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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...
Detailed description of land use/land cover change of China during the past hundred years not only help us understand the impacts of human-induced land use/land cover change on climate change and carbon cycles, but also reflect the true role of land use/land cover change of China in the global climate change. Hence, this article tries to propose a methodological framework on the reconstruction of...
Following with the charting process of risk map, the paper designed and developed Risk Mapping Tool (RMT), which is based on Microsoft .Net platform and SuperMap 5.3 COM. RMT encapsulates seven modules, including Risk Mapping, Cartographic Generalization, Making Thematic Map, Map Sheet Management, Risk Map Database, Vector Data Analysis and Raster Data Analysis. RMT system has successfully provided...
This paper proposes a multi-orientated Observation technique of selecting the terrain characteristic point for relief generalization. The origin terrain points are organized into a suitable format and the 3D Douglas-Peucker algorithm is used to retrieve the most contributive ones. On the other hand, all those terrain points are projected into a limited space. In this pace, several groups of the origin...
Ground subsidence in mining area does not only seriously damage land resource, surface engineering project, ground facilities and the surrounding environment, but also badly influence people's work and lives and greatly hinder the economic development in the mining area. In this paper, D-InSAR technology is used to research the land subsidence trend of Tangshan City from the year 1997 to 2004. Analyzing...
The Grove Mountains (Grove) in East Antarctica is recognized as the important meteorite concentration area and has the notable meteorite concentration mechanism, being the basis to assess the possible concentration region in Prince Charles Mountains (PCMs) of the Lambert Glacier, East Antarctica. The meteorite concentration mechanism requires understanding of the glacial flow, the local climate, and...
A 3D reconstruction of scanning electron microscope (SEM) combining improved digital speckle correlation method (DSCM) was introduced into tool wear investigation. The 3D reconstruction was achieved from SEM stereo-pair by using photogrammetric surveying theory. An indentation with known 3D construction was used to validate the calculating results. The wear loss in tool wear test was calculated by...
In this paper, the application of GIS-based land suitability evaluation has been discussed, and then the key problems in the process have been analyzed, finally, we take Dujia village coal mine in ShanXi province, China as an example to exemplify the process of land suitability evaluation by GIS spatial analysis function.
Qinhuai River Basin is located in the lower reaches of Yangtze River. With acceleration of urbanization, the flood risk of basin has increased and threatened blood and treasure of people. Based on RS and GIS methods, the impact of urbanization on the flood risk was analyzed in space and time. The study showed that, 1) Urbanization aggravated the flood risk. The space distribution of urbanization and...
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