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As a significant digital representation of terrain surface, varieties of DEM products have been available to the public. The most widely used global DEM products are SRTM and ASTER GDEM. Given the comparable horizontal resolution and vertical error, accuracy validation and comparison have been of interest since the release, however, usually on a wide range. In this paper, we presented the results...
A novel head-mounted projective display (HMPD) for vein imaging is proposed in this paper. The correspondent optical system is designed, which consists of imaging system and see-through HMPD. The infrared imaging system has a large numerical aperture with F number of 2.6, which is extremely conducive to receive and to image the weak reflected near-infrared light from the patient's skin surface. The...
Water pollution caused by tourism development not only occurs in water-scarce areas but also exists in the areas where water resource is relatively abundant. In this paper, the relationship between water pollution and tourism development in the Lijiang Ancient Town was discussed because there were no industrial or agricultural pollutant sources except the tourism pollution. Meanwhile, questionnaires...
Different water samples were collected in the Yulong Snow Mountain in Lijiang city, Yunnan Province from July 22 to July 28 in 2005. Characteristics of soluble ions had been analyzed to study the intrinsic mechanism of human-geosphere-atmosphere-hydrosphere in the study area. The results showed us obvious differences of soluble ion in these different water bodies, Lake water and groundwater in low...
Although the theories and methods about 3D GIS interactive editing are scarce and primitive, the need to develop them has become gradually urgent. For the purpose of resolving it, in this paper, a method on editing geographic features in 3D GIS visualization environment is proposed. By the digital control surface, the method can deal with some geometric shapes effectively such as point, path, and...
Based on the data obtained from face-to-face interview and the measurements using global positioning system (GPS) and geographical information system (GIS) technology, the village pattern evolution of the WL village in the middle of the Huang-Huai-Hai plain was studied. The main results are shown as follows. Firstly, the WL village goes through a series of evolution pattern including the absolute...
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