soils with above-background Cu, Pb and As levels. Interpreta- tion of Land-cover changes allowed land parcels previously occupied by orchards to be identified in the 1950s through time-series air-photos. A comparison of soil analysis results referring to soil samples from control sites, and from land parcels formerly occupied by orchardists, shows that contamination （above-background） levels of cations in the pesticides can be found in the top 6 cm of former orchard soils. It is clear that digital spatial data handling and culturally-informed air photo interpretation has a place in soil contamination studies, land-use planning （with particular reference to re-development） and in administration of public health.  相似文献   

航空影像分割的最小二乘支持向量机方法   总被引：5，自引：0，他引：5  

徐芳  梅文胜  张志华 《武汉大学学报(信息科学版)》2005,30(8):694-698

将最小支持向量机LS-SVM用于航空影像的分割,讨论了不同核函数对分割结果的影响和稀疏化处理对决策函数的影响。试验表明了LS-SVM方法用于航空影像分割的可行性。  相似文献   

基于Kiwi数据格式的地图显示研究   总被引：7，自引：1，他引：7  

徐敬海  李清泉  宋莺  郑年波 《武汉大学学报(信息科学版)》2005,30(10):866-869

在分析Kiwi显示数据存储组织方法的基础上,研究了Kiwi显示数据在内存中的动态组织,改进了地图显示的二级缓存方法,提出了地图显示的双缓冲池策略。试验结果表明,本文研究的数据动态组织方法和地图显示策略提高了地图显示速度。  相似文献   

车牌识别仪在车辆管理系统中的应用     

尹明  金群峰 《测绘科学与工程》2005,25(4):36-39

本文通过对用户需求的分析，提出了一套具有车牌识别功能的小区车辆管理解决方案。其中对车牌识别仪在小区车辆管理系统中的应用、车牌识别技术及该设计方案中应用系统的功能做了较详细的介绍。  相似文献   

Exploration and discovery in Yellowstone Lake: results from high-resolution sonar imaging, seismic reflection profiling, and submersible studies     

L. A. Morgan  W. C. Shanks  III  D. A. Lovalvo  S. Y. Johnson  W. J. Stephenson  K. L. Pierce  S. S. Harlan  C. A. Finn  G. Lee  M. Webring  B. Schulze  J. Dühn  R. Sweeney  L. Balistrieri 《Journal of Volcanology and Geothermal Research》2003,122(3-4):221-242

‘No portion of the American continent is perhaps so rich in wonders as the Yellow Stone’ (F.V. Hayden, September 2, 1874)Discoveries from multi-beam sonar mapping and seismic reflection surveys of the northern, central, and West Thumb basins of Yellowstone Lake provide new insight into the extent of post-collapse volcanism and active hydrothermal processes occurring in a large lake environment above a large magma chamber. Yellowstone Lake has an irregular bottom covered with dozens of features directly related to hydrothermal, tectonic, volcanic, and sedimentary processes. Detailed bathymetric, seismic reflection, and magnetic evidence reveals that rhyolitic lava flows underlie much of Yellowstone Lake and exert fundamental control on lake bathymetry and localization of hydrothermal activity. Many previously unknown features have been identified and include over 250 hydrothermal vents, several very large (>500 m diameter) hydrothermal explosion craters, many small hydrothermal vent craters (1–200 m diameter), domed lacustrine sediments related to hydrothermal activity, elongate fissures cutting post-glacial sediments, siliceous hydrothermal spire structures, sublacustrine landslide deposits, submerged former shorelines, and a recently active graben. Sampling and observations with a submersible remotely operated vehicle confirm and extend our understanding of the identified features. Faults, fissures, hydrothermally inflated domal structures, hydrothermal explosion craters, and sublacustrine landslides constitute potentially significant geologic hazards. Toxic elements derived from hydrothermal processes also may significantly affect the Yellowstone ecosystem.  相似文献   

Weather as a Chronic Hazard for Road Transportation in Canadian Cities   总被引：2，自引：1，他引：2  

Jean Andrey  Brian Mills  Mike Leahy  Jeff Suggett 《Natural Hazards》2003,28(2-3):319-343

Inclement weather creates a chronic hazard for Canadian travellers. Past studies indicate that road collision rates increase during precipitation, although the magnitude of theincrease varies from study to study, partly as a result of variations in weather and driving conditions,but also because of differences in methods. The goal of the current study is to improve ourunderstanding of the links between weather and travel risk in mid-sized Canadian cities by using astandardized method for analyzing data from six cities with different climates: Halifax-Dartmouth,Ottawa, Québec, Hamilton, Waterloo Region, and Regina. The study has four interrelated objectives: (1) Toconduct a sensitivity analysis to determine the extent to which risk estimates vary depending onthe criteria used to define precipitation events and `normal' conditions; (2) To compare therelative risk of collision and injury during precipitation relative to `normal' conditions; (3) Todetermine the extent to which weather-related risks vary fordifferent Canadian cities; and (4) To explore any differences in collision characteristics between events and controls, especially as theyvary from city to city. Results are based on a matched-pair analysis, using six-hour time blocks over afour-year period, 1995 to 1998. Results indicate only modest sensitivity to the criteria used to define precipitation events and `normal' conditions. On average, precipitation is associated with a 75 percentincrease in traffic collisions and a 45 percent increase in related injuries, as compared to `normal'seasonal conditions, but risk levels vary depending on the characteristics of the weather event.Both sensitivity to specific weather conditions and weather-related accident profiles vary from city tocity in ways that are not easily explained.  相似文献   

车辆导航系统中定位数据处理和地图匹配技术   总被引：11，自引：1，他引：11  

许志海张昭云  陈应东 《测绘学院学报》2003,20(4):247-250

分析了GPS误差来源，并提出了相应的处理办法；融合电子地图中的道路数据和GPS所提供的定位数据的地图匹配算法，可以有效地提高车辆导航的定位精度。在分析各种地图匹配算法基础上，提出了一种实用的地图匹配方法，并且在实践中得到了验证。  相似文献