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In this paper, land use/cover change (LUCC) from 2000 to 2010 in the region of Nanjing is studied, based on Landsat TM remotely sensed images in 2000, 2005, and 2010. The results showed that: from 2000 to 2005 and from 2005 to 2010, the area of construction land increased by 404.15 km2 and 635.36 km2, respectively. The farm land decreased by 105.49km2 and 210.7 km2, respectively during the two periods...
Nowadays, eutrophication of the receiving waterbodiesis a serious problem worldwide. Increased production of algae can result in undesirable effects on water quality, biodiversity, and health. Thispaper givesan introduction to contaminated characteristics, side-effects, and various methods of eutrophication in waterbodies, and discussion of in situ bioremediation to control eutrophication. The study...
With the frequent occurrence of marine oil spills, there is a growing demand for analyzing and publishing oil spill disaster information. It's a trend to research on the Open GIS based spatial information analysis and publishing. This article develops the Marine oil spilling monitoring information analysis & publishing system based on DotSpatial, the upgrade version of the open-source .NET development...
In recent years, China has paid more attention to the development of careersregarding oceans. Marine enterprise obtained the corresponding development. However, there wereoften natural disasters oraccidents at sea, such as green tide, sea ice, or oil spills. The marine monitoring department in China tracked, monitored and forecasted disastersand accidentsby GIS and satellite remote sensing technology...
SMCE (Spatial Multi-criteria Evaluation, SMCE), is a multi-criteria decision making model within a variety of geospatial information. In urban construction and planning, many decision-making problems are multi-criteria spatial decision problems, such as the location of urban public facilities, the location of the urban residential area. Using the SMCE model and GIS technology, this paper proposes...
Reducing emissions from deforestation and forest degradation, plus conservation of forest carbon stocks, sustainable management of forests, and enhancement of forest carbon stocks, is a set of steps designed to use market and financial incentives in order to reduce the emissions of greenhouse gases. The paper addresses the role of satellite remote sensing technologies as a tool for monitoring, assessment,...
GIS system is excellent at digging out and utilizing information of space, being able to collect, store, manipulate, retrieve and display space information recognized by position. GIS not only provides decision-makers with related information concerning location and distribution of public facilities, but also provides a nice visual tool to describe the background and structure of a problem. The most...
Three-dimensional(3D) virtual environments and immersive simulation can be used to improve students' understanding of complex material in the science curriculum. Virtual field practice or virtual field trip (VFT) has become popular with both university students and teachers as a means of learning and teaching during the last decade. The paper presents 3D construction and visualization of complex geologic...
AIRS, GOSAT and SCIAMACHY are all very important remote sensors in observing atmospheric CH4 concentrations, and produce different observation data which have their own advantages and disadvantages. Therefore, it is important to decide which atmospheric CH4 production is more agreeable to the surface monitor of CH4 concentrations. Taking the WALIGUAN (China) site for example, correlation analysis...
Using Landsat TM/ETM+ images acquired on July 31, 1995, August 27, 2002, and September 18, 2007, the brightness temperature was retrieved. Built-up areas were extracted from images by combining normalized difference building index (NDBI), supervised classification, and unsupervised classification method. Meanwhile, their temperature was calculated. The heat island intensity of built-up area in Xichang...
Estimation of soil properties in an un-sampled location is generally calculated with observation values of a number of neighbors around the un-sampled location to reduce the computational complexity. The more similarity there is between the neighbors, the better prediction at the un-sampled location. In this paper, we proposed a spatial homogeneity-based interpolation algorithm, which finds more similar...
The integration of hydrological models, GIS and RS are the inevitable trend of future development of hydrological models. This paper summarized the research progress of hydrological models, analyzed the applications and development of GIS and RS in hydrological models, pointed out the problems and settlement, and then proposed the future development and trend of hydrological models.
Using spatial analysis, multi-source data, an on-site investigation, this study carried out an integrated eco-zoning in the Huaihe River Basin (HRB) based on the spatial heterogeneity of geographical environment and ecosystem as well as human impacts. The HRB was divided into 4 eco-zones and 8 sub-eco-zones, each zone with its main ecosystem services, eco-vulnerability or eco-sensitivity. Spatial...
The complexity of LUCC (Land Use / Cover Change, LUCC) determines that it is important to conduct the study of LUCC using complex system theories, in particular by the establishment of a mathematical model for complex systems. In this paper, the LUCC model was built based on GIS technology, CA (cellular automata) and Agent technology. Firstly, Landsat TM data of 2000 and 2010 are used to obtain the...
In this paper we propose an efficient Large-scale terrain visualization system in a cluster environment. Firstly, we implement level-of-detail (LOD) building in parallel, with an obvious time saving compared with a single-machine environment. The LODs are then stored in the server. While rendering, clients get LODs on demand. LODs are organized with a scene graph structure, thus view frustum culling...
In order to solve the ill-conditioned problem in GPS rapid positioning, an improved algorithm for ADPAM was proposed. By computing the optimal mirror plane, this algorithm achieved a maximized angle between the projected epoch subspace and its adjacent epoch. Thus, the optimization of ADPAM is implemented. For illustration, a measured GPS example is utilized to validate this algorithm and the results...
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