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This study developed a method for Soil Organic Matter (SOM) mapping in a lithoidal mountainous area using a stratified strategy under fuzzy inference framework. Environmental variables derived from terrain analysis and remote sensing incorporated with a small number of field samples were used to predict spatial variation of SOM. A new variable, bare soil ratio, representing the fractions of bare soil...
In traditional, the research of wheat stripe rust spreading mode was focus on the large scale meteorological propagation model. In this paper, we present a diagnosis and propagation model of wheat stripe rust in field scales based on Bayesian network, which can provides technical support for short-term accurate prediction and precision pesticide of stripe rust in small scale. Through the wheat stripe...
The urban heat island (UHI) effect is becoming an influential factor on the city's environment along with the rapid development of urbanization process. This paper uses Landsat-5 TM RS image of the year 1988, 2007 and 2010 based on NDVITEM model and land temperature retrieval method to obtain Beijing land surface temperature distribution map through digital image processing and land surface temperature...
In this paper, an approach is presented to rapidly create a satellite observation scheme in order to monitor natural disaster more efficiently. First, one needs to analyze observation requirement in order to reduce natural disaster, and select necessary satellites from all of satellites under the International Charter on Space and Major Disaster. Then, a satellite schedule tool, i.e. Satellite Tool...
Researchers agree that there are two main causes to sea-level rise: melting of land-ice and thermal expansion of ocean water due to global climate warming. However there exist several secondary causes that can result in sea level rise, which used to be ignored. In this study we firstly qualitatively analyzed several secondary reasons that can also cause sea level rise such as land reclamation projects,...
This paper has study the description and simulation computation methods of remote sensing information model, and try to propose a more available way to solve this problem. This paper presents our research works on the description and simulation methods of remote sensing information model: the service on demand method provides a basic methodology of model analysis, the semantic relationship description...
This paper presents the model contract and the model integration language, which is used for sharing and reusing geography models in a distributed geography modeling environment. The model contract mainly consists of three parts, the model external description information, the model internal structural information and the model execution flow information. Geographer can structure the model contract...
The design of execution engine based on web services for distributed geography modeling environment relies on model contract, model management environment, execution node, data center and control node. The execution procedure of geography model execution engine would be like this: first, geographers construct model contract according to the rule of model contract, and then submit the model contract...
Human geography is a phrase that is used to indicate the augmentation of standard geographic layers of information about an area with behavioral variations of the people in the area. In particular, the actions of people can be attributed to both local and regional variations in physical (i.e., terrain) and human (e.g., income, political, cultural) variables. For example, in disaster planning, response,...
The awareness about the changes occurred in our living earth has received a tremendous attention from a variety of research and application domains. For such missions, it is advantageous to take full advantages of the abundant geospatial data available in sharing environment. The diverse types and overwhelming volume of available georesource, however, impedes such expectations. This paper focuses...
The on-site command and rescue action after a destructive earthquake occurs will be associated with emergency requests of various information, such as the seismic and disaster information, the local population, economic and building distribution, the road traffic information, the rescue team and their action information, the relief material and equipment information etc. The effective management of...
This paper conducted some researches on 3D weather simulations on a 3D virtual earth GeoGlobe. The simulation area in this paper is ZuiYi city, GuiZhou province, China, and the simulated weather conditions are snow, rain and fog. This paper used Microsoft's DirectX 3D Technology and particle system to achieve the simulation, and used a public weather API to gather the weather condition.
This paper describes TerraHidro that is a distributed hydrologic modeling platform. TerraHidro is general purpose water resources system that presents a new concept to represent water flows based on graph structure, in the geographic information system (GIS) context. The drainage extractions and Amazonian basin delimitations using TerraHidro have been compared with ArcGis Hydro Tools regarding to...
In this paper, an algorithm is proposed that successfully segments buildings from aerial photographs, including shadowed buildings in dense urban areas. To handle roofs having rough textures, digital numbers (DNs) are quantized into several quantum values. Quantization using several interval widths is applied during segmentation, and for each quantization, areas with homogeneous values are labeled...
An efficient data sharing system is vital to Earth System Science (ESS) researches. However, current systems mainly focus on standards, policies and software environments. None of them pay much attention to spatial references. Adaptable Global Spatial Grid (AGSG), was selected as a unified spatial reference for data sharing. Methods of data representation based on AGSG was introduced and the mode...
A new geospatial data sharing/overlay system, CEReS Gaia, has developed. The purpose of the system development is to promote land surface environmental studies. Since existing databases do not meet the requirements by academic users who wish easy data analysis by using his/her own data with existing other data, the new geospatial data sharing system has developed. The system has the following features;...
In this paper, disparity between different basic geographical feature classification and code regulations will be handled. Each regulation is regarded as a conception model, and a common conception model for all the regulations is firstly constructed based on the conception lattice technology. And then, the mapping between the original conception model and the common conception model will be mined...
In 3D digital urban planning applications, a model file may contain multiple building models, however, a single model or model component are very often needed to be used and operated independently. This paper studies a model segmentation strategy to extract a single building models or model component via model segmentation according to a specified rectangular range. This paper used Microsoft's DirectX...
In this paper, a numerical method for calculating the wideband, low-frequency, eddy-current response of a metallic body-of-revolution is described. Solutions are given in a modal decomposition that can be related to the discrete spectrum of relaxation frequencies and the measured magnetic polarizability dyadic. Calculated responses are compared with the analytically known solution for a sphere and...
Polarimetric GPR requires accurate calibration of channel imbalance and crosstalk not only in the amplitude term but also in the phase term. Currently, there have some calibration techniques. Though these techniques are very easy to perform, they provide less accurate calibration results for the crosstalk. To improve on the accuracy of calibration, we have developed a mathematical formulation to calibrate...
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