Fuzziness is an internal property of spatial objects.How to model fuzziness of a spatial object is a main task of next generation GIS.This paper proposes basic fuzzy spatial object types based on fuzzy topology.These ...Fuzziness is an internal property of spatial objects.How to model fuzziness of a spatial object is a main task of next generation GIS.This paper proposes basic fuzzy spatial object types based on fuzzy topology.These object types are the natural extension of current nonfuzzy spatial object types.A fuzzy cell complex structure is defined for modeling fuzzy regions,lines and points.Furthermore,fuzzy topological relations between these fuzzy spatial objects are formalized based on the 9intersection approach.This model can be implemented for GIS applications due to its scientific theory basis.展开更多
Cartographic visualizations have been known for thousands of years and have brought forth a wealth of different map projections and cartographic products.Yet,cartography as an independent science has been established ...Cartographic visualizations have been known for thousands of years and have brought forth a wealth of different map projections and cartographic products.Yet,cartography as an independent science has been established only about 100 years ago and sometimes its position among the spatial disciplines is challenged by the scientific community.In this respect it is a young science based on a very long tradition of map making,globe production,and the development of map projections.Maps and map related visualizations play an important and indispensable role in many other spatial disciplines such as geography and geodesy.Cartography has many overlaps with these traditional disciplines as well as with the more recent ones of photogrammetry and remote sensing.This paper reviews fundamental aspects of the conception of space and time throughout human history,the historic development of cartography from a technique of map making to a spatial science,highlighting major milestones in the history of the discipline.As a young science and confronted with major technological developments in the late 20^(th)century cartography underwent several crises as to what exactly is cartography and how it relates to other spatial sciences,in particular to geographic information systems.Major pitfalls and misconceptions are discussed and the three major scientific pillars of cartography are identified.The relationships of cartography with neighboring disciplines are discussed and the position of cartography vis a vis the others is delineated.Finally,desirable future developments of scientific cartography are discussed.展开更多
The Austrian node of the Natural Resources Satellite Remote Sensing Cloud Service Platform was established in 2016 through a cooperation agreement between the Land Satellite Remote Sensing Application Center(LASAC),Mi...The Austrian node of the Natural Resources Satellite Remote Sensing Cloud Service Platform was established in 2016 through a cooperation agreement between the Land Satellite Remote Sensing Application Center(LASAC),Ministry of Natural Resources of the Peoples Republic of China and the University of Vienna,Austria.Under this agreement panchromatic and multi-spectral data of the Chinese ZY-3 satellite are pushed to the server at the University of Vienna for use in education and research.So far,nearly 500 GB of data have been uploaded to the server.This technical note briefly introduces the ZY-3 system and illustrates the implementation of the agreement by the first China-Sat Workshop and several case studies.Some of them are already completed,others are still ongoing.They include a geometric accuracy validation of ZY-3 data,an animated visualization of image quick views on a spherical display to demonstrate the time series of the image coverage for Austria and Laos,and the use of ZY-3 data to study the spread of bark beetle in the province of Lower Austria.An accuracy study of DTMs from ZY-3 stereo data,as well as a land cover analysis and comparison of Austria with ZY-3 and other sensors are still ongoing.展开更多
This paper serves as a brief introduction to this book,which includes 21 peer-reviewed papers selected fromthe joint worksho Pof ISPRS WGⅡ/1,2,7 and WGⅦ/6 on spatial-temporal modelling,spatial reasoning,analysis,dat...This paper serves as a brief introduction to this book,which includes 21 peer-reviewed papers selected fromthe joint worksho Pof ISPRS WGⅡ/1,2,7 and WGⅦ/6 on spatial-temporal modelling,spatial reasoning,analysis,datamining and data fusion(STM 05),held from 27 to 29 August 2005 at Peking University,China.The background to thisworksho Pis presented and the developments in spatial modelling,spatio-temporal modelling,spatio-temporal analysis,andspatial reasoning and data mining are briefly reviewed and the contents of the book are introduced.展开更多
文摘Fuzziness is an internal property of spatial objects.How to model fuzziness of a spatial object is a main task of next generation GIS.This paper proposes basic fuzzy spatial object types based on fuzzy topology.These object types are the natural extension of current nonfuzzy spatial object types.A fuzzy cell complex structure is defined for modeling fuzzy regions,lines and points.Furthermore,fuzzy topological relations between these fuzzy spatial objects are formalized based on the 9intersection approach.This model can be implemented for GIS applications due to its scientific theory basis.
