多源遥感技术在汶川震后高精度数字高程模型重建中的精度分析
|
摘要
汶川地震后,震中地区地表形态遭到很大破坏.在该地区开展科学研究急需高精度数字高程模型支持,重建震区数字高程模型十分必要.本文以高精度重建该地区数字高程模型为目标,综合ALOS PRISM获取的三轨立体像对、ALOS PALSAR雷达影像和欧空局发布的汶川地震ENVISAT雷达影像等资料,采用光学遥感立体测图技术、InSAR技术,并融合已有全球数字高程模型,研究建立覆盖此地区15m分辨率的数字高程模型.在利用中国地壳运动监测网络和陆态网络工程项目实测的GPS数据进行高程精度分析后表明:ALOS PRISM DEM精度优于10m(95%置信度);ALOS PALSAR DEM精度优于10m(95%置信度),而ENVSAT ASAR DEM在平原、丘陵地区精度优于20m(95%置信度).研究证明:ALOS PRISM能进行高精度的地形测量,ALOS PALSAR在山区仍可获得高精度数字高程模型,ENVISAT ASAR在平原地区的精度较高.因此融合光学、雷达遥感技术完全满足获取高精度、高分辨率震区数字高程模型的需要,这为在困难地区建立高精度数字高程模型提供了一个很好的途径.
After Wenchuan earthquake,the surface was destructed largely,especially in the epicenter area.Furthermore,many scientific activities carried out subsequently in the region also require the latest,high-precision digital elevation model as well,the reconstruction of digital elevation model is necessary.In this paper,to reconstruct of the high precision digital elevation model in the region,ALOS PRISM with the triplet stereo pairs,ALOS PALSAR radar images and ESA ENVISAT radar images will be integrated to generate a new high-resolution and high-accuracy DEM(Digital Elevation Model) on the basis of optical remote sensing,InSAR technique with integration of the global digital elevation model.The DEM has been generated at 15 m resolution.Accuracy assessment in measured elevations indicates that vertical accuracy of ALOS PRISM DEM is better than 10 meters(95% confidence level),better than 10 meters(95% confidence level) of ALOS PALSAR DEM,and The ENVSAT DEM accuracy is better than 20 meters(95% confidence level) in hills area using GPS data,which were measured in the Crustal Movement Observation Network of China project.The results reveal that ALOS PRISM can be use to produce highly accurate topographic map,ALOS PALSAR can still get high-precision digital elevation model in mountains,ENVISAT ASAR high accuracy in hill areas.Therefore,integration of optical and radar remote sensing technology entirely meets to produce high-precision,high-resolution digital elevation model,especially which is a good way in difficult areas.
After Wenchuan earthquake,the surface was destructed largely,especially in the epicenter area.Furthermore,many scientific activities carried out subsequently in the region also require the latest,high-precision digital elevation model as well,the reconstruction of digital elevation model is necessary.In this paper,to reconstruct of the high precision digital elevation model in the region,ALOS PRISM with the triplet stereo pairs,ALOS PALSAR radar images and ESA ENVISAT radar images will be integrated to generate a new high-resolution and high-accuracy DEM(Digital Elevation Model) on the basis of optical remote sensing,InSAR technique with integration of the global digital elevation model.The DEM has been generated at 15 m resolution.Accuracy assessment in measured elevations indicates that vertical accuracy of ALOS PRISM DEM is better than 10 meters(95% confidence level),better than 10 meters(95% confidence level) of ALOS PALSAR DEM,and The ENVSAT DEM accuracy is better than 20 meters(95% confidence level) in hills area using GPS data,which were measured in the Crustal Movement Observation Network of China project.The results reveal that ALOS PRISM can be use to produce highly accurate topographic map,ALOS PALSAR can still get high-precision digital elevation model in mountains,ENVISAT ASAR high accuracy in hill areas.Therefore,integration of optical and radar remote sensing technology entirely meets to produce high-precision,high-resolution digital elevation model,especially which is a good way in difficult areas.
引文
[1]Weydahl D J,Sagstuen J,Dick B,et al.SRTM DEM accuracyassessment over vegetated areas in Norway[J].InternationalJournal of Remote Sensing,2007,28(16):3513-3527.
[2]Huggel C,Schneider D,Miranda P J,eta l.Evaluation of ASTERand SRTM DEM data for lahar modeling:A case study onlahars from Popocatépetl Volcano,Mexico[J].Journal ofVolcanology and Geothermal Research,2008,170(1-2):99-110.
