International Symposium on Lidar and Radar Mapping Technologies最新文献

{"title":"Monitoring land subsidence by PS-DInSAR and SBAS methods in Tianjin City","authors":"H. Fan, K. Deng, C. Zhu, Jiqun Xue","doi":"10.1117/12.912344","DOIUrl":"https://doi.org/10.1117/12.912344","url":null,"abstract":"Because of groundwater over-exploitation, the land subsidence of Tianjin city has become more and more serious. Some researchers tried to use D-InSAR technique to monitor the subsidence of this area. However, D-InSAR has some problems such as space and time baseline decorrelation and atmospheric influence. In order to obtain long time series land deformation with high accuracy, SAR image set to monitor land subsidence has become a research focus. PSDInSAR (Persistent Scatterers-DInSAR) and SBAS (Small Baseline Sets) are two classical methods to monitor land subsidence by SAR images. The former chooses one image as the master and the latter chooses several images as the masters according to the threshold of baselines. Using eighteen ERS images and SRTM DEM data the land subsidence of Tianjin city from 1992 to 1998 was obtained by two methods mentioned. 18906 and 42041 PS points were identified respectively by PS-DInSAR and SBAS. While, 16.4 mm/a and 24.2 mm/a of the mean maximal subsidence velocities were obtained respectively. Although they are different in values, the distributions and subsidence laws of points are nearly same.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127319079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of ICESat/GLAS waveform data for characterizing forests in a hilly region","authors":"C. Hilbert, C. Schmullius, M. Zink","doi":"10.1117/12.913959","DOIUrl":"https://doi.org/10.1117/12.913959","url":null,"abstract":"ICESat/GLAS data for a temperate forest in a hilly region were analysed regarding the potential to retrieve maximum canopy height using a direct approach. The GLAS height was derived by calculating the range of the waveform Signal Begin and the Ground Peak. The comparison with an inventory data base and airborne lidar based heights revealed that the GLAS height overestimates the reference heights by on average 5 m and 7 m, respectively (Std=6 m and Std=5 m). The GLAS waveforms were further investigated regarding the canopy structure and the ground surface topography. It was found that the waveforms are most influenced by the ground surface topography. The topography clearly affects the waveform shape and therefore also the accuracy of the GLAS height estimation. Waveforms corresponding to footprints with a mean slope up to 10° have a high potential to derive tree height. The correlation between the GLAS and reference heights is still fair for waveforms of moderate slope 10-15°. Higher slopes clearly challenge the analysis of the waveform structure and the derivation of forest parameters.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131949823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Architecture planning and geo-disasters assessment mapping of landslide by using airborne lidar data and UAV images","authors":"Chun Liu, Weiyue Li, W. Lei, Lin Liu, Hangbin Wu","doi":"10.1117/12.912525","DOIUrl":"https://doi.org/10.1117/12.912525","url":null,"abstract":"After the operation of GPS/IMU direct geo-referencing, segmentation, filtering, classification of scattered point data and aerial triangulation on airborne LiDAR(Light Detection and Ranging) data, the accurate and high-resolution DEM of the study area in the west part of Zengcheng city, Guangdong, China was constructed. In addition, unmanned aerial vehicle (UAV) images were used for ground objects identification. Landslides occur frequently in summer in the city because of heavy rainfall. The LiDAR data (point cloud) and the mosaic images were then combined to produce the suitability distribution maps by considering Several factors, such as slope gradient, slope aspect, on-the-spot investigation data etc The maps can then be used to analyze the potential risk of landslides and assess the risk level around some buildings. The experiment results show that the method based on LiDAR data and UAV images can rapidly and accurately survey the terrain of the study area and also provides useful information for architectural design.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128195961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SAR image registration based on Susan algorithm","authors":"Chun-bo Wang, Shaohua Fu, Zhong-yi Wei","doi":"10.1117/12.912333","DOIUrl":"https://doi.org/10.1117/12.912333","url":null,"abstract":"Synthetic Aperture Radar (SAR) is an active remote sensing system which can be installed on aircraft, satellite and other carriers with the advantages of all day and night and all-weather ability. It is the important problem that how to deal with SAR and extract information reasonably and efficiently. Particularly SAR image geometric correction is the bottleneck to impede the application of SAR. In this paper we introduces image registration and the Susan algorithm knowledge firstly, then introduces the process of SAR image registration based on Susan algorithm and finally presents experimental results of SAR image registration. The Experiment shows that this method is effective and applicable, no matter from calculating the time or from the calculation accuracy.