文摘Cartographic visualizations have been known for thousands of years and have brought forth a wealth of different map projections and cartographic products.Yet,cartography as an independent science has been established only about 100 years ago and sometimes its position among the spatial disciplines is challenged by the scientific community.In this respect it is a young science based on a very long tradition of map making,globe production,and the development of map projections.Maps and map related visualizations play an important and indispensable role in many other spatial disciplines such as geography and geodesy.Cartography has many overlaps with these traditional disciplines as well as with the more recent ones of photogrammetry and remote sensing.This paper reviews fundamental aspects of the conception of space and time throughout human history,the historic development of cartography from a technique of map making to a spatial science,highlighting major milestones in the history of the discipline.As a young science and confronted with major technological developments in the late 20^(th)century cartography underwent several crises as to what exactly is cartography and how it relates to other spatial sciences,in particular to geographic information systems.Major pitfalls and misconceptions are discussed and the three major scientific pillars of cartography are identified.The relationships of cartography with neighboring disciplines are discussed and the position of cartography vis a vis the others is delineated.Finally,desirable future developments of scientific cartography are discussed.
基金This work was supported by the National Key R&D Program of China for Strategic International Cooperation in Science and Technology Innovation(Grant No.2016YFE0205300)as well as a grant under the Eurasia Pacific UNINET program of the Austrian Federal Ministry of Education,Science and Research to the University of Vienna(Grant No.EPU 32/2017).
文摘The Austrian node of the Natural Resources Satellite Remote Sensing Cloud Service Platform was established in 2016 through a cooperation agreement between the Land Satellite Remote Sensing Application Center(LASAC),Ministry of Natural Resources of the Peoples Republic of China and the University of Vienna,Austria.Under this agreement panchromatic and multi-spectral data of the Chinese ZY-3 satellite are pushed to the server at the University of Vienna for use in education and research.So far,nearly 500 GB of data have been uploaded to the server.This technical note briefly introduces the ZY-3 system and illustrates the implementation of the agreement by the first China-Sat Workshop and several case studies.Some of them are already completed,others are still ongoing.They include a geometric accuracy validation of ZY-3 data,an animated visualization of image quick views on a spherical display to demonstrate the time series of the image coverage for Austria and Laos,and the use of ZY-3 data to study the spread of bark beetle in the province of Lower Austria.An accuracy study of DTMs from ZY-3 stereo data,as well as a land cover analysis and comparison of Austria with ZY-3 and other sensors are still ongoing.
基金the National Basic Research Program (973 program,Project Name:Multi-resource and massspatial information integration,fusion theory and real-time dynamic updating,Project No.:2006CB701304)the National High Technology Research and Development Program (863 Program,Project Name:Spatio-temporal database technique andits application in geographical information management,Project No.:2006AA12Z214)+1 种基金the Chinese Academy of Surveying and Mapping,Wuhan Universitythe National Natural Science Foundation of China (NSFC) for their funding support
文摘This paper serves as a brief introduction to this book,which includes 21 peer-reviewed papers selected fromthe joint worksho Pof ISPRS WGⅡ/1,2,7 and WGⅦ/6 on spatial-temporal modelling,spatial reasoning,analysis,datamining and data fusion(STM 05),held from 27 to 29 August 2005 at Peking University,China.The background to thisworksho Pis presented and the developments in spatial modelling,spatio-temporal modelling,spatio-temporal analysis,andspatial reasoning and data mining are briefly reviewed and the contents of the book are introduced.
