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Uncertainties from aerosol type greatly affects the accuracy in water color remote sensing for case II waters. An algorithm, depicted as ACCIA, dedicated to define the aerosol types over case II waters is developed by iterating the four critical component concentrations in an aerosol type: dust like, water soluble, oceanic and soot. A software function module is also developed in Visual Studio 2010...
Terrain visibility analysis is widely used in many areas, but the existing methods still have some unsolved problems, such as complexity in computation and bad applicability. In this paper, a depth mapping based method is given to solve the problem. First, the terrain was rendered with perspective projection from the observation point, and the depth of the terrain surface was saved into a depth map...
Total digital mapping system should be qualified for the functions of GIS and map publication. In other words, it can deal with kinds of geographic data and can make different type of maps. In this paper, some questions are raised that we should think over before the data model is built up that based on the analysis of the system feature. After that, a new data model frame of the whole system is put...
The remote sensing image fusion technique has been developed quickly and applied, which is an important remote sensing research topic. How to choose the right fusion method is one of the challenges that the field face. PCA, Brovey, IHS and Multiplicative are used to fuse QuickBird and SPOT5 low-resolution multispectral and high-resolution panchromatic images. The fused images are analysed and evaluated...
Area properties of mapping region has important impact on expressive effects of color grading symbol, which is mainly reflected in two aspects: firstly, color's area proportion in mapping region will affect the strength of visual impact from color, which can influence maps' clarity and comfort; secondly, area difference between different classes will affects visual perception caused by original color...
Texture is an important element for visualization of 3D city models and often takes a big proportion of the total data volume. In order to simplify 3D city model textures for dynamic visualization in different scales, a multiple representation data structure, TextureTree is proposed to store building textures in different LoDs. First, the texture image is iteratively segmented by horizontal or vertical...
Large-scale man-made linear features has played more and more important role in modern life and the development of urban are seriously affected by the subsidence of them. Permanent Scatterers (PS) technology was developed as a powerful tool for subsidence monitoring. High resolution of 1m data can be provided by TerraSAR X-band (TSX) with a short revisit period of 11 days. More detail and sensitive...
This paper briefly describes the conception of map aesthetics research, and concludes the aesthetics characteristics of map. Then the aesthetics characteristics of map in information time are expatiated by comparing the differences between paper map and electric map. This research may supply some valuable references for aesthetics study of map in the future.
This paper aims at developing a fusion method based on SVR (Synthetic Variable Ratio) to preserve spatial details and spectral characteristics in image fusion processing, coupling several experiments are conducted for different kinds of sensors (ETM+, QuickBird), and fusion performance evaluation results show that this method is not related to sensor type, spectral region of images and number of multispectral...
To solve the factual problem that Google Maps API can not provide directly the function of building range thematic map of GIS, this paper builds indirectly range thematic map by means of the combination use of the other class and methods provided by Google Maps API and XML technology, ArcGIS spatial data disposal technology and so on. The build idea, method are discussed in this paper in detail. To...
TSR (Traffic sign recognition) is an important research field in ITS (Intelligent traffic system), which is being paid more and more attention for realizing drivers assisting system and automated navigation etc. Author proposed a new method to detect traffic signs in outdoor scene. The method is divided into 2 step. Firstly, Two-way integration method including both methods drived by task and methods...
This study compared four image fusion techniques for mangrove studies in the Beilun estuary, Vietnam. The fused image was generated from an ALOS multi-spectral image scene and a Quickbird panchromatic image scene. Four quantitative indices (i.e. mean, standard deviation, entropy, and correlation coefficient) were used to compare and evaluate the results of the fusion methods. Variation of fusion effects...
Currently, with many popular GIS software platforms occurring, interoperating data in different platforms has an important application value. Taking MIF data for an example, which is the Interchange Format of MapInfo, this article puts forward three ways of MIF data interoperability in ArcGIS platform through the analysis of data format of MIF, namely interoperated Quick Import tool for calling data,...
Signal to noise ratio (SNR) with time delay integration (TDI) set is of great significance to the satellite remote sensing (RS) system dedicated to the monitoring of lake water color. The technical requisites were set in this paper taking reference to the Sea-viewing Wide Field-of-View Sensor (SeaWiFS), which was aboard on the SeaStar. We simulated radiative transfer process from Taihu Lake water-leaving...
For the demand of the thematic maps' specialization, knowledge-base and quick design and producing, thematic maps' production platform, mode and technique are all changed more intelligent. As a hard core, the knowledge base is very important in decision support function. Based on different use, for different users' arrangement and covering all different scales in thematic map's intellectualized fast...
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