Inpho交互式方位角定义在ADS影像 生产中的应用与研究

目前,Inpho全数字摄影测量系统针对航空三线阵影像具有较为成熟的处理流程。但是随着摄区环境和飞行成本要求的不断提高,航线方向不再局限于坐标轴方向,斜飞模式逐渐增多。本文在Inpho系统DOM影像制作原理的基础上,对比研究交互式方位角定义在ADS影像生产中的普遍适用性,进一步优化Inpho系统针对ADS数据的解决方案。     

基于ADS40的数字摄影测量生产体系研究与应用

ADS40是一种集成POS的高分辨率机载三线阵推扫型数字航空相机,针对ADS40成像特点,研究和设计ADS40摄影测量生产体系.重点研究直接对地定位、空三解决方案等关键技术问题,在仪器生产厂家推荐的技术方案基础上,提出改进的数据处理方案,显著提高ADS40定位精度和可靠性.在山西省以及全国其他省市的应用表明,所设计的ADS40摄影测量生产体系,能够满足基础测绘以及高精度大比例尺测图的要求.     

ADS40推扫式数字航摄仪试验研究

ADS40是当今最先进的摄影测量系统之一,它采用推扫式三线阵获取影像,可以提供多种类型的数字影像数据。由于配备IMU/DGPS系统,在一定的基站范围内可以在无控制或少量控制点的情况下进行空三平差,极大地减轻了摄影测量外业控制工作量,缩短了生产周期,提高了作业效率。本文就ADS40的原理、数据处理流程,以及ADS40和常规摄影测量的区别,在精度等方面作了阐述和分析,并就其在我国摄影测量领域内的应用进行了展望。     

基于Inpho测量系统下ADS40数据的正射影像制作方法

结合1∶10 000 DOM生产实际情况,通过对ADS40影像数据生产正射影像过程的总结,介绍基于Inpho数字摄影测量系统下生产数字正射影像的独特方法。     

基于卫星平台的三线阵影像立体测绘方法研究

利用三线阵CCD（Charge Coupled Device）航天摄影测量技术实施无地面控制点条件下对地球及其他星球的测绘,实现对目标的三维高精度定位,是目前航天摄影测量与遥感领域的研究热点。本文针对三线阵CCD相机的成像原理和特点,研究了基于卫星平台的三线阵影像立体测绘方法,分析了卫星总体参数等对测绘精度的影响。同时,根据我国航天技术的现状和无地面控制点条件下的测绘精度要求,提出并简要论述了传输型卫星摄影测量系统的技术要点。主要研究内容和研究成果归纳如下：     

ADS40在带状线路测量中的应用研究

介绍ADS40机载三线阵推扫式数字航摄仪在带状线路测量中采用的作业模式、像控点的布设方案、数据处理流程和测图过程中高程值的获取方法,并与常规带状线路摄影测量的作业方法进行分析对比,对ADS40在带状线路测量中的优势进行评价.     

徕卡ADS40/ADS80数字航空摄影测量系统

一、ADS80系统概述 2001年7月,瑞士徕卡公司(Leica Geosystems)在荷兰阿姆斯特丹举行的第19届ISPRS(国际摄影测量与遥感协会)大会上正式推出了先进的基于线阵CCD扫描机载数字航空摄影测量系统ADS40.2008年7月,瑞士徕卡公司在中国北京举行的第21届ISPRS大会上又推出了ADS系列机载传感器的最新产品--ADS80机载数字航空摄影测量系统.目前,徕卡ADS系列数字航空摄影测量系统已在全球销售100余套.     

ADS80数码影像空三加密流程介绍及问题探讨

ADS80数字传感器作为当前先进的机载三线阵数字航摄系统,以其高分辨率高精度POS系统、多波段成像能力等优点逐步受到用户的青睐。通过基础测绘工作实践,主要介绍了基于ADS80数码影像空三加密的关键流程以及数据处理中的主要问题。     

ADS 80数字航空摄影测量立体测图高程精度分析

目前航空摄影主要有框幅式和线阵扫描两种基本成像方式,ADS航空摄影是线阵扫描航空摄影的一种。通过实际生产精度检查发现,ADS 80数字航空摄影的高程精度较传统框幅式航空摄影精度高。本文阐述了影响ADS 80数字航空摄影测量高程精度的两个主要因素,分析该摄影方式能够获取高精度高程的原因。     

三线阵CCD数字影像DEM自动生成数学模型

本文主要针对三线阵CCD相机独特的成像原理，阐述了三线阵CCD影像数字测量中的坐标关系以及在DEM自动生成过程中摄影测量的基础数学模型和算法，并通过实验验证了其数学模型和算法的正确性。     

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.     

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.     

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。     

地理数据库的关系模型及其实现

本文从以图论观点分析地理实体入手,系统阐述了地理数据库关系模型的设计法和过程。作者于1984年4～9月间在微型机上设计建立了关系型地理数据库的实方验系统(RGDB)。该系统采用了本文提出的关系模型,采用了可动态扩库的子库组合结构,这种结构具有灵活性和提高空间利用率的优点。RGDB含有多种功能的数据操作命令,除了具有一般检索功能外,还能进行“开窗”选取和十分“自由”的映象选取。本文对RGDB系统的主要性能和实现途径作了扼要介绍。