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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...
Most of cities in the world like Shanghai have a large number of underground facilities including public transport and commercial facilities such as shopping malls, subway, parks, etc. The safety of underground spaces has become a very important aspect of urban safety. Underground facilities are very much vulnerable to waterlogging disasters. Urban waterlogging disasters have been causing havoc to...
Crop planting area is significant to agricultural structure adjustment and regional food balance policy. Based on field investigation and spectral property analysis of corn in HJ1-CCD images, different threshold configurations are set to build decision trees and corn planting area is precisely extracted utilizing multi-temporal HJ-1 CCD images in Zhecheng county, Henan Province of China. Both statistical...
Guam, USA has been facing drastic landscape change since World War II, especially when President John F. Kennedy lifted the Naval Clearing Act which opened Guam's ports to domestic and foreign visitors in 1962. Extensive construction activities in 1970s and 1980s changed the land cover in Guam, particularly the central and northern parts of Guam a lot. This research is focused on determination of...
Soil moisture is an important factor for agricultural production and drought monitoring, and soil moisture retrieval for Tibetan plateau has an important practical significance for global climate change and flood monitoring. In this paper, the radiative transfer progress is built to measure the exchange from the soil surface to vegetation. In order to retrieval the soil moisture, the vegetation optical...
Temperature-Vegetation Dryness Index (TVDI) is the most important index in describing the soil moisture. Available TVDI calculation depends on the remote sensing data and computational algorithms. With a partial updating of the algorithms and remote sensing data, it needs to recompile and redeploy the implementation of the TVDI calculation, which contains duplicated work and can't take full use of...
This paper presents a method that apply shape context features to identify building from high remote sensing image automatically. This method use adaptive algorithm of key point detection to detect the key point of building boundary rapidly. By eliminating the unstable points, the stability of detected edge points can be improved. We apply the selected points for log-polar coordinate's transformation...
The Liaodong Bay is the northernmost part of China's seas, and sea ices are often seen there in cold winter, which strongly affect the development of marine economy, maritime transportation, and offshore fishery. The temporal and spatial changing patterns of sea ices in the Liaodong Bay were primarily examined with Landsat remote sensing images totaling 20 scenes. The results show that sea ices in...
Rainstorm waterlogging is one of the most frequently occurring hazards for most cities in China, which causes a great impact to urban life and social development. To perform rainstorm waterlogging disaster simulation, based on the advantages of remote sensing, an alternative integrated model was presented from hazard assessment, vulnerability assessment and exposure analysis on the basis of meteorological...
With the development of Voronoi theory and algorithm, more and more attention was paid in the application of Voronoi in Cartography. In this paper, Voronoi Diagram and its applications were briefly introduced at first. Then the author focused on its applications in Cartography from the identification and extraction of map information, map generalization, automatic name placement and other aspects...
With the rapid development of rural socio-economic in China, multi-source statistical information is one kind important data to enhance decision-making for government. The rural has become a major problem. In this paper, a set of GIS spatial analysis methods of rural social-economic data were proposed and researched on, spatial data and statistical data were integrated to create a comprehensive spatial...
With China's continuous economic development, the requirement of transportation capacity is increasing, and a corresponding increase in highway construction is raised to an important position. As regions, which highway route straddled, often have volatile features and complex geological environment. When facing the complicated geological environment, the traditional exploration methods in the field...
Based on the analysis of the existing problems in pixel-based image processing and object based image analysis (OBIA), this paper proposed a Geographic Unit Sequences (GUS) based image analysis approach, designed to apply geographic ontology knowledge to object based image analysis, so that the image analysis results become the carriers of geographic principle rather than the distribution of land...
To explore the relationship between seasonal influenza and the environment, the principal task is to make data on influenza and environment for effective management. This paper focuses on the design and implementation of spatial database system for seasonal influenza in mainland China. Firstly, it proposed the influential environmental factors for seasonal influenza and collected the influenza surveillance...
Due to the influence of atmosphere condition, cloud cover is one of the most disturbance factors in remote sensing image. So cloud removal is a very important step for improving the quality of the image before making analysis. Because thin cloud is the low frequency component in remote sensing images, homomorphic filtering can be used to remove thin cloud. The traditional method takes whole image...
The work present in this paper focuses on using CBERS imagery data to acquire some information such as land use/cover change (LUCC) by means of remote sensing and GIS and to find out an appropriate classification method to CBERS imagery by applying and comparing some classification methods. CBERS CCD imageries of Xuzhou city in 2001, 2005 and 2008 were classified by using decision tree classifier,...
Edge detection is the process of localizing pixel intensity transitions. The goal of this paper is to find ways to extend gravitational method to multispectral images. This paper considers the edge detection problem in feature space. Different from the old gravitational method, in feature space, each image pixel is considered as a celestial body with a mass represented by its spectral intensity instead...
In recent years, as expansion of city size and urban population, waterlogging has become more frequently in Guangzhou. It has seriously affected people's routine life. In this study, an urban waterlogging model based on SCS (Soil Conservation Service) model and the GIS was built and was applied to assess hazard risk of waterlogging in Tianhe District of Guangzhou, China. It consists of three parts:...
Taking IGBP/GCTE terrestrial transects (NETC and CST) as study areas, the present work extracted NDVI of terrestrial eco-regions in the transects using the MODIS/16-day NDVI from 2004.04 to 2010.08, to investigate the phonological responding of different ecosystems to global changing in Northeast Asia through monitoring the pheological trends such as Onp, EndP, DurP, MaxP, MaxV and RanV from actual...
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...
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