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MONITORING OF LANDSLIDES WITH MASS MARKET GPS: AN ALTERNATIVE LOW COST SOLUTION
Low cost GNSS Virtual RINEX Network RTK deformation monitoring
2014/4/24
The territory of Italy is seriously afflicted by hydrological risk, with 82% of its area affected by this phenomenon.
In recent years, technologies and advanced research have played an important role...
GIS APPROACH FOR PREVENTIVE EVALUATION OF ROADS LOSS OF EFFICIENCY IN HYDROGEOLOGICAL EMERGENCIES
GIS Hydrogeology Hazards Decision Support.
2014/4/24
The theme of the simulation of hydrogeological risk with GIS technology is analyzed with focus on the modeling of the architecture
of a Spatial Data Base to support risk analysis and on the construc...
14 YEARS OF GPS TROPOSPHERIC DELAYS IN THE FRENCH-ITALIAN BORDER REGION: A DATA BASE FOR METEOROLOGICAL AND CLIMATOLOGICAL ANALYSES
Climate Databases Geodesy Meteorology Monitoring International Networks GPS
2014/4/24
GPS data from 181 permanent stations extracted from different networks covering France and the Italian part of the Alps are used to
estimate a homogeneous set of tropospheric parameters over 14 year...
THE ELEVATION NET FOR THE SALTWATER INTRUSION PHENOMENON ANALYSIS IN THE COASTAL PLAIN OF PISA
Surveying, Hydrology Environment DEM/DTM LIDAR Georeferencing Model
2014/4/24
In coastal plains, such as that of Pisa, with particular reference to groundwater, the marine intrusion phenomenon occurs not only
through the freshwater/saltwater interface in the aquifer along the...
COMPARING DATA ACQUISITION METHODOLOGIES FOR DTM PRODUCTION
LiDAR 3D Modelling DTM DSM risk analysis
2014/4/24
In this paper we present the results related to several field campaigns conducted in the last three years in a small (4.4 km2)
wilderness basin in Carnia, a tectonically active alpine region in nort...
THE CONTRIBUTION OF GIS IN FLOOD MAPPING: TWO APPROACHES USING OPEN SOURCE GRASS GIS SOFTWARE
Spatial Information Sciences Hazards DEM/DTM Disaster Open Systems
2014/4/24
The first step of a risk assessment analysis is the evaluation of flood-prone areas. Its importance is considered for both managing and
planning emergency activities, such as hydraulic risk reductio...
A PUBLIC PLATFORM FOR GEOSPATIAL DATA SHARING FOR DISASTER RISK MANAGEMENT
GeoNode Geospatial Data Sharing Spatial Data Infrastructure Web GIS
2014/4/24
Several studies have been conducted in Africa to assist local governments in addressing the risk situation related to natural hazards.
Geospatial data containing information on vulnerability, impact...
武汉大学中国南极测绘研究中心2013年招收攻读硕士学位研究生招生目录。
本文回顾了近20年国内外国家局部大地水准面模型研究的概况和发展背景，采用Stokes-Helmert方法，计算了一个新的2′×2′中国重力和1985国家高程基准似大地水准面数值模型（CNGG2011），采用了1百万余陆地重力数据和SRTM 7″.5×7″.5地形高数据，以及649个B级GPS水准点数据。CNGG2011平均精度为±0.13m，东部地区±0.07m，西部地区±0.14m。各省区局部似...
高精度海岸带重力似大地水准面的若干问题讨论
Molodensky框架 地形影响 Helmert凝聚 移去恢复法 大地测量基准
2012/12/25
本文针对海岸带多源重力数据和地形特点，通过理论分析和试算，对若干影响厘米级似大地水准面确定的关键问题进行了剖析，得出一些有益的结论。我国海岸带Molodensky一阶项对高程异常的贡献在10～30cm，需在Molodensky框架中精化重力似大地水准面；精细处理地形影响是提升多源重力场数据处理水平的重要途径；地球外空间不同高度、任意类型重力场参数的地形影响、地形补偿和地形Helmert凝聚算法可以...
本文利用西龙池（位于山西省境内）上水库的GPS短基线连续观测数据，计算得到23个月的坐标时间序列，分析并评估了多路径效应对序列中线性项以及周年信号的影响，进而确定了西龙池上水库长期变形趋势。结果表明：自初次蓄水完成后，西龙池上水库整体稳定，主、副坝平面方向上存在微弱的线性变形。其中位于主坝上的测点L022运动速度为北偏东80°，2.2mm/yr，S071为主坝体北向断面上测站，其速度为北偏东109...
黑河流域水储量变化对该区域的生态环境和经济建设等具有重要影响。本文利用2002年8月至2011年6月GRACE（Gravity Recovery and Climate Experiment）时变重力场模型GRGS-EIGEN-GL04，采用去相关滤波P3M6与300km高斯滤波相结合的滤波方法反演了黑河流域陆地水储量变化，扣除GLDAS（Global Land Data Assimilation...
环球航行揭开海洋“最小”的秘密（图）
“塔拉海洋” 远征探险 “塔拉号”
2012/7/18
一项足迹遍及全世界的科学航海之旅为搞清全球海洋广袤的生物多样性洒下了一缕阳光。根据对样本的初步分析，这次被称为“塔拉海洋”的远征探险已经生成了约150万种不同的浮游生物类群。科学家将花费数年的时间用来分析这些战利品，“塔拉海洋”项目的联合主任Eric Karsenti于日前正在爱尔兰共和国都柏林市举行的欧洲科学开放论坛上介绍了这次探险活动的有关情况。
我国将查南海中北部珊瑚礁“家底”
南海中北部 珊瑚礁 油气 生物资源
2012/7/18
“迄今为止，我国还没有专门针对南海某个海区珊瑚礁的全面、系统的本底调查。”科技基础性工作专项重点项目“南海中北部珊瑚礁本底调查”日前启动，项目负责人、中科院南海海洋研究所博士施祺接受《中国科学报》记者采访时表示，我国关于南海珊瑚礁的了解非常有限，很难满足有关环境变化和资源可持续利用的研究。