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Interpolation algorithm is one of the most important factors which influence on the accuracy of DEM. After interpolation method is confirmed, interpolation parameters are a primary cause for the accuracy of DEM. However, there are few researches on how interpolation parameters influence interpolation algorithm as well as the interpolation accuracy at last. In this paper, the interpolation parameters...
Compared to 2D navigation, 3D navigation requires much better performance of locating and heading. In an urban environment, the signals from a built-in GPS on a smart phone are always so weak that it causes considerably low position and heading accuracy. To address this issue and improve the user experience, two contexts, Navigation and Look-Around, are defined in 3D personal navigation. The following...
Land use/cover change which is one of the most sensitive indicators that echo the interactions between human activities and natural environment, has become a core issue in the global environmental change and sustainable development disciplines. In this study, we applied temporal trajectory analysis method to detect land use/cover changes in Baishan city. The available satellite imageries are Landsat...
Make full use of the characteristics of GIS spatial data, according to the actual situation of the shortest path between any two Distribution Points, achieve optimal path selection in GIS platform. In this paper, MapInfo software as the design platform and MapBasic as the development of language, the system design has modules: User management module, the delivery information management module, the...
This paper provides a new solution to manage and display the massive LiDAR point cloud data based on virtual global platform, either airborne or terrestrial LiDAR data, which helps understanding the overall conditions of the collected data from different sources. Given overall consideration of management and virtualization, the study designs the out-of-core multi-resolution data structures. The structures...
Obtaining the quantitative positioning space-based demographic and socio-economic information has the significance on assessing resources, environment and disaster. This paper presents a dynamic modeling method for rural GDP statistics data spatialization based on neural network Selecting Fangshan District in Beijing, China as the study area and taking villages as studying unit, this paper analyzes...
Integrated with spatial analysis, GIS can meet all kinds of requirements from decision-making support. PostgreSQL and PostGIS provide a favorable platform and powerful database solution for geospatial data analysis, and enhance the storage of spatial data management capabilities. PostgreSQL can provide dynamic and real-time spatial query and analysis. GIS spatial query and analysis are achieved in...
Geographic stereo video includes both spatial and temporal geographic features acquired through ground-based or non-ground-based cameras. This paper aims to design and develop the geographic stereo video web service system. Firstly, the paper reviews on the state of arts of geographic video and geographic stereo video, analyzes the REST architectural style. The application requirement of geographic...
Snow is one kind of special underlying surface which has high reflectivity, low thermal conductivity and snowbroth hydrological effect, Xinjiang Uygur Autonomous Region in China is a snow-prone area, hereafter referred simply to Xinjiang area, frequent snow disaster leads to local people's production and life affected, so accurate monitoring of snow has very important significance. This paper describes...
This paper is based on the international and national study of the theory and the evaluation method of the life quality, and combining with the actual development characteristic of all the districts in Beijing to build a evaluation index system of the residents' life quality in Beijing — with 32 basic index (for 3 levels). Then four principal component factors of the life quality are extracted via...
In this paper, we study the methods of constructing place-name ontology of Beijing based on attribute properties and spatial relation properties of place-name entities from the perspective of spatial cognition. Firstly, we locate place-name entities in the coordinate frame of Beijing city qualitatively and define the concept of place-name entities combining with the types of them. And then select...
The paper employs Stochastic Frontier Approach to analyze the allocation efficiency of R&D resources in 31 countries by Frontier 4.1 software. It reveals that U.S.A, Japan, Germany and Britain are the big power of R&D input and output, yet their R&D efficiency is not so high; Switzland, Sweden, South Korea, Canada and Australian have the highest R&D efficiency, and the R&D efficiency...
At the micro-level, certain spatial coupling relation is existed between peasant household livelihood behaviors and environment dynamic changes. This paper from object of study, study methods and development of relevant research etc reviews the research on environment transformation and peasant household anti-poverty livelihood behaviors, and sums up the feature and problems by now, and based on that...
Recently, many cities in China have developed geographic information public services platforms to assist decision-making and facilitate the life of citizens. However, the disadvantages of the traditional platform are more and more obvious. In order to address these challenges and deficiencies, we propose a cloud computing architecture for the geographic information public services platform, which...
Rainstorm waterlogging is one of the most frequently occurring hazards for most cities in China, which causes a great impact to urban life and social development. To perform rainstorm waterlogging disaster simulation, based on the advantages of remote sensing, an alternative integrated model was presented from hazard assessment, vulnerability assessment and exposure analysis on the basis of meteorological...
With the development of the city and the increasing personal cars, the parking difficulty has been a general problem in the urban traffic. Some Urban Parking Guidance Systems (UPGS) have been established that contain roadside changeable message boards. However, those general UPGS can't provide personalized services, can't combine with the electronic map, can't show enough information. Additionally,...
In this paper, we present a new method for dynamically profiling land use pattern and generating Origin-Destination matrices from millions of individual mobile phone traces. It is based on analyzing individual anonymzed mobile phone call records. Starting from these records, we systematically analyze the different signals received from the cell phone towers and identify the key feature associated...
Industrial districts have attracted substantial international scholarly attention. Nevertheless, the spatial evolutionary pattern of industrial districts still needs further investigation. Based on statistical data of the basic unit census in 2001 and the firm database of Yueqing Bureau of Industry and Commerce in 2009, the paper uses GIS analysis to analyze the spatial evolutionary process of Yueqing...
With the development of Voronoi theory and algorithm, more and more attention was paid in the application of Voronoi in Cartography. In this paper, Voronoi Diagram and its applications were briefly introduced at first. Then the author focused on its applications in Cartography from the identification and extraction of map information, map generalization, automatic name placement and other aspects...
Typhoon disaster is a complex system in which the environmental possibilities with hazard (EPH) and the bodies bearing disasters (BBD) are various. And different disasters caused by typhoon not only have their own laws of occurring, developing and turning into disasters, but also have explicit relationships among them. As a modeling tool describing concepts on semantic and knowledge level, ontology...
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