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114939947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geometric model based registration of terrestrial laser scanning data","authors":"Dong Zhang, Teng Huang, Guihua Li","doi":"10.1117/12.912919","DOIUrl":"https://doi.org/10.1117/12.912919","url":null,"abstract":"This paper presents an approach for the registration of terrestrial laser scanning point clouds based on geometric models while there are no targets in the scanning process. We obtained the axis vectors of the cylinders that are fitted from the segmented point clouds in the overlapping areas. Then we solved the parameters of the rotation and translation by using the axis vectors and the centers of the cylinders. Further, we analyzed the registration accuracy and its influencing factors. The test result shows that the geometric model based approach actually offers high degree of flexibility and meets high accuracy for registering terrestrial laser scanning data.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126229553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on cascade updating methods for multi-scale map data","authors":"Qiuping Lan, Jia Li, Yining Liu","doi":"10.1117/12.912726","DOIUrl":"https://doi.org/10.1117/12.912726","url":null,"abstract":"This paper firstly suggested that multi-scale map data updating is based on the updating of larger scale map data, and the other smaller scale map data are updated step by step. Nowadays, there have been quite a few technical means to update the larger scale data, including field surveying, digital photogrammetry, remote sensing, LiDAR and digitization from the existing topographic maps, etc. Secondly, an updating method for incremental generalization cascade updating was provided according to the demands for map data at intermediate and small scale in china. The matching association table was established based on the determination of the matching relation and similar values through the method of the matching of multi-scale spatial features. The incremental information was then acquired through variation detection considering cartographic generalization impact. It was used to realize the incremental updating of map data. Furthermore, the cascade updating of multi-scale data were realized by the next matching association table, which making sure of uniformity of multi-scale data.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129120899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of InSAR technology in monitoring of ground deformation in Yaoqiao mining area","authors":"Q. Tang, Fu Chen, N. Wei","doi":"10.1117/12.912730","DOIUrl":"https://doi.org/10.1117/12.912730","url":null,"abstract":"In this paper, the author use the DORIS software to conduct the differential interferometric processing of existing data and extracts ground deformation fields in different periods of Yaoqiao mining area, Xuzhou. After that, the analysis is carried out by combining with characteristics of ground exploitation subsidence, and the comparative analysis of land subsidence data obtained by conventional methods is conducted. The results show that: the land subsidence of Yaoqiao mining area is quite consistent to the exploitation subsidence rules; in addition, D-InSAR can monitor minor changes of exploitation subsidence boundaries in mining areas and the evolution trend of subsidence surface, and also can measure the subsidence speed. It has proved that the InSAR technology can conduct continuously effective dynamic monitoring of ground deformation in mining areas from this example. In terms of the regional continuous ground depression, DInSAR is much better than the traditional methods of measurement. The development of this new Earth observation technology has important practical significance in promoting the improvement of China's \"digital mine\" system and guiding the planning and preservation of buildings and road systems in mining areas.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"8286 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130878904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on deformation monitoring caused by large earthquake with WSM interferometry","authors":"Ting-chen Jiang, Tao Li, Jing-nan Liu","doi":"10.1117/12.912465","DOIUrl":"https://doi.org/10.1117/12.912465","url":null,"abstract":"Wide Swath mode (WSM) is also called as ScanSAR, it is character is that synthetic aperture time is shared by circumjacent sub swaths and azimuth resolution is reduced so that large area deformation monitoring for earthquakes is realized. For imaging principle ScanSAR and IM mode are different, process of interferometry also have a lot of dissimilitudes such as coherence, co-registering, correction of atmosphere effects and geoid undulation. In order to make use of ScanSAR data to get wider deformation field, key techniques of ScanSAR interferometry are studied and analyzed in this paper. In the end, 405 km ×405 km deformation fields of Wenchuan and Yutian earthquake are gained by using ENVISAT ScanSAR data. With the application to ScanSAR interferometry in Wenchuan and Yutian earthquake, it is significant for Earth Science research such as large earthquakes and crustal motion.