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In recent years, the development of high-resolution remote sensing image extends the visual field of the terrain features. Quickbird and other high-resolution remote sensing image can show more characteristics such as shape, spectral, texture and so on. Back Propagation neural network is widely used in remote sensing image classification in recent years, it is a self-adaptive dynamical system which...
Emergency response models for emergency events have been studied widely by scholars at home and abroad in recent years. The major consideration in these researches is the elements involved in the emergency response phase, which do not consider the lifecycle of emergency management. According to the characteristics of different stages in the lifecycle of emergency management, this paper constructed...
This paper describes the design and implementation of Regional Land Information Integration Model (RLI2M). RLI2M is used to solve the problems of land business systems' incompatibility in China due to numerous rigid land resources management laws and regulations. By separating the fundamental geo-spatial data and land business data, this model can bring out various business applications on one map...
Monitoring and assessing land degradation is important to local sustainable development in Guizhou province, Southwest China, where limestone distributed about 61.7 %. Using the 1 km Advanced Very High Resolution Radiometer Normalized Difference Vegetation Index (AVHRR/NDVI) data (1992-1993) and 500 m, Moderate Resolution Imaging Spectroradiometer Normalized Difference Vegetation Index (MODIS/NDVI)...
The work presented in this paper is an attempt to bridge two co-existing realties: Semantic information and MultiAgent Systems, the aim is to provide multi-domain experts or users with uniform semantic interoperability framework in heterogeneous distributed environment. We focus on the domain Ontology's original data source remote sensing imagery, bridging gap of the high-level semantic information...
In this paper we present a novel approach which will update the disaster area by photos taken by normal camera in three-dimensional environment. Normal photos don't contain any spatial information so it is hard to update the photos to the right area directly. In this paper we utilize an alternative method to obtain the spatial information which will construct a viewing frustum by the position and...
The analysis of Land-use change trends and its driving forces is one of the hot issues of global change research, the core of research is how to forecast the tendency of land-use change reasonably and accurately. The dynamic land-use change is very complicated, the traditional GIS method can solve part of the spatial correlation problem well, but it is hard to simulate complex dynamics in spatial...
This paper presents a new classification method based on a combination of GIS and BP (back propagation) artificial neural network, taking the TM image of the area of Jinzhou city in 2000 as the testing one. BP neural network can be optimized by means of selecting GIS data aided training sample, improving training algorithm, calculating the number of nodes in the hidden layer and so on. Compared with...
Classification is one of the most important procedures in high-resolution remotely sensed image information extraction. This paper introduced Adaboost-SVM algorithm to IKONOS image classification. The classification performance of Adabost-SVM and single SVM were quantitatively analyzed and qualitatively evaluated. The results show that: In the case of small training samples, Adaboost-SVM outperforms...
The paper first presented the general design and database design of Jinan urban flood DSS, it also emphasized input and output design of the flood simulation model. Then it carried on the elaboration for the key technologies of the system which included component technology, flood simulation model, automatical generation of flood briefings technology and status switching technology. Finally, the main...
Geologic hazards in mining area are geographic entities that change dynamically along with time. Their spatiotemporal data should be integrated in database for information management and further analysis. Spatio-temporal data model based on version-increment uses version and increment to express geographic entities and their spatial-temporal variations. Meanwhile, it records both states and events...
This paper presents a real-time three dimensional visualization system of the East China Sea, composed by an ocean model with volume rendering technology and a marine GIS system. In the system, the spatiotemporal marine data of East China Sea is retrieved from an ocean modeling called the Princeton Ocean Model (POM), which is a sigma coordinate, free surface ocean model with embedded turbulence and...
Gross primary productivity (GPP) and Net primary productivity (NPP) are key components of the terrestrial carbon cycle. In this paper, an improved light utilization efficiency model was used to estimate GPP and NPP in East China from 2001 to 2008. This model included two sub models: GPP model and respiration model. The data input into the model including remote sensing data: MODIS production such...
With the rapid development of Digital Earth System, vector data has been widely used as an important data model. Visualization methods to vector data on a Digital Earth System have got more attention. So far, the existing methods can be divided into geometry-based and texture-based approaches basically, and each kind of method applies to different areas with serious shortages in practice. For instance,...
The three dimensional spatial analysis applications of three dimensional GIS in Geology include slice up, palisade map constructing, virtual pit excavation, tunnel simulation etc. At present, these geological spatial analysis applications are implemented by distinct algorithm in different systems. However, those can come down to three dimensional Boolean operation between two spatial entities. Light...
The construction of three-dimensional digital city is an important application area of GIS technology, and construction of large scale city 3D building scene based on 2D building outline is a method to construct three-dimensional digital scene. This article makes a study of using ArcSDE to store the Shape files in SQL Server database, and then uses ArcObject to program the ArcSDE in order to gain...
Geospatial data is the core of spatial information system. It is always a research hotspot of how to realize the sharing and integration applications of distributed geospatial data. OGC has developed a number of web services specifications that enable the interoperation of heterogeneous geospatial data sources. Grid is the technology enabling resource sharing and coordinated problem solving in dynamic,...
The effective representation of thematic data in 3D GIS can not only visualize tabular data intuitively in 3D environment, but also enable users to analyze thematic data directly on 3D GIS platform, thereby facilitating the decision making process. This paper proposes a method for representing thematic data in 3D GIS. Three steps are included in the method. In the first step, user is required to input...
Digital watermarking is an effective technology for copyright protection, but the passive of traditional detection method limits the application of this technology for vector data in GIS. Mobile agent technology, which is a combination of artificial intelligence technology and network technology, has some obvious advantages that could solve this problem. This paper studies mobile agent technology,...
Because of increasing marine intrusion into the Pearl River Estuary (PRE) of South China, the salinity has become one of the important and necessary hydrological and water quality monitoring parameters. In this research, we examined the relationships between the reflectance from EO-1 Hyperion satellite imagery and water surface salinity based on the in-situ spectra analysis model of the river water...
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