搜索结果: 1-15 共查到“知识库 地球形状学”相关记录22条 . 查询时间(3.187 秒)
Nature：冥古宙时期含水的不均一地幔与宜居地球的形成（图）
冥古宙时期 不均一地幔 宜居地球 含水
2023/1/14
地球是已知唯一存在生命的星球，在地球形成最初的5亿年，地球环境可能经历了从炼狱到摇篮的剧烈转变。对于大气圈的演化而言，地球早期的大气由浓厚的CO2等温室气体组成，不利于生命的存在。而到了冥古宙末期，大气中CO2分压就已经极低。CO2是温室气体的主要成分，可以以深海碳酸盐矿物的形式进入地幔被封存在地球内部。但是冥古宙时期，究竟是何种过程导致了如此巨量的CO2被封存在地幔深部？早期地球又如何演化成为生...
RESEARCH ON THE CONSTRUCTION METHOD OF COMPREHENSIVE EVALUATION INDEX OF GEOGRAPHIC CONDITIONS
Geographic conditions Index Mathematical method Evaluation
2016/11/23
This article proposes a construction method for a comprehensive geographic conditions evaluation index based on geographic conditions survey data combined with thematic data on society, economy, ecolo...
COPERNICUS–PRACTICE OF DAILY LIFE IN A NATIONAL MAPPING AGENCY?
Copernicus programme Copernicus services land monitoring public authorities BKG projects
2016/7/5
Copernicus is an European system created for Earth observation and monitoring. It consists of a set of Earth observation satellites and in-situ sensors that provide geo-information that are used, thro...
Applying two dimensional Kalman Filtering for Digital Terrain Modelling
Applying two dimensional Kalman Filtering Digital Terrain Modelling
2016/5/23
Digital Elevation Models (DEMs) have been increasingly used to model the terrain surfaces to provide the 'physical bases' for environmental studies. However, DEM is subject to systematic errors, rando...
ALOS PALSAR OBSERVATION OF KILAUEA VOLCANO ACTIVITIES FROM 2006 TO 2009
DInSAR Ground Deformation Disaster Mitigation Kilauea Volcano Volcano Modelling
2016/3/17
Volcanic eruptions are one of the most serious of nature’s calamities, threatening both human lives and property in its immediate vicinity. The dangerous environment surrounding a volcano also causes ...
DERIVING LAND USE AND CANOPY COVER FACTOR FROM REMOTE SENSING AND FIELD DATA IN INACCESSIBLE MOUNTAINOUS TERRAIN FOR USE IN SOIL EROSION MODELLING
Illumination variations correction of topography induced constrains Canopy cover factor estimation NDVI
2016/1/3
Soil erosion is one of the severe land degradation problems in many parts of the world. It not only affects on decreasing agricultural productivity but also it causes disasters such as siltation of re...
an integrated model to estimate the accuracy of digital orthoimages from high resolution satellite imagery
Earth observation Very high resolution satellite Accuracy Orthorectification QuickBird Modelling
2015/9/1
In this work, a theoretical-empirical model has been developed for the modelling of the local geometric accuracy of digital orthoimages from panchromatic QuickBird Very High Resolution Satellite Image...
BIG DATA BREAKING BARRIERS – FIRST STEPS ON A LONG TRAIL
Big Data Digital Earth Breaking Barriers
2015/5/7
Most data sets and streams have a geospatial component. Some people even claim that about 80% of all data is related to location. In the era of Big Data this number might even be underestimated, as ...
A FILTERING METHOD OF AIRBORNE LASER SCANNER DATA FOR COMPLEX TERRAIN
Laser scanning LIDAR DEM/DTM
2015/3/24
A new filtering method of airborne laser scanner data has been developed that is suitable for complex terrain, that is flat but with
artificial depression such as openings of underground tunnels, ty...
PROCESSING OF 3D BUILDING MODELS FOR LOCATION AWARE APPLICATIONS
Navigation Orientation Augmented Reality
2015/3/24
Within the paper the integration of 3D building models in the context of location aware services is presented by two exemplary
applications. First the intuitive access to object related information w...
SPATIO-TEMPORAL KNOWLEDGE REPRESENTATION AND ANALYSIS FOR EARTHQUAKE DISASTER MANAGEMENT
Knowledge representation disaster management earthquakes spatiotemporal
2015/3/6
This paper examines the importance of integrating different spatial and temporal knowledge representations in order to structure disaster relevant information. Special focus is made here on the human-...
INFLUENCE OF TOPOCLIMATIC VARIABLES DERIVATED FROM DIGITAL TERRAIN MODELS OVER THE VEGETATION REGENERATION PROCESSES IN BURNED AREAS
DTM NDVI curvature maps direct solar radiation maps upslope catchment area regenertion vegetal cover
2015/2/4
In this work, the signification of some topo-climatic variables deduced from a DEM over vegetation regeneration
processes after wildfires monitored on a semi-arid region from Landsat TM images has be...
地球静止轨道卫星广播星历参数拟合与试验分析
GEO 星历拟合 相关性 岭估计
2011/7/29
我国的区域卫星导航系统COMPASS中，广播星历利用考虑一阶摄动影响的15个轨道根数参数描述卫星轨道，系统导航电文中给每个参数分配的比特位与GPS相同。然而，由于GPS星座由周期约12小时的MEO卫星构成，其轨道参数化方案和每个参数的比特位分配方案可能不适用于更高轨道的GEO和IGSO卫星。COMPASS的系统设计中考虑了由于GEO的小倾角、小偏心率特点产生的广播星历拟合精度损失问题，然而在系统组...
等高线河流数据集成中的匹配及一致性改正
空间数据匹配 Delaunay三角网 空间数据质量
2012/3/22
等高线作为地势起伏与地形凹凸特征的表达，与河流水系表达有着密切的约束关系。在空间数据库集成与匹配中，由于来源不同这两种数据往往出现不一致，导致河流“爬坡”现象。本研究针对该问题提出一种等高线河流匹配及一致性改正方法,利用Delaunay三角网模型在等高线基础上通过弯曲分析提取地形特征，基于河流分布与谷地走势的相关性，建立河流与等高线间的匹配关系，进而识别两者间的一致性与否。在此基础上利用仿射变换等...