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115027633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combining ALOS-PALSAR imagery with field water level measurements for flood mapping of a tropical floodplain","authors":"H. Hidayat, D. Hoekman, M. Vissers, A. Hoitink","doi":"10.1117/12.912735","DOIUrl":"https://doi.org/10.1117/12.912735","url":null,"abstract":"Radar imagery is potentially useful for the identification, mapping, and measurement of streams, lakes, and wetlands. Many studies showed that comparison of two consecutive radar images is useful for determining flood extent. However, the use of radar data series for flood mapping is still rarely reported. The purpose of this study is to explore the use of ALOS-PALSAR imagery for observing the dynamics of the Mahakam River floodplain in Kalimantan, Indonesia, by incorporating field water level measurements. Water level measurements were carried out along the river, lakes and at two peatland locations, using arrays of pressure transducers. The first peatland (P1) is part of the Mahakam floodplain, representing open peat area dominated by shrub and reed. The second peatland (P2) represents a forest covered peatland. A series of PALSAR imagery (polarity: HH; pixel spacing: 50 m) covering the middle and lower Mahakam area in the years 2007 and 2008 was collected. A land use/land cover map was available from a previous analysis of PALSAR imagery. To analyze Radar backscatter behavior for different land cover types, several regions of interest were selected, based on the land cover classes. A number of land cover classes (medium shrub, high shrub, fern/grass, and secondary forest) were found to be sensitive to flooding, whereas in some other classes (peat forest, riverine forest and tree plantation) backscatter signatures remained almost unchanged with flood inundation. Correlations between water level and radar backscatter of the regions of interest were used to distinguish between three types of flooding signal, viz. flooding of low vegetation, flooding of high vegetation, and the boundary shift of lakes. An analysis of the relationship between radar backscatter and water levels was carried out in each of the regions of interest. For lakes and shrub covered peatland in P1, where the range of water level variation was high, a good water level-backscatter correlation was obtained. In peat forest covered peatland in P2, subject to a small range of water level variation, water level-backscatter correlations were poor.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115038682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tropical forest mapping and change detection using ALOS PALSAR data","authors":"Wenmei Li, Q. Feng, E. Chen, Zeng-yuan Li","doi":"10.1117/12.912610","DOIUrl":"https://doi.org/10.1117/12.912610","url":null,"abstract":"Tropical forests represent a significant carbon store in the global carbon balance. Over recent years, substantial forests have been cut or burned. To investigate the changes of deforestation in tropical forests, ALOS PALSAR 50 m Orthorectified mosaic product (FBD) in Borneo from 2007 to 2009 was used, as SAR data can overcome the shortcoming of optical images. Pixel based unsupervised classification and object-oriented classification methods were applied to choose better method for classification. The comparison showed the object-oriented classification got the better result and its accuracy was higher. In the following step, object-oriented classification method was employed to monitor the changes of deforestation in Borneo during two years. The results indicated the deforestation increased sharply, especially the areas in the coastal and next to non-forest land cover/use. The change law of land cover/use in Borneo is forest to shrub, grassland and bare soil. There are also inverse changes from non-forest to forest by reforestation around settlement and water areas. Overall, forest decreases gradually and non-forest areas increases simultaneously in Borneo. This research indicates clearly that ALOS PALSAR Ortho-rectified FBD product can be used to classify land cover/use and two different time images could be employed in change detection without in situ data.","PeriodicalId":194292,"journal":{"name":"International Symposium on Lidar and Radar Mapping Technologies","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116524553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}