Comparison of satellite and air photo based landslide susceptibility maps   总被引：4，自引：1，他引：4  

Frank Weirich  Leonhard Blesius   《Geomorphology》2007,87(4):352-364

Landslide susceptibility maps can be prepared in a variety of ways. Many geoscientists favour the use of an overlay model approach in which several map layers are combined by some arithmetic rules to determine the potential for sliding in an area or region. The resulting susceptibility maps, although based on a subjective weighting of relevant factors, can often be of high accuracy and utility. In order to obtain the relevant input data for this type of analysis, remotely sensed data are often used. To date, susceptibility mapping, just as the mapping of historic and individual landslides, has tended to require higher-resolution imagery. This has somewhat limited the application of landslide susceptibility mapping. While high-resolution air photo or satellite imagery is superior to lower resolution imagery for the purpose of mapping of historic and individual landslides, such higher levels of resolution may not be required for the development of landslide susceptibility maps. In order to determine if medium-resolution satellite imagery, such as SPOT or ASTER, could provide the needed data for landslide susceptibility mapping, a comparison was undertaken of landslide susceptibility model output resulting from the use of stereo NAPP aerial photography versus the use of data obtained from stereo SPOT imagery. The test area selected for this study consisted of two watersheds, Pena Canyon and Big Rock Canyon, situated west of Santa Monica, California, USA, along the Pacific Coast Highway. Both watersheds have a long and well-documented history of landslide activity and sufficient geologic variability and complexity to provide a good test site. The specific overlay model used in this evaluation required input data consistent with the needs of many other models of this type. The model output derived from the two different data sources and presented here in the form of susceptibility maps were virtually identical. Statistical and difference analysis confirmed that both methods of obtaining input data provide similar results and successfully identified landslide prone areas. These results suggest that satellite imagery, in this instance, SPOT images, could potentially be used in lieu of conventional air photos, to evaluate landslide susceptibility. In many situations, especially in the case of remote locations and/or developing countries, this capability should result in substantial savings in terms of time, financial resources, and overall viability.  相似文献   

Investigation of physical sensor models for modelling SPOT 3 orbits     

Taejung  Kim  Hyunsuk  Kim  Sooahm  Rhee 《The Photogrammetric Record》2007,22(119):257-273

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基于GPS实测控制点的SPOT 5 1A数据几何校正方法精度比较   总被引：1，自引：0，他引：1  

陈华  安娜  杨清华 《国土资源遥感》2007,18(4):47-50

采用高精度的星基差分GPS实测控制点对SPOT 5 1A数据几何校正方法进行比较，对校正误差的产生原因进行分析。结果表 明，正射模型法的校正精度远高于多项式法的校正精度;多项式法在X方向上的误差远大于Y方向上的误差；正射模型法的误差在2个 方向上差别不大。卫星扫描角度引起的像元畸变是多项式方法产生较大误差的重要原因。  相似文献   

利用SPOT5卫星遥感影像生产我国西部空白区1:5万地形图的探讨与实践     

桂木政 《四川测绘》2007,30(6):264-267

随着卫星遥感影像处理技术的不断提高,卫星遥感影像的广泛应用已成为讨论热点。本文探讨和研究基于SPOT5卫星遥感影像制作用于1:5万地形图的生产模式、工艺流程和相应的技术指标。  相似文献   

利用SPOT-5卫星遥感影像更新1：10000地形图初探   总被引：2，自引：0，他引：2  

胡旭伟  王昌翰 《测绘与空间地理信息》2007,30(3):82-85

通过利用SPOT-5（2．5m）卫星遥感影像更新山地1：10000地形图试验研究，总结了利用SPOT-5（2．5m）卫星影像更新1：10000地形图的工艺方法。成功地用于重庆市部分无航片山区的1：10000地形图更新。  相似文献   

