A Parasitic Model is proposed in this study for Digital Earth running on mobile phones through a mobile network.Because of mobile phones’limited capabilities in high-performance computing,rendering,storing,and networ...A Parasitic Model is proposed in this study for Digital Earth running on mobile phones through a mobile network.Because of mobile phones’limited capabilities in high-performance computing,rendering,storing,and networking(CRSN),these functions are accomplished by a superior host computer in this model.Rendered virtual scenes are compressed in a time-series as a data stream and are sent to the mobile phone through a mobile network,thus allowing Digital Earth to be operated on a mobile phone.This study examines a prototype and shows that a Mobile Digital Earth based on a Parasitic Model can achieve functionality beyond the mobile phone’s actual hardware capabilities and can reduce network traffic.These results demonstrate quasi-real-time interactions,but with bandwidth increases in next-generation mobile networks such as 4G and 5G,there is potential for real-time interactions in the near future.展开更多
The effect of Digital Earth on our life is vital.Developing and updating Geospatial data in Digital Earth is also essential.This paper presents the application of a new approach of image registration in Digital Earth....The effect of Digital Earth on our life is vital.Developing and updating Geospatial data in Digital Earth is also essential.This paper presents the application of a new approach of image registration in Digital Earth.The approach was developed based on registering a mono photograph on a master 3D model.The result is a 3D vector model,which can be broadly applied in visualisation,mapping,geographic information system(GIS),planning,change detection,as well as Digital Earth.The approach does not require parameters of correction for transformation.The accuracy of the output depends on the accuracy of the master data.This approach is very versatile and able to register any image on the digital elevation model,digital surface model and topographic 3D model.展开更多
With the development and progress of science and technology,road and bridge design has experienced rapid development,from the initial manual drawing design to the popularity of Computer-Aided Design(CAD),and then to t...With the development and progress of science and technology,road and bridge design has experienced rapid development,from the initial manual drawing design to the popularity of Computer-Aided Design(CAD),and then to today’s digital software design era.Early designers relied on hand-drawn paper design forms which was time-consuming and error-prone.Digital support for road and bridge design not only saves the design time but the design quality has also achieved a qualitative leap.This paper engages in the application of digital technology in road and bridge design,to provide technical reference for China’s road and bridge engineering design units,to promote the popularity of Civil3D and other advanced design software in the field of engineering design and development,ultimately contributing to the sustainable development of China’s road and bridge engineering.展开更多
This paper discusses the role of Geoinformatics as a new scientific discipline designed for handling of geospatial information.Depending on the scientific background of the people involved in shaping the emerging disc...This paper discusses the role of Geoinformatics as a new scientific discipline designed for handling of geospatial information.Depending on the scientific background of the people involved in shaping the emerging discipline,emphasis may be placed on different aspects of Geoinformatics.Applications and developments may address geoscientific,spatial planning,or computer science related matters.The scientific field of Geoinformatics encompasses the acquisition and storing of geospatial data,the modelling and presentation of spatial information,geoscientific analyses and spatial planning,and the development of algorithms and geospatial database systems.It is the position of the author that these tools from Geoinformatics are necessary to bridge the gap between Digital Earth models and the real world with its real-world problems(‘connecting through location’).It is,however,crucial that Geoinformatics represents a coherent integrated approach to the