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Atmospheric aerosol, which is an important parameter required for climate change studies, local air quality monitoring, global aerosol transport modeling, atmospheric correction and global aerosol characterization, decreases seriously regional air quality and may have a negative impact on public human health. Because aerosols had complex sources and the short lifetime, it is difficult to study the...
Urban afforesting and greening construction is the basic strategy for landscaping and ecological optimization. Based on 7 scenes of TM imagery covering Fengrun district, Tangshan city during 2001 and 2009, after relative raster preprocessing like geometric correction, image clipping and enhancement, band combination is conducted by means of calculating the principal component of TM image and correlation...
In this paper, the region-based image segmentation method is adopted to segment the remote sensing images after continuous analyzing and testing. The author extracts the wetland information from the remote sensing image by region-based image segmentation, and compares the segmentation results with the interpretation results by conventional methods. According to the result of the comparison, the author...
The Source Region of Yellow River locates in the hinterland of Qinghai-Tibet Plateau, which is especially sensitive to global environment change because of its high elevation and cold environment. Under the influence of global warming, aeolian desertified land expanded rapidly in this area during the last decades. To assess the trends of aeolian desertification from 1975 to 2005, we employed remote...
This paper compares the fraction of vegetation (FV) and normalized different vegetation index (NDVI) as indicators of oasis surface vegetation condition in Landsat imagery by investigating their relationships with the land surface temperature (LST). Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper plus (ETM+) data were used to estimate the LST in 1999 and 2009 for three different oases in...
Through the methods of change rate, dynamic degree index and transfer matrix, land use changes were analyzed, based on the land use data in 1980s and 2000. The major results could be summarized as follows: (1)A large amount of grassland, water body and barren land were transferred to forest land in 1980s–2000 in this region, because of the ecological protection and forestation. (2)Land use changes...
Sparse representation has significant success in many fields such as signal compression and reconstruction but to the best of our knowledge, no sparse-based classification solution has been proposed in the field of remote sensing. One of the reasons is that the general optimizers are extremely slow, time consuming and needs intensive processing for l1-minimization sparse representation. In this paper,...
Electronic sand table is a new high-tech product by integrating computer application, geographic information systems (GIS) and virtual reality with multimedia. In this paper, an electronic sand table system of target areas is made under the platform of ArcGIS. The design and realization scheme of electronic sand table system is introduced at first. Then, the key techniques for electronic sand table,...
Zoige wetland is the source of Yangtse River and Yellow River. Its dynamic changes are studied mostly before year of 2000 based on MSS and TM images. This study selects TM and CBERS images to obtain the landscape structure of typic region of Zoige plateau. The results show that: (1) the grassland is the primary landscape of study area. The next are bared soil, woodland and farmland. (2) Wetland area...
Land surface emissivity is one of key parameters in land surface temperature retrieval using remote sensing data. However, most methods are too complex to practical application. It is essential to create an easy method for retrieving land surface emissivity. The land surface emissivity retrieval mainly lies on land surface substance structure and wave band of sensors. This paper divides land cover...
The dynamic inspection on plant invasion is a basis for the study of the influence of plant invasion on the carbon cycle of the ecosystem in the invaded area. This paper, with Chongming Dongtan Birds Nature Reserve as the research place, Spartina alterniflora as the invasive plant and Landsat TM and SPOT as the major data source, conducted quantitative analysis on the invasion dynamics of Spartina...
This study applies GIS and RUSLE to analyzing the soil loss characteristics of Kyirong County in Tibet. The results show: (1) the R value is about 212.95 MJ·mm/(hm2·h·a). (2) average K value is about 0.332 t·hm2· h/(hm2·MJ·mm). (3) The average slope length is about 954.60m. And the average LS value is about 0.49. (4) the average annual soil loss of Kyirong County is about 4157.38 t/km2·a which is...
This study, based on remote sensing and GIS technologies, the glacier distribution map and related parameters in 1999 are obtained with some spatial data including remote sensing images, DEM, and so on. Compared to data in 1957, in 1999, there are only 15 glaciers in this area and 4 glaciers disappeared; the glacier area is 8.5, with the total reduction of 26.78% and the annual reduction of 0.64%;...
The ground is intensively heterogeneous and fragmentized, and the vegetation is very sparse in arid region, so the selection of the vegetation index of vegetation degeneration measurement is the research hotspot on vegetation remote sensing. In this study, the project area of controlling the sources of dust storms affecting Beijing and Tianjin was selected as the research object. The vegetation indexes...
In order to monitor urban vegetation coverage more accurately using remote sensing technology, a new model, which is fit for the extraction of urban vegetation coverage, is presented. In this model, TM image was decomposed by linear spectral mixture mode and then the vegetation component of TM image was amended by the high-resolution satellite image. Afterwards, an example of application was given...
Violent earthquakes damaged buildings, towns and cities. The earthquakes and the subsequent secondary disasters, such as landslips, landslides and debris flows, brought immediate threats to people there. The rescue tasks need updated and appropriate information for site selection of emergency refuges and transitional shelters, especially when a city has been destroyed and the original earthquake emergency...
On the eve of the 2008 Beijing Olympic Games, the outbreak of entermorpha prolifera in Qingdao offshore areas threatened the hosting of Olympic Sailing Games directly. With the aid of the TERRA/AQUA satellite data, we realized the entermorpha prolifera disaster monitoring. In this paper we will introduce the method and the flow of entermorpha prolifera monitoring. There are mainly three steps: 1)analyze...
Taking Hangzhou Bay Area in Zhejiang Province as the study area and using Landsat TM images as the data source, this paper brought forward the multi-layer classifying technique on the basis of spectral and spatial characters analysis of all types of features. Firstly, the Modified Normalized Difference Water Index (MNDWI) modal was used to extract the water bodies. Then, the unsupervised classification...
Soil erosion of the upper basin of Guanting reservoir in Zhangjiakou was assessed based on Landsat TM5(2007-5-19) and DEM (1∶50000). <Standards for classification and gradation of soil erosion> (SL190-2007) and the multifactor comprehensive method were adopted, and land use, vegetal cover and slope were selected as assessing factors. The result shows that very low soil erosion covers 43.36%,...
The soil erosion model of the study area is constructed according to the data of DEM. Factor R, factor K and another four factors of the study of soil erosion are acquired by using remote sensing techniques. Soil erosion is analyzed and calculated by using the soil erosion model.
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