基于卫星参数约束条件的SPOT5影像纠正方法     

郑琳  林怡  陈鹰 《测绘信息与工程》2007,32(1):23-25

讨论了SPOT5影像的成像模型和纠正方法,提出了成像模型和卫星参数约束条件联合解算的纠正方法,实现了某地区基于卫星参数约束条件的SPOT5影像的纠正。  相似文献   

推扫式光学卫星影像系统几何校正产品的3维几何模型及定向算法研究   总被引：1，自引：0，他引：1  

张过  厉芳婷  江万寿  翟亮  唐新明 《测绘学报》2010,39(1):34-38

提出推扫式光学卫星影像系统几何校正产品的3维几何模型的概念,在推导推扫式光学卫星影像系统几何校正产品的3维几何模型基础上,对RPC模型用于表示推扫式光学卫星影像系统几何校正产品的3维几何模型的可行性进行分析,并用SPOT5HRG影像以进行验证。实验表明,RPC模型能够很好地用于表示推扫式光学卫星影像系统几何校正产品的高程起伏引起的变形规律,基于该模型的影像定向精度不低于推扫式光学卫星影像辐射校正产品的严密成像几何模型。  相似文献   

高分辨率卫星立体像对用于测绘产品精度检测的方法探讨     

李全  马治  尹大林 《测绘与空间地理信息》2010,33(3):55-57,62

从实际生产需要出发,进行IKONOS立体像对用于SPOT5卫星影像测绘产品的精度检测方法试验,研究在自然环境、交通条件等非常恶劣的外业工作困难地区,利用高分辨率卫星影像进行测绘产品精度检测的方法。  相似文献   

基于RS和GIS的城市公共绿地功能模糊评价     

费鲜芸  张志国  高祥伟 《测绘科学》2010,35(1):154-155

城市公共绿地具有重要的生态功能和社会功能,良好的评价体系有利于其科学的规划和管理。目前主要采用人均公共绿地和服务半径两个指标对公共绿地质量进行评价,不能较好地评价其生态和社会功能。本文根据公共绿地的功能特点,按照评价体系可操作性和可比性要求,选择单位公园绿化覆盖率、面积大小、公园服务半径内的居民区和单位面积比例、服务半径内道路面积比例作为评价因子。并以山东省泰安市为研究区,利用遥感影像监督分类结合ArcGIS空间分析方法从SPOT5影像中获取评价因子数据,利用多级模糊评判方法对研究区城市公共绿地进行评判。模糊评价结果为泰安市公共绿地的生态功能和社会功能综合得分为77.449分,等级标准为良好。  相似文献   

Time series analysis of optical remote sensing data for the mapping of temporary surface water bodies in sub-Saharan western Africa   总被引：2，自引：0，他引：2  

E.M. Haas  E. Bartholom  B. Combal 《Journal of Hydrology》2009,370(1-4):52-63

A map of temporary small water bodies (TSWB) at 1 km resolution was derived for the arid, semi-arid and dry sub-humid regions of sub-Saharan western Africa where the spatio-temporal distribution of actual surface water occurrence exhibits high inter- and intra-annual variability. Water bodies and humid areas have been mapped and characterized by the analysis of 10 daily small water bodies (SWB) maps based on SPOT VEGETATION (VGT) data spanning the period January 1999–September 2007. Further analysis of the SWB time series provided additional information about the seasonal recurrence of water bodies as well as their hydrological function. A map derived from a continuous time series assures the inclusion of temporary features, a clear advantage compared to other datasets, which are based on several single date observations. The method described in this paper targets at a rapid creation of TSWB maps based on the SWB time series for different time intervals and regions.An accuracy assessment has been carried out with a stratified random sampling approach and a one-stage cluster analysis that relies on high-resolution satellite data to verify the detected water bodies. The overall accuracy, considering only the commission error, is 95.4% for the whole study region, with best results in the arid and semi-arid climate zone. The method to map water bodies delivers satisfactory results, particularly for sparsely vegetated areas as well as flat areas of the study region. In more humid, more vegetated areas and in mountainous areas, the possibility of false detections increases due to surface characteristics.  相似文献