acquisition,storage,analysis,modeling,presentation,and dissemination of geo-processes and not a patchwork solution of unconnected fields of activity.Geoinformatics is as such not a part of Geography,Surveying,or Computer Science,but a new self-contained scientific discipline.The current paper highlights international and national trends of the discipline and presents a number of Geoinformatics initiatives.The research and teaching activities of the newly formed Institute for Geoinformatics and Remote Sensing(IGF)at the University of Osnabrueck serve as an example for these initiatives.All these developments have lead to the long overdue formation of a scientific‘Society for Geoinformatics’(German:Gesellschaft fu¨r Geoinformatik-GfGI)in Germany.展开更多
古地理重建是研究地质历史时期地表构造过程、海陆格局和地貌环境特征的一项综合研究,并通过绘制表达海洋和大陆的古代轮廓以及重要的地形和地表环境的地图来呈现,是还原地球演化历史、预测能源矿产分布、认识生命和气候演变的基础性工...古地理重建是研究地质历史时期地表构造过程、海陆格局和地貌环境特征的一项综合研究,并通过绘制表达海洋和大陆的古代轮廓以及重要的地形和地表环境的地图来呈现,是还原地球演化历史、预测能源矿产分布、认识生命和气候演变的基础性工作。随着大数据时代的到来,数字化方法的应用为古地理图快速更新和友好呈现提供了方便。目前,全球有多个团队发布了数字化的全球古地理重建模型以及相关的数据和方法,如EarthByte、PaleoMap、UNIL、Deep Time Maps等团队。笔者研究团队基于“深时数字地球(Deep-time Digital Earth,DDE)”国际大科学计划提出的数据-知识-模型驱动的古地理重建思想,提出基于数字化方法驱动的升级更新全球古地理图的新流程,并通过不断尝试地球科学与信息科学的交叉融合,从知识图谱、大数据分析和机器学习技术等方面开发了多项古地理重建应用技术。以东特提斯域中二叠世—中三叠世的古地理重建为例,首先在GPlates软件平台上重建了板块构造框架,再利用岩相古地理图自动生成地形地貌图并结合人工校正,最后在GPlates软件通过图层叠加实现了中二叠世—中三叠世东特提斯域的动态数字综合古地理重建。本用例与广泛使用的Scotese(2021)的古地理图对比,在成图效率、数据丰富性和可追溯性、模型准确性等方面都有明显提升,并为该时期板块运动、冰期消亡、大洋缺氧和生物灭绝等重大地质事件的研究提供新的约束和启示。展开更多
基金supported by the National Natural Science Foundation of China(40871181)the Key Knowledge Innovative Project of the Chinese Academy of Sciences(KZCX2-EW318)+1 种基金the Plans of the National Sci-Tech Major Special Item 2012ZX10003-005key technology and applications of the integration of remote sensing geo-information and model computing based on cloud computing。
文摘A Parasitic Model is proposed in this study for Digital Earth running on mobile phones through a mobile network.Because of mobile phones’limited capabilities in high-performance computing,rendering,storing,and networking(CRSN),these functions are accomplished by a superior host computer in this model.Rendered virtual scenes are compressed in a time-series as a data stream and are sent to the mobile phone through a mobile network,thus allowing Digital Earth to be operated on a mobile phone.This study examines a prototype and shows that a Mobile Digital Earth based on a Parasitic Model can achieve functionality beyond the mobile phone’s actual hardware capabilities and can reduce network traffic.These results demonstrate quasi-real-time interactions,but with bandwidth increases in next-generation mobile networks such as 4G and 5G,there is potential for real-time interactions in the near future.
文摘The effect of Digital Earth on our life is vital.Developing and updating Geospatial data in Digital Earth is also essential.This paper presents the application of a new approach of image registration in Digital Earth.The approach was developed based on registering a mono photograph on a master 3D model.The result is a 3D vector model,which can be broadly applied in visualisation,mapping,geographic information system(GIS),planning,change detection,as well as Digital Earth.The approach does not require parameters of correction for transformation.The accuracy of the output depends on the accuracy of the master data.This approach is very versatile and able to register any image on the digital elevation model,digital surface model and topographic 3D model.
文摘With the development and progress of science and technology,road and bridge design has experienced rapid development,from the initial manual drawing design to the popularity of Computer-Aided Design(CAD),and then to today’s digital software design era.Early designers relied on hand-drawn paper design forms which was time-consuming and error-prone.Digital support for road and bridge design not only saves the design time but the design quality has also achieved a qualitative leap.This paper engages in the application of digital technology in road and bridge design,to provide technical reference for China’s road and bridge engineering design units,to promote the popularity of Civil3D and other advanced design software in the field of engineering design and development,ultimately contributing to the sustainable development of China’s road and bridge engineering.
