搜索结果: 16-30 共查到“知识库 大地测量技术”相关记录398条 . 查询时间(3.001 秒)
Investigation into the automatic generation of heights of different Danish landscape types
automatic generation heights different Danish landscape types
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2016/5/23
This article describes an investigation using automatic generation of heights over a typical Danish landscape. For this investigation the program Match-T has been used. The investigation is carried ou...
Multitemporal effects in regional planning over a part of semi-arid regions of Paraiba, Brazil
Multitemporal effects regional planning over semi-arid regions Paraiba Brazil
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2016/5/23
The present study is a part of the CNPQ project no. 521477/96-4, which is being carried in the semi-arid region (lower part of the higher Piranhas) of the state of Paraíba in northeastern Brazil. The ...
The challenges of 3D modelling in a dense urban environment
challenges 3D modelling dense urban environment
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2016/5/23
In its traditional form, photogrammetry has developed a rich suite of procedures for measurement and mapping of natural topographic forms, including low-relief areas as well as mountainous regions. Th...
Mosaicking of Digital Elevation Models derived by SAR interferometry
Mosaicking Digital Elevation Models derived SAR interferometry
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2016/5/20
In the framework of the Shuttle Radar Topography Mapper (SRTM) Mission the generation of high-quality Digital Elevation Models (DEMs) with global coverage of the earth's surface is envisaged. In this ...
Data interchange: Helping to survive existing transfer standards
Spatial Data Access Interchange Point Data Vector Data
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2016/5/20
Exchange of data between different software/hardware systems has traditionally involved porting data directly from System A to System B. With large numbers of systems, this tradition has created very ...
Land cover classification: Some new techniques, new source data
Environmental variables Global Land Cover AVHRR Satellite Imagery
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2016/5/20
Land cover classifications have advanced from using single Landsat Multispectral Scanner scenes to using "full resolution" AVHRR time series. Three current approaches to global land cover study with A...
Development & assessment of the global land one-km base elevation Digital Elevation Model (GLOBE)
Environmental variables Global Database Topography
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2016/5/20
The Global Land One-kilometer Base Elevation (GLOBE) digital elevation model is the most thoroughly designed, reviewed, and documented global digital elevation dataset to date. GLOBE was developed by ...
High resolution digital terrain models of shallow lake basins - Towards modelling dynamics of sedimentation for multithematic ecosystems research
High resolution digital terrain models shallow lake basins Towards modelling dynamics sedimentation multithematic ecosystems research
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2016/5/20
Research on GIS applications in the real world context has to be strengthened besides developing GIS application software itself. An ecologically important field of applications is the integration of ...
Updating topographic databases with ARC INFO; client fitted creation of change-only information
topographic databases ARC INFO change-only information
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2016/5/20
Most of the existing change-only solutions for updating topologically structured, topographic databases only work in ideal conditions. We therefore decided to develop a new procedure that would also b...
Design and first steps in the development of OPALIS
Design first steps development OPALIS
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2016/5/20
Integrated access to the many heterogeneous and distributed sources of Geo data is an important precondition in order to facilitate the investigation of global processes like temporal development of e...
图像定位技术在现实中有广泛的应用，如导航、路径规划、虚拟现实等.对于用户而言，只需拍摄一张图像即可实现定位.本文提出了一种基于射线摄像机模型的图像定位系统，包含基于射线模型的三维重构算法和基于位姿图优化的图像定位方法.提出的三维重构算法利用射线模型的内在几何性质，能够处理全景和鱼眼等广角摄像机模型，降低采集和重构的代价，提升重构的效果.基于位姿图的定位方法融合了图像与点云匹配的信息和图像间相对位姿...
采用低中频架构设计了一种0.18μm CMOS工艺的GPS/BDS双模可重构接收机射频前端，能在GPS L1模式或BDS B1模式下工作。通过频率自适应电路调整中频滤波器的时间常数,降低其频率不确定度；压控振荡器中加入4位开关电容阵列，以提高频率调谐范围和相位噪声性能；通过硬件复用的方式降低系统功耗。测试结果表明，在1.8 V电源电压下，功耗37.8 mW，电压增益为103 dB，GPS L1和B...
Case Study–Use of Video Clips in a Virtual Learning Environment to enhance the learning experience of our students
Video clips student centred learning multi layered teaching enhanced student experience student opinions
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2016/1/29
This paper considers how the use of video clips integrated into a virtual learning environment has been perceived by students on a land surveying module within a civil engineering degree. The increasi...
ESTIMATION OF THE ACCURACY OF THE SRTM TERRAIN MODEL ON THE AREA OF POLAND
SAR Interferometer DEM/DTM Reference Data Statistic Accuracy Analysis
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2015/12/30
In order to determine the absolute accuracy of SRMT model on Polish area the research work has been performed on the basis of reference terrain profiles measured by GPS technique. The flat and hilly t...
SUBSIDENCE MEASUREMENT WITH PS-INSAR TECHNIQUES IN SHANGHAI URBAN
DInSAR PS-InSAR Subsidence Measurement Urban
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2015/12/30
Spaceborne SAR Differential interferometry (DInSAR) has been used to monitor some geological disasters such as ground subsidence. This paper applies two Permanent Scatterer InSAR(PS-InSAR) techniques ...