免棱镜全站仪在地形图测绘中的精度分析

现在的地形测绘中免棱镜全站仪的应用越来越多。与有棱镜全站仪相比,免棱镜全站仪在地形测绘中的测量精度要相对较高,尤其是在大比例尺地形图测绘中,免棱镜全站仪有较为明显的优势。本研究采用免棱镜全站仪进行地形图测绘,分析测量中主要的误差来源。根据实际测得的数据进行平面和高程精度分析,并指出使用免棱镜全站仪在地形图测绘中应注意的问题。经过研究分析验证,在全站仪免棱镜模式下进行大比例尺地形测量中,其测量精度可以满足测图要求。     

全站仪免棱镜测量外符合精度的室内测试方法

为探究不同材质的反射面对全站仪免棱镜模式测量结果的影响,以Leica TM30全站仪为例,介绍了一种免棱镜测量外符合精度室内测试的方法.利用Leica Axyz经纬仪测量系统高精度三维坐标测量的特性,将其测量值当作真值,通过对比两种方法的测量结果,验证了在10m范围内,TM30全站仪免棱镜测量模式的三维坐标整体误差在0.5～2.0 mm.对于较为平整光滑的反射面,其测量精度较高,反之测量相对粗糙的反射面时,其精度较低.针对室内短程建筑测量,提供了一种可靠的外符合精度测试方法.     

对无棱镜反射测量精度的探讨

无反射棱镜全站仪是无反射棱镜测距技术与传统全站仪的结合,它具有普通全站仪所不具备的优点。以徕卡TCR402为例,在无反射棱镜条件下对测量精度进行多方面的测试,得出无棱镜测距精度与距离、反射物体的属性及气象条件等有关,并在特殊条件下（如透明物体等）测量距离存在偏差的结论。     

全站仪免棱镜测绘线路横断面

测绘横断面是线路勘测的重要工作之一,若能准确、快速测绘横断面会取得显著的经济效益。介绍了全站仪免棱镜测量的基本原理,并对其测量精度作了分析,论述其在较差的测量条件下,简捷、高效、准确测绘横断面的具体应用和注意事项,具有实际指导意义。     

不同反射条件下免棱镜测距精度分析

免棱镜全站仪是免棱镜测距技术与传统全站仪的融合[1],是全站仪测距模式的巨大突破.以Leica TS06 PLUS全站仪为例,在免棱镜模式下,对不同材质、颜色、光滑度、入射角反射面进行测距实验,结合测距时间、光斑面积的变化,分析不同反射条件下免棱镜的测距精度.     

徕卡TM30测量机器人三维测量在基坑边坡监测中的应用

介绍利用徕卡TM30测量机器人自由设站三维测量进行建筑物基坑边坡监测的方法,以代替传统测量方法进行建筑物基坑边坡监测,并通过精度预计和观测试验探讨该方法的技术可行性.     

点滴测绘记录巨大智慧凝聚--欢迎参加徕卡测量优秀论文有奖征集活动

为激励广大徕卡用户使用徕卡测量仪器积极进行测绘地理信息应用创新,总结徕卡测量仪器在各行各业中起到的重要作用和宝贵经验,同时鼓励广大用户积极向《测绘通报》投送原创性、高水平论文,徕卡测量联合《测绘通报》特此举办优秀论文有奖征集活动。活动面向所有徕卡测量用户展开,欢迎所有使用徕卡测量产品的用户踊跃投稿,所有稿件将由徕卡测量、《测绘通报》及邀请到的业内知名专家组成的权威评审团进行评选。     

免棱镜测量在地籍测量中的应用研究

利用免棱镜进行地籍测量,对于高精度的界址点测量无反射棱镜模式测量能否达到其精度、在界址点观测时有什么要求、界址点测量时有何注意事项,通过实验进行了系统的阐述与总结。     

廊桥立面测量方法研究

利用免棱镜测绘技术测量廊桥立面,通过测站改正、互换数据列等方法编辑处理,使假定坐标系下三维坐标数据转换成实用正立面数据,达到直接展点绘图目的。经点位精度分析,得出此种方法满足廊桥立面测量的精度要求。     

徕卡TCA全站仪在跟踪定位工程中的应用

一、引言徕卡TCA自动型全站仪又称测量机器人,具有自动照准、锁定跟踪、联机控制等功能。TCA应用ATR模式自动识别目标,当全站仪发送的红外光被反射棱镜返回并经全站仪内置的CCD相机判别接受后,马达就驱动全站仪自动转向棱镜,并自动精确测定;由于全站仪自动精确照准,减少了人员照准误差等,提高了观测精度。在LOCK模式下,能自动锁定反射棱镜,即使棱镜的移动速度达到5m/s时(100m处),信号也不会中断。利用跟踪测量模式,可连续跟踪采样,进行实时、快速、动态测量。如果配上RCS遥测系统,及360度棱镜,可实现测站无人操作,由扶棱镜杆者遥控…     

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。     

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...     

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.     

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.     

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。     

“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.     

Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services

Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders.     

GIS空间数据的采集误差及其分析

本文详细阐述了GIS数据采集过程中的误差来源，重点分析了通过地图、遥感和摄影测量等方式采集数据所产生的误差及其特性，分析了其对GIS数据的影响与消减方法。