[3]Fujita K,Suzuki R,Nuimura T,et al.Performance of ASTERand SRTM DEMs,and their potential for assessing glaciallakes in the Lunana region,Bhutan Himalaya[J].Journal ofGlaciology,2008,54(185):220-228.
[4]Graham L C.Synthetic Interferometer Radar for TopographicMapping[J].Proceedings of the IEEE,1974,62(6):763-768.
[5]Zebker H A,Goldstein R M.Topographic mapping frominterferometric synthetic aperture radar observations[J].J.Geophys.Res.,1986,91(B5):4993-4999.
[6]Massonnet D,Rossi M,Carmona C,et al.The displacementfield of the Landers earthquake mapped by radarinterferometry[J].Nature,1993,364(6433):138-142.
[7]单新建,马瑾,王长林,等.利用星载D-INSAR技术获取的地表形变场提取玛尼地震震源断层参数[J].中国科学(D辑),2002,32(10):837-844.Shan X J,Ma J,Wang C L,et al.Co-seismic grounddeformation and source parameters of Mani M7.9earthquakeinferred from spaceborne D-InSAR observation data[J].Science in China(Series D),2004,47(6):481-488.
[8]单新建,屈春燕,宋小刚,等.汶川Ms8.0级地震InSAR同震形变场观测与研究[J].地球物理学报,2009,52(2):496-504.Shan X J,Qu C Y,Song X G,et al.Coseismic surfacedeformation caused by the Wenchuan Ms8.0earthquake fromInSAR data analysis[J].Chinese J.Geophys.(in Chinese),2009,52(2):496-504.
[9]许才军,温扬茂.基于InSAR数据的西藏玛尼Ms7.9级地震的地壳不均匀性研究[J].武汉大学学报(信息科学版),2008,33(8):846-849.Xu C J,Wen Y M.Nonhomogeneity of the Crust from Ms7.9Manyi(Tibet)Earthquake with InSAR Observation[J].Geomatics and Information Science of Wuhan University(inChinese),2008,33(8):846-849.
[10]李陶.重复轨道星载SAR差分干涉监测地表形变研究[博士学位论文].武汉:武汉大学,2004.Li T.Study on surface deformation monitoring by repeat passspaceborne SAR differential interferograms[D].Wuhan:Wuhan University,2004
[11]Bignone F,Umakawa H.Assessment of ALOS PRISM digitalelevation model extraction over Japan[J].The InternationalArchives of the Photogrammetry,Remote Sensing and SpatialInformation Sciences,2008,37(B1):1135-1138.
[12]Zebker H A,Werner C,Rosen P A,et al.Accuracy ofTopographic Maps Derived from ERS-1Interferometric Radar[J].IEEE Trans.Geosci.Sens.,1994,32(4):823-836.
[13]李振洪,刘经南,许才军.InSAR数据处理中的误差分析[J].武汉大学学报(信息科学版),2004,29(1):72-75.Li Z H,Liu J N,Xu C J.Error analysis in InSAR dataprocessing[J].Geomatics and Information Science of WuhanUniversity(in Chinese),2004,29(1):72-76.
[14]庞勇,李增元,陈尔学,等.SIR-C C波段和L波段雷达干涉数据生成DEM的比较[J].中国图像图形学报(A辑),2002,7(7):735-739.Pang Y,Li Z Y,Chen E X,et al.Compare of DEMsgenerated from SIR-C C-band and L-band SAR data[J].Journal of Image and Graphics(in Chinese),2002,7(7):735-739.
[15]舒宁.雷达影像干涉测量原理[M].武汉大学出版社,2003:10-25.Shu N.Principles of Radar Interferometry[M].Wuhan:Wuhan University Press(in Chinese),2003:10-25.
[16]沈强,乔学军,金银龙,等.ALOS PALSAR雷达影像InSAR数据处理中的基线和地形误差分析[J].大地测量与地球动力学,2012,32(2):1-6.Shen Q,Qiao X J,Jin Y L,et al.Error analysis of baselineand terrain in InSAR data processing using ALOS PALSAR[J].Journal of Geodesy and Geodynamics(in Chinese),2012,32(2):1-6.
