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Clouds are integral part in 3D-GIS visualization, without them 3D scene seem unrealistic. The paper presents a technical framework to simulate clouds from macroscopic to microcosmic scale in Global 3D-GIS. In the case of the macroscopic scale, which means the viewpoint is far away from the 3D scene in 3D-GIS, cloud was expressed with semi-transparent planar texture. In other case, we consider the...
Complex relationship and multi-level massive of spatial data need to be expressed in forms of better visual conception as new cartographic visualization methods show up. Definition of traditional thematic maps is so strict that limits the expressions, so a new confine of definition that we call it “geo-infographics” is defined. It includes both traditional thematic mapping and new expressions referring...
With the rapid development of rural socio-economic in China, multi-source statistical information is one kind important data to enhance decision-making for government. The rural has become a major problem. In this paper, a set of GIS spatial analysis methods of rural social-economic data were proposed and researched on, spatial data and statistical data were integrated to create a comprehensive spatial...
By using traditional statistic quantile method, Geography Information system (GIS) analysis and spatial autocorrelation statistical techniques, this paper calculated the grid population density, detected the trend of population distribution, studied the spatial relationship and characteristics between prefectures through spatial autocorrelation statistical techniques. The conclusions are got from...
Area properties of mapping region has important impact on expressive effects of color grading symbol, which is mainly reflected in two aspects: firstly, color's area proportion in mapping region will affect the strength of visual impact from color, which can influence maps' clarity and comfort; secondly, area difference between different classes will affects visual perception caused by original color...
Psychological suggestion is an educational approach that exerts influnce on the educated people's psychology and behavior in teaching. This paper analyzes the problems that exist in GIS teaching, such as difficult understanded teaching contents, poor interactive teaching, dry class atmosphere, and takes the cartography knowledge as the breakthrough point and applys the positive psychological suggestion...
Supported by coordinate multiple view (CMV) environment, triple-space is discussed in our previous paper [1]. In this paper, using eye movement technique, an evaluation work is discussed to understand whether the concept of triple space can help user to find their work space, and guide the users to find the answer easily and efficiently.
The construction for thematic map symbol is a very complex and intelligent process. This symbol can be automatically generated and easily shared on the web through the syntactic characteristics of statistical indicators and cartography visualization. This paper expounds the symbol types, inner structure and its design pattern. And a syntactic construction theory based on phoneme (thematic map primitive)...
The application of the shortest raster distance algorithm in Euclidean space without obstacle is unsuitable and inaccurate in real geographical environment. A new efficient algorithm is presented in this paper which aims to obtain shortest Euclidean distance in a space with multiple point sources and polygonal obstacles based on raster data model. First the turning points on the routes are defined...
According to the lower Yellow River mathematical model features, the paper presents the water and sediment data model based on the object-oriented data modeling method. By anglicizing various data types, defining the properties and their relationship, this model can adapt to the lower Yellow River mathematical model features. Taking the river part from Huayuankou to Lijin as the experimental zone,...
In a prior study, a rank mobility index (RMI) was applied to China's 137 urban agglomerations and mapped using a graduated symbol map to show dramatic changes in China's urban hierarchy from 1985 to 2005. This paper improves the visualization of those rank changes by applying advanced spatial analysis techniques. We use a Moran's scatter plot and a Getis-Ord Gi to examine the regional difference and...
Based on GIS, Bayesian networks, using object-oriented programming idea, exploratory conduct coalmine hazard monitor control and early warning research, developed visual management system of dynamic digital ventilation network (DDVS). In this paper, coalmine hazard monitor control and early warning study is focused on ventilation, gas control, fire control and dust control. The DDVS system is developed...
The street space plays an important role in urban fabric studies. However, it's difficult to draw continues contour line of the street space because of the gaps between the dispersed buildings, especially in China cities. The paper developed a new method to extract the street spatial outline and indentify the perceptible street space with the cumulative viewshed analysis in GIS. Through the cases...
TSR (Traffic sign recognition) is an important research field in ITS (Intelligent traffic system), which is being paid more and more attention for realizing drivers assisting system and automated navigation etc. Author proposed a new method to detect traffic signs in outdoor scene. The method is divided into 2 step. Firstly, Two-way integration method including both methods drived by task and methods...
Visual analysis of architectural landscape plays an important role in the urban construction process. This paper using virtual reality technology, constructed the 3d scene of urban architectures. And the simulation system provides the intuitive, convenient analysis tools and methods for visual analysis. Some vision quantitative issues about geometry space and color space of architectural landscape...
A rapid visualization method of GIS vector data on 3D terrain is proposed in this paper, including the organization of 3D vector data based on a quad-tree structure, the way to spatialize 2D vector data with terrain matching and methods to render a large amount of vector objects in a 3D scene. In the preprocessing procedure, vector data is extracted into different levels of detail using a simplification...
In this paper, we focused on the application of information technology in coastal construction in order to find better solutions to solve those problems in it. By using the related methods of information technologies including Computer Technique, Geographic Information System and Remote Sensing, we first completed the classification, analysis and processing of geological data which are involved in...
Multiple and esthetical diagram design in thematic atlas needs a harmony between graphic complexity and visual legibility. For better user cognition on map diagrams, a conceptual model of ‘re-visualization’ is schematized to define secondary explanation of original visualizations by visualizing their structure and meaning. So two alternative solutions are then proposed based on Flash architecture...
The quality of the interaction design of multimedia maps restricts the transmission efficiency of the spatial information. Based on the “user-centric” concept, this paper analyzes the factors that affect the interactive efficiency of multimedia maps. Then from the perspective of the user experience of the multimedia presentation system, the article discusses the principles and methods of the system...
The paper researches the land use investigation by using aerial photography which obtained by the high resolution CCD. It discusses the method to interpret land use in Liugou of Penglai and use the parallel relation between digital orthophoto(DOM) and features to analyze the condition of land use with with 3S technology to expression in detail. It will provide scientific and necessary references to...
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