IRS-P6与SPOT-5卫星影像在土地利用动态遥感监测中应用的比较   总被引：2，自引：1，他引：2  

吴海平  刘顺喜  史良树 《国土资源遥感》2005,(4):42-45

IRS-P6卫星影像的最高空间分辨率是5.8 m,在土地利用动态遥感监测领域中有较大的应用潜力,本研究通过与2.5 m分辨率的SPOT-5卫星影像在成图比例尺、响应图斑大小、地类可解度和信息提取精度等方面进行比较试验,结果表明,IRS-P6卫星影像可以制作1︰2.5万和1︰5万中等比例尺的图件,更新或辅助更新1︰2.5万与1︰5万的土地利用现状图.在土地利用动态遥感监测中,可以作为另外一种数据源与单一的SPOT数据源进行互补,使之更快捷地服务于国土资源管理工作.  相似文献   

Spot Revisited: Accuracy Assessment, Dem Generation and Validation from Stereo Spot 5 Hrg Images     

Gürcan  Büyüksalih  Güven  Koçak  Hüseyin  Topan  Murat  Oruç  Aycan  Marangoz 《The Photogrammetric Record》2005,20(110):130-146

SPOT 5 HRG Level 1A and 1B stereo scenes covering Zonguldak testfield in north-west Turkey have been analysed. They comprise the left and right image components with base to height ratio of 0·54. The pixel size on the ground is 5 m. The bundle orientation was executed by the PCI Geomatica V9.1.4 software package and resulted in 3D geopositioning to sub-pixel accuracies in each axis provided that at least six control points were used in the computation. Root mean square error (rmse) values and vectors of residual errors for Levels 1A and 1B are similar, even for different control and check point configurations. Based on the scene orientation, Level 1A and 1B digital elevation models (DEMs) of the testfield have been determined by automatic matching and validated by the reference DEM digitised from the 1:25 000 scale topographic maps, interferometric DEMs from Shuttle Radar Topography Mission (SRTM) X- and C-band SAR data and the GPS profiles measured along the main roads in the testfield. Although the accuracies of reference data-sets are too similar to the generated SPOT DEMs, these are the only high quality reference materials available in this area. Sub-pixel height accuracy was indicated by the comparison with profile points. However, they are in favourable locations where matching is always successful, so such a result may give a biased measure of the accuracy of the corresponding DEMs.  相似文献   

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   

SPOT5卫星影像在土地变更调查中的应用   总被引：1，自引：0，他引：1  

付丽莉  李钢  王庆 《国土资源信息化》2005,26(5):24-28

SPOT5因为具有很高的分辨率,在土地变更调查中有着广泛的应用。对于不同的用地类型,SPOT5的分辨能力也不同,本文利用SPOT5影像室内判读发现的变化图斑与实际变化情况进行对比,介绍了SPOT5卫星影像在北京大兴区土地变更调查实际应用中的具体方法。  相似文献   

Analysis on coral reefs mapping using SPOT5 data at the Dongsha Atoll     

CHEN Jianyu  MAO Zhihu  ZHANG Huaguo  WU Junping  CHEN Xiaodong  PAN Delu 《海洋学报(英文版)》2007,26(2):26-35

Coral reefs are an sensitive-to-environment complex marine ecosystem. The ecosystem of corals is rich in biodiversity. Remote sensing offers a powerful tool for categorizing coral reefs and is the most cost-effective approach for the large-scale reef survey. The Dongsha Atoll, more than 300 km2 with an average depth of 10 m, is located at the northern continental margin of the South China Sea. It has been abused by destructive fishing during recent decades. Three satellite imageries (Quickbird2, ETM and SPOT5) are used to evaluate the capabilities of SPOT5 imagery to provide data that are useful for categorizing the current distribution of coral reefs therein. During the data processing, unsupervised classification functions are adopted for ETM and SPOT5 data, while the supervised classification method is used for Quickbird2. The classes are (or not) merged into coral reef, and then will be operated by vectorization, simplification, and topological analysis. There are 1 331 coral reefs larger than 100 m2 with a detection limit of 3×3 pixels at the multi-band data of Quickbird2, which is taken as the comparison baseline. The results extracted from SPOT5 and ETM images are less in number and area than those from the Quickbird2 image, whereas the results from SPOT5 data are better than those of ETM data at the silty lagoon due to its higher resolution. SPOT5 XS band 2 fails to distinguish the deep substrate inside the atoll compared with ETM data because of its poor penetration capability. Only SPOT XS band 1 cannot be used to differentiate coral reef from sand bottom. Merging the SPOT5 multi-bands data with the spatial resolution of SPOT5 pan-data and referring to ETM imagery are expected to provide an optimal satellite-based approach for mapping of coral reefs.  相似文献