Applied Mechanics and Materials Vols. 170-173

Abstract: After making deep analysis of the geospatial data organization mode, data clipping, data extraction, data mosaic of terrain original data, which are based on geospatial database theories such as ArcGis, GeoDataBase, are studied in detail. This research, beneficial for sharing and inter-operation of spatial information, makes it possible the realization of the three-dimensional visualization in Yuntai Mountain area of Jiaozuo.

Abstract: The powerful tool of GPS-InSAR integration is drawing more and more attention in deformation monitoring. This paper introduces firstly method of atmospheric corrections and orbit errors to InSAR images using GPS datas. Then, the scheme of GPS-InSAR data integrating is expounded, Finally, Analysis and examples prove that GPS and InSAR technology has highly complementary. On the one hand the GPS provides good approach for resolving sensitivity that the InSAR opposite to atmospheric parameters change and the orbit error correction, on the other hand, we can use GPS technology to raise the InSAR spatial resolution , and are able to monitor surface deformation in millimeter-level precision. Therefore, using GPS-InSAR integrated technology will break through the technical limitations of a single application. They play each of their respective advantages, which greatly improve the resolved capacity in space domain and time domain, so as to provide better services to monitor the surface deformation.

Abstract: High resolution remote sensing images generally refer to image to the spatial resolution within 10m aerospace、aviation remote sensing images. The emergence of high-resolution images strengthened the ability to recognize the large scale features, especially for the extraction of houses information in mining area. High spatial resolution image has rich delicate texture feature, it is urgent to solution the problem of how to extract the features. The technology is very useful for statistic houses information、village relocation assessment and research of pressure coal status, providing important data basis for village relocation, statistics, assessment. Taking henan as a mining area for example, houses information extraction methods are discussed. This paper mainly research contents as followings: It is combined with the space texture information of high resolution imaging rich, using different methods to extract building information, including followings: First, ordinary image segmentation technology; this method is simple and feasible, but extracted housing information is not accurate. Second, the object-oriented method of feature extraction technology, visualization degree and extracting accuracy of this method is higher; Third, it has conducted the preliminary height extraction of the houses; according to the solar altitude angles and the shadow of the houses to calculate the height of the houses. And considering the influence of undulating terrain, using the terrain DEM data to analyze study area, finally determined the shadow length, and then used solar altitude angles to calculate houses height. Based on the verification, accuracy evaluation results show that houses contour information extraction accuracy is: accuracy of the number and area is over 80%, the total rate of wrong classifications is lower. Houses highly information extraction accuracy is within the 85%. The research methods are effective.

Abstract: Coalfield control survey results are work foundation of coalfield construction and whole engineering surveying and initial data of coalfield-exploration surveying and mapping. Digital information management system is an inevitable trend to coalfield control-survey data digital management. The paper introduced the design of information management system of control point results in coalfield geodetic survey based on GIS. It contained the system architecture, function module, safety management module and others. The realization of the system can make standardized management, information processing and sharing, and security of coalfield geodetic survey results effective improvement. It has an important meaning and strong practical value.

Abstract: The two kinds of statistical process control algorithms for detecting the small displacement shifts in the monitoring data obtained by the Global Position System (GPS) receiver are comparatively studied in this paper. The Shewhart and Cumulative Sum (CUSUM) charts are applied to the simulated and the experiment GPS coordinates, and their effectiveness in detecting the small and large persistent shifts are evaluated. The result shows that the Shewart chart is useful in detecting large shifts in GPS real-time data, but it can’t find small shifts. The CUSUM chart appears to be an ideal candidate for detecting the GPS coordinate changes in deformation monitoring since it can detect the small and persistent shifts hidden in a GPS time series data.

Abstract: To manage the campus space information effectively, and provide faster query and browse function to user, a straight line optimization algorithm was proposed. The algorithm regards the target node’s situation and direction as constraint condition when searching map nodes in road network. The algorithm can reduce the number of searched nodes and increase system-search velocity. To prove the algorithm’s practical application, a small campus geographical information system is built on a component geographical-information-system development platform. In this system, the algorithm is used to simulate searching the shortest path between two desired nodes. The simulation result indicates that this algorithm can search the path quickly and reliably.

Abstract: With constant expansion of GIS application，more sophisticated technology for its data processing for GIS is required. For traditional GIS platform, the users are provided with functions for geographical data processing and space operation that are bound by an order. With development of COM, ArcGIS 9 Geoprocessing allows users to build model for process neatly, and achieve the customization of functions for geographical data processing and space operation as well as combination with relevant technologies. ArcGIS 9 Geoprocessing is based on the automatic generation system for weather thematic map, which may build a model with Model Builder, connect the database, analyze and calculate the thematic maps through the running of model, so as to realize a conversion from data to graphics, and meet the need of meteorological departments for data.

Abstract: In technology, Surveying and Mapping network computing platform integrated the Surveying and Mapping calculated functions and to achieve a network share, users can easily realize the calculations in network, the computing platform also changed the single plane version software’s original data storage mode; in applications the platform can be provided to the education sector as well as Surveying and Mapping related research and production units; Surveying and Mapping network computing platform model is also beneficial to the industry standard of unity.

Abstract: The set up of Web-based Surveying and Mapping data processing center, not only conducive to the standardization and modularity of Surveying and Mapping data processing, but also help the management and use of data, making the data providers and users no longer subject to geographic areas restrictions; at the same time as using the B/S (Browser/Server) architecture network platform, users avoid the installation process, saving the user's system resources.

Abstract: The data for establishing digital basin has the features of large quantity, heterogeneity and multiple dimensions. Determining how to effectively manage and share the data is the key for digital basin. This paper shows an information sharing model for digital basin based on metadata directory, Service-Oriented Architecture (SOA) and publishing/subscription technology. And then, for easily transmission, we preliminarily accomplish the data conversion based on Geography Markup Language (GML).