The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Based on SLEUTH urban growth model and Technology of GIS and RS, the process of urban growth of Xinxiang City from 1989 to 2009 was simulated, and the process of urban growth from 2010 to 2050 was predicted. The result illuminated that SLEUTH model had a credible accuracy, and it could well describe Xinxiang city's extension to the southeast as a whole during 20-year period. The city's area increased...
Based on the advantages of single model in the field of land use simulation, This research construct a Markov-logistic-CA integrated model to reflect the land use change precisely considering both sides of macroscopic and microscopic factors. The conventional CA model is extended from two aspects including iteration times and conversion rules by Markov and Logistic respectively. Finally the integrated...
This paper introduces the concept of the two-phase seamless integration model (2P-SIM), which is a general model to describe and solve the seamless integration problem of spatial data in the distributed heterogeneous environment. The first phase of this model deal with the classify progress; after this phase spatial data participate in seamless integration is split into respective groups, each group...
In this paper, methods of statistical analysis, comprehensive evaluation and GIS spatial analysis will be used to explore a method for village distribution optimization. Process of village distribution optimization is divided as the following three steps. Firstly, development potentialities of villages are evaluated. Secondly, central villages and inferior villages are determined by means of GIS analysis...
The cooperative distributed geographic modeling has become a hotspot of Geographic Information Systems (GIS) research field. This paper introduces the architecture of the Cooperative Distributed Geographic Modeling (CDGM) control pattern based on Holon, studies the distributed control on the existing spatial data and the geographic models, which are gotten from different regions and belong to different...
A new methodology of mobile police spatial information service grid model is studied based on spatial grid computing environment. Key technologies are presented in the model, including spatial grid computing, mobile agent (MA) distributed computing, mobile geographic information system (GIS), global positioning system (GPS), video monitoring, transfer control protocol/internet protocol (TCP/IP), and...
At the age of post-Kyoto Protocol, international forestry carbon sequestration project not only has strongly achieved the form of harmoniously developing between economy and environment conservancy in developing countries, but also is promoting the relative research on theory and technology in Forestry Carbon Sequestration. And this paper has discussed that how to establish the Geo-Spatial Model of...
The sharing and interoperation of geographical information has always been a hot topic in the field of geographical information science, and the semantic similarity of the concept of geographic information is also an important factor affecting geographic information sharing and interoperability. The semantic similarity of concept calculation is a natural language processing, an important component...
Net primary productivity (NPP) estimation is an important study field of global change and terrestrial ecosystem. Here, we present an integrated modeling and analysis framework for researching climate change using NPP as an ecosystem indicator. It's brings together remote sensing, GIS and an ecosystem simulation model without requiring users to have any knowledge of any other specific software. Satellite...
With the rapid development of remote sensing technologies, the amount of the remote sensing image data is increasing dramatically. However, the remote sensing image data's usage rate still remains very low. To solve this problem, we propose a new Service model: Anytime-Anywhere Service (AAService) model, under which users can get remote sensing images anytime and anywhere. Then we implemented and...
Finite element meshes are the foundation of geographical mechanism and process model computation, with good geometrical adaptivity, triangular mesh is used widely in Geospatial computation. Considering that the geospatial objects mostly have lots of spatial constraints and complex boundaries, as well as the lack in study on finite mesh generation methods in geoscientific field, a finite triangular...
The symbolic database system is the basic tool of geospatial data representation in map. In the past, many researchers didn't focus on 3D map symbols but mostly on 2D map symbols. In 3D GIS, all geographic phenomena and spatial entities need to be represented by the corresponding 3D symbol models. So establishing a complete set of 3D map symbolic database with expression becomes critical in technology...
Three-dimensional entity model is the base of visualization and application of true 3D GIS. Nowadays, digital terrain model of aboveground spatial data with various scales and resolutions is much more convenient in building digital city. However, it is difficult to build efficiently 3D body model based on huge amount of underground spatial data that is unstructured and very complicated. This paper...
Locality description is the most common spatial activity in everyday life, and is decided by the spatial cognition. In spatial cognition, spatial knowledge is often structured hierarchically and results in the hierarchical locality descriptions. In this paper, we propose the structural hierarchy of spatial knowledge based on landmarks and topological spatial relationship of disjoint, and present two...
Large scale three-dimensional spatial data of underground and aboveground entity has features of different shapes, uneven spatial distribution and complicated spatial relationships. At present, the single spatial index structure can not satisfy the large scale three-dimensional spatial data organization and management. Especially for the index of the elements with information retrieval LOD, its efficiency...
This paper presents a quantitative method for mineral exploration combining of the three multi-class geological variables aided by GIS spatial analysis techniques and statistical analysis. The process of constructing a mineral potential map based on extended weights-of-evidence modeling to investigate the relationship between multi-class evidential map patterns and known gold deposits in the Wulonggou...
BACKGROUD: Since Mexico reported the first case of Influenza A H1N1 influenza patients in March 2009, Influenza A H1N1 flu spreads rapidly around the world and threats seriously to human health. OBJECTVIES: (1) Establishing an Agent-based Model (ABM) of H1N1 transmission, simulating and predicting the distribution of location, extent and development of the law of H1N1 to explore the space-time propagation...
The aggregation of the topological neighbouring polygons developes well. There are some good algorithms, but the most are based on the topological spatial data model, it requests data build integrated topological relations. When the data is modified, we should vindicate the data's consistency, and it will cost so much time to rebuild the topological relations and even sometimes maybe failed. This...
An improved overlay analysis algorithm based on monotone chain and STR (Sort-Tile-Recursive) tree index is introduced. The algorithm can save the time for vertex listing and intersection point computation, also the memory space. Making full use of the function of overlay analysis for simple features, as many as possible nodes of the polygon can be filled in the STR tree index structure. The algorithm...
In order to construct a user-friendly intuitive landscape system of Anze, based on the existing map library of Anze County, first of all, we use ARCGIS software platform to generate two-dimensional, three-dimensional landscape, and then build landscape system of Anze adopting ArcEgine. In this project, it combines GIS application and GIS developments, meanwhile, it achieves a very good visual effects...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.