[2]Huggel C,Schneider D,Miranda P J,eta l.Evaluation of ASTERand SRTM DEM data for lahar modeling:A case study onlahars from Popocatépetl Volcano,Mexico[J].Journal ofVolcanology and Geothermal Research,2008,170(1-2):99-110.
[3]Fujita K,Suzuki R,Nuimura T,et al.Performance of ASTERand SRTM DEMs,and their potential for assessing glaciallakes in the Lunana region,Bhutan Himalaya[J].Journal ofGlaciology,2008,54(185):220-228.
[4]Graham L C.Synthetic Interferometer Radar for TopographicMapping[J].Proceedings of the IEEE,1974,62(6):763-768.
[5]Zebker H A,Goldstein R M.Topographic mapping frominterferometric synthetic aperture radar observations[J].J.Geophys.Res.,1986,91(B5):4993-4999.
[6]Massonnet D,Rossi M,Carmona C,et al.The displacementfield of the Landers earthquake mapped by radarinterferometry[J].Nature,1993,364(6433):138-142.
[7]单新建,马瑾,王长林,等.利用星载D-INSAR技术获取的地表形变场提取玛尼地震震源断层参数[J].中国科学(D辑),2002,32(10):837-844.Shan X J,Ma J,Wang C L,et al.Co-seismic grounddeformation and source parameters of Mani M7.9earthquakeinferred from spaceborne D-InSAR observation data[J].Science in China(Series D),2004,47(6):481-488.
[8]单新建,屈春燕,宋小刚,等.汶川Ms8.0级地震InSAR同震形变场观测与研究[J].地球物理学报,2009,52(2):496-504.Shan X J,Qu C Y,Song X G,et al.Coseismic surfacedeformation caused by the Wenchuan Ms8.0earthquake fromInSAR data analysis[J].Chinese J.Geophys.(in Chinese),2009,52(2):496-504.
[9]许才军,温扬茂.基于InSAR数据的西藏玛尼Ms7.9级地震的地壳不均匀性研究[J].武汉大学学报(信息科学版),2008,33(8):846-849.Xu C J,Wen Y M.Nonhomogeneity of the Crust from Ms7.9Manyi(Tibet)Earthquake with InSAR Observation[J].Geomatics and Information Science of Wuhan University(inChinese),2008,33(8):846-849.
[10]李陶.重复轨道星载SAR差分干涉监测地表形变研究[博士学位论文].武汉:武汉大学,2004.Li T.Study on surface deformation monitoring by repeat passspaceborne SAR differential interferograms[D].Wuhan:Wuhan University,2004
[11]Bignone F,Umakawa H.Assessment of ALOS PRISM digitalelevation model extraction over Japan[J].The InternationalArchives of the Photogrammetry,Remote Sensing and SpatialInformation Sciences,2008,37(B1):1135-1138.
[12]Zebker H A,Werner C,Rosen P A,et al.Accuracy ofTopographic Maps Derived from ERS-1Interferometric Radar[J].IEEE Trans.Geosci.Sens.,1994,32(4):823-836.
[13]李振洪,刘经南,许才军.InSAR数据处理中的误差分析[J].武汉大学学报(信息科学版),2004,29(1):72-75.Li Z H,Liu J N,Xu C J.Error analysis in InSAR dataprocessing[J].Geomatics and Information Science of WuhanUniversity(in Chinese),2004,29(1):72-76.
[14]庞勇,李增元,陈尔学,等.SIR-C C波段和L波段雷达干涉数据生成DEM的比较[J].中国图像图形学报(A辑),2002,7(7):735-739.Pang Y,Li Z Y,Chen E X,et al.Compare of DEMsgenerated from SIR-C C-band and L-band SAR data[J].Journal of Image and Graphics(in Chinese),2002,7(7):735-739.
[15]舒宁.雷达影像干涉测量原理[M].武汉大学出版社,2003:10-25.Shu N.Principles of Radar Interferometry[M].Wuhan:Wuhan University Press(in Chinese),2003:10-25.
[16]沈强,乔学军,金银龙,等.ALOS PALSAR雷达影像InSAR数据处理中的基线和地形误差分析[J].大地测量与地球动力学,2012,32(2):1-6.Shen Q,Qiao X J,Jin Y L,et al.Error analysis of baselineand terrain in InSAR data processing using ALOS PALSAR[J].Journal of Geodesy and Geodynamics(in Chinese),2012,32(2):1-6.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心