文摘This paper discusses the role of Geoinformatics as a new scientific discipline designed for handling of geospatial information.Depending on the scientific background of the people involved in shaping the emerging discipline,emphasis may be placed on different aspects of Geoinformatics.Applications and developments may address geoscientific,spatial planning,or computer science related matters.The scientific field of Geoinformatics encompasses the acquisition and storing of geospatial data,the modelling and presentation of spatial information,geoscientific analyses and spatial planning,and the development of algorithms and geospatial database systems.It is the position of the author that these tools from Geoinformatics are necessary to bridge the gap between Digital Earth models and the real world with its real-world problems(‘connecting through location’).It is,however,crucial that Geoinformatics represents a coherent integrated approach to the acquisition,storage,analysis,modeling,presentation,and dissemination of geo-processes and not a patchwork solution of unconnected fields of activity.Geoinformatics is as such not a part of Geography,Surveying,or Computer Science,but a new self-contained scientific discipline.The current paper highlights international and national trends of the discipline and presents a number of Geoinformatics initiatives.The research and teaching activities of the newly formed Institute for Geoinformatics and Remote Sensing(IGF)at the University of Osnabrueck serve as an example for these initiatives.All these developments have lead to the long overdue formation of a scientific‘Society for Geoinformatics’(German:Gesellschaft fu¨r Geoinformatik-GfGI)in Germany.
文摘古地理重建是研究地质历史时期地表构造过程、海陆格局和地貌环境特征的一项综合研究,并通过绘制表达海洋和大陆的古代轮廓以及重要的地形和地表环境的地图来呈现,是还原地球演化历史、预测能源矿产分布、认识生命和气候演变的基础性工作。随着大数据时代的到来,数字化方法的应用为古地理图快速更新和友好呈现提供了方便。目前,全球有多个团队发布了数字化的全球古地理重建模型以及相关的数据和方法,如EarthByte、PaleoMap、UNIL、Deep Time Maps等团队。笔者研究团队基于“深时数字地球(Deep-time Digital Earth,DDE)”国际大科学计划提出的数据-知识-模型驱动的古地理重建思想,提出基于数字化方法驱动的升级更新全球古地理图的新流程,并通过不断尝试地球科学与信息科学的交叉融合,从知识图谱、大数据分析和机器学习技术等方面开发了多项古地理重建应用技术。以东特提斯域中二叠世—中三叠世的古地理重建为例,首先在GPlates软件平台上重建了板块构造框架,再利用岩相古地理图自动生成地形地貌图并结合人工校正,最后在GPlates软件通过图层叠加实现了中二叠世—中三叠世东特提斯域的动态数字综合古地理重建。本用例与广泛使用的Scotese(2021)的古地理图对比,在成图效率、数据丰富性和可追溯性、模型准确性等方面都有明显提升,并为该时期板块运动、冰期消亡、大洋缺氧和生物灭绝等重大地质事件的研究提供新的约束和启示。
文摘“合成孔径雷达干涉 (In SAR)”是近十年发展起来的空间对地观测遥感新技术。它具有从覆盖同一地区的星载 (或机载 )合成孔径雷达复数图像对提取干涉相位图 ,借助于雷达成像时的姿态数据重建地表三维模型 (即数字高程模型 )的巨大潜力。尤其是基于多幅雷达复数图像处理的差分干涉技术 (D- In SAR)可以用于监测地表形变 ,精度可达厘米级甚至更高 ,其监测空间分辨率是前所未有的。介绍了 In SAR和 D- In SAR的基本原理 ,对影响干涉结果的一些重要因素做了分析 ,重点回顾和展望了差分干涉技术在与地表形变有关的地震监测和震后形变测量、地面下沉和山体滑坡、火山运动监测等方面应用的现状和前景。
