在成都统筹城乡土地管理制度改革现场研讨会上的总结讲话

为期三天的成都统筹城乡土地管理制度改革现场研讨会就要结束了，来自政府管理部门、科研院所、大专院校等单位300多名代表参加了会议。会议开始时，我们学习了李克强副总理对会议的重要批示。徐绍史部长、蒋巨峰省长、李春城书记作了重要致辞。葛红林市长系统介绍了成都市在统筹城乡发展中推进农村土地管理制度改革的做法。三天来，代表们分三路进行了考察，亲眼看到了成都市在灾后重建、统筹城乡发展中取得的成绩，亲身感受了综合改革给灾区农村带来的巨大变化，进一步思考了土地管理制度改革中的重大问题。会议前，以周其仁教授为首的北京大学课题组对成都市统筹城乡土地管理制度改革进行了系统的调研，在会上报告了初步成果。会议期间，各位专家和与会代表从不同层面交流了经验，从不同的角度贡献了智慧。刚才，三个组的代表分别介绍了分组讨论情况，魏宏副省长又作了重要讲话。会议取得了预期效果，开得很成功。     

基于插件技术的大地测量数据集成

研究了当前大地测量数据采集模式,分析了插件系统的信息流程,建立了大地测量数据采集插件接口和数据接口,实现了各种格式的大地测量外业数据的集成,增强了系统的扩展性.     

遥感技术在海南岛环境与资源调查中的应用

应用航空航天遥感技术对海南岛地质灾害、重点地区矿产资源、旅游资源进行了综合调查,系统分析了地质灾害形成条件与发展趋势,编制了海南岛地质灾害综合区划图;研究了重点地区金属矿、砂石矿分布规律,预测了成矿有利地段和找矿靶区;系统分析了岛内旅游资源分布现状与开发建设中存在的问题,编制了全省旅游规划卫星影像图,其成果为海南省资源开发与环境治理提供了重要基础资料。     

基于冻土地带建造GPS参考站的技术探讨

总结了高原冻土地带建造GPS参考站施工过程遇到的技术难点,分析了原因,提出了解决办法,通过实践总结了一些新的技术方案,有效解决建造设计和施工中的难点,大大提高了功效,节约了经费,提高了建造质量。     

现代地籍技术 第二讲 数字地籍测量

简述了数字测量技术的发展,对现有数字测量方法进行了模式化讨论,总结了各种模式的优缺点及其适用条件,详细讨论了数字地籍测量的特点,论述了数字地籍测量的基本框架.     

智能化专题地图内容选择的研究

首先详细阐述了智能化专题地图内容选择的基本理论问题;然后提出了一种“启发式”和“增强型智能化”相结合的问题解决方法并讨论了问题的分解策略和专题内容选择的质量评价方法;接着设计了试验系统的概念框架并建立了问题的知识模型,提出了用关系数据库的理论与方法模拟知识模型,为知识的获取提供了模式,为知识库的构建提供了方法;最后基于WebService开发了试验系统并举例说明了问题。     

扫描数字化对点误差的统计特性试验与分析

研究了通过扫描数字化试验,获取了GIS中特征点对点误差的基础数据,分析了误差的成因,讨论了误差的分布规律和统计特性,为扫描数字化精度控制及数据质量的评价提供了参考依据.     

在首届国土资源节约集约模范县（市）表彰大会交流总结会上的讲话

经过大家一天半的共同努力,首届国土资源节约集约利用模范县（市）表彰大会完成了预定议程,就要圆满结束了。这次会议正如大家总结的那样,规模大、规格高、内容实、效果好,令人鼓舞、催人振奋,既表彰了先进、宣扬了典型,又交流了经验、提高了认识,明确了任务,会议开得很成功。     

北斗卫星定位系统的技术特征分析与应用

给出了双星导航系统的发展历程，指出了北斗卫星导航系统的建立和组成；分析了北斗卫星导航系统的功能和定位原理，并在此基础上，通过与GPS系统的对比，分析了北斗卫星导航系统的技术特征，特别指出了北斗卫星导航系统在民用领域带来的经济效益；最后，展望了未来卫星导航系统的发展前景。     

基于GPS/DR车辆定位与导航系统应用研究

介绍了基于GPS／DR车辆定位系统的基本框架，将其划分为7个功能模块。给出了满足导航电子地图的数据结构。在分析影响地图匹配正确性因素的基础上，给出了基于模糊逻辑的地图匹配算法，显著提高了车辆定位精度。分析了车辆路线导航系统的特点，采用启发式搜索技术，提高了算法效率。最后给出了采用上述关键技术的车辆定位导航系统设计方案，该方案的软硬件都采用嵌入式设计。     

阿克苏河-塔里木河水系水质污染遥感监测与评价

 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。     

Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data

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.     

使用FME与VBA提取机场方格网高程数据

因受机场工程设计软件的测量数据容量限制,基于LiDAR采集、点云分类后得到的地面点云数据LAS不能完整应用于目前设计软件进行设计计算。本文通过对拟选技术方案的筛选,提出了利用FME Workbench数据处理功能,结合VBA编程获取外部方格网平面数据的方法。该方法在FME Workbench中实现了地面点云数据构建TIN、采用逐点内插方法从TIN中提取方格网高程数据、等高线生成及相应图形处理与成果输出。最终通过实际算例证明了该方法的有效性。     

Landslide risk analysis between Giri and Tons Rivers in Himachal Himalaya (India)

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.     

Gravity Changes Before Large Earthquakes in China: 1998-2005

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...     

GNSS系统及其技术的发展研究

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.     

“4D”技术及其应用

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。     

Virtual Australia: its key elements – know,think, communicate

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.     

自动车辆定位导航系统中传感器的误差分析

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。