International Symposium on Digital Earth最新文献

{"title":"Research on the method of image matching based on semi-variance function","authors":"Yuanzhi Xie, Lewen Wu, Wenjuan Wang, Wei Shen","doi":"10.1117/12.873153","DOIUrl":"https://doi.org/10.1117/12.873153","url":null,"abstract":"With the purpose of analyzing the technique of image matching based on self-correlation, the semi-variance function from geo-statistics was introduced into the image matching of this paper, which develops a method of image matching with semi-variance function as the basis, studies the matching cell of semi-variance function image matching, constructs the semi-variance function image matching similarity measure. In addition, several image matching algorithms by semivariance function were designed and realized. By experiments of comparing with the correlation coefficient matching algorithm, it has been shown that the semi-variance function matching algorithm not only can maintain a good matching accuracy, but also greatly enhance the matching efficiency; all of these evidences reveal that the matching method based on semi-variance function is feasible one. The experiments also show that the neighboring matching algorithm is of the best effect among several matching strategies.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126252214","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":"The preliminary analysis of S-band scatterometer data of three types of ground objects","authors":"Quan Chen, Zhen Li, Jianmin Zhou, B. Tian","doi":"10.1117/12.873206","DOIUrl":"https://doi.org/10.1117/12.873206","url":null,"abstract":"In the past two decades, the object characteristics at L- and C-band backscattering coefficient have been widely studied, but little attention was paid to S-band, due to the main spaceborne SAR sensors are designed at L- and C-band by now. HJ-1C is planned to be launched at the end of 2009, on which an S-Band SAR is loaded. For the applications of S-band SAR, it is necessary to obtain backscattering coefficient and analysis object characteristics at this band. In this paper, S-band relation models are preliminarily analysed for several typical ground objects, using measurements obtained by the scatterometer system of University of Electronic Science and Technology of China (UESTC). Result shows the S-band scatterometer system is instable in some cases, but object characteristics can be revealed qualitative. Therefore, some improvements shall be done to advance scatterometer's performance and field-work methods when more measurements were taken. For the quantitative analysis of S-band measurements, observations from SMEX02 PALS instrument are used to compare with the theorical simulation from water-cloud model, the result shows good.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114065856","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 IPTA to measurement of surface deformation across the Haiyuan fault","authors":"Limin Guo, X. Shan, C. Qu, Chisheng Wang, Xiaogang Song, Guifang Zhang, Yunhua Liu, Yufei Han","doi":"10.1117/12.873224","DOIUrl":"https://doi.org/10.1117/12.873224","url":null,"abstract":"The Haiyuan fault is a major active left-lateral fault in the northeast edge of Tibet-Qinghai Plateau. Studying this fault is important to understanding current deformation of the plateau and the mechanism of continental deformation. IPTA (Interferometric Point Target Analysis) can be summarized as an iterative improvement of the model parameters to achieve an optimal match to observe interferometric phases. The analysis is done for a selected set of points which correspond to point target candidates, and is a collection of tools to exploit the temporal and spatial characteristics of interferometric signatures collected from point targets to accurately map surface deformation histories, terrain heights, and relative atmospheric path delays. Surface deformation in the Haiyuan fault is about 4-6mm/y.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"6 11-12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120932291","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":"The spatial expansion of Xi'an City via geo-information Tupu","authors":"Chenlin Han, Xiuying Yang","doi":"10.1117/12.873344","DOIUrl":"https://doi.org/10.1117/12.873344","url":null,"abstract":"This paper studies the urban spatial expansion of Xi'an City, the capital of Shaanxi Province of China, focusing on the temporal and spatial characteristics of the urban expansion during 1930-2002. Choosing Xian's built-up area as the study object and taking the geographic information system as the technical support, the paper establishes a series of Geoinformation Tupu to reflect the city expansion based on the Geo-information Tupu methods and multi-time remote sensing images, historical graphic document and data. It is proved that the spatial expansion had been expanding all the 70 years of 1930-2002 with different scales, paces, and directions. The build-up areas in Xi'an City had been growing outwards from inside circle basing on the ancient city with two expansion peaks and one nadir. By temporal analysis, it is founded that, firstly, the city expanded from east to west, then from north to south and finally from the center to outsides.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"337 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115976072","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":"Segmentation of building facades from vehicle-borne laser scanning data based on mathematical morphology","authors":"Yonglin Shen, Y. Sheng","doi":"10.1117/12.873154","DOIUrl":"https://doi.org/10.1117/12.873154","url":null,"abstract":"Recently vehicle-borne laser scanning system equipped with linear array laser scanner, GPS and INS has played an important role on the acquisition of urban spatial data. In this paper, a method was proposed for the segmentation of building facades from vehicle-borne laser scanning data in the outdoor urban environment, which contains five steps including 1) preliminary filtering with depth histogram analysis; 2) binarization of point cloud; 3) mathematical morphology processing of binary image; 4) segmentation of binary image and 5) extracting building façades with the mapping relationships of vehicle-borne laser scanning data and binary image. Depth histogram analysis, calculation of grid size and determination of the number of dilation were described in detail. Finally, an experimental study was made to demonstrate the feasibility of the proposed method for the segmentation of urban building facades.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121214534","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":"Impacts of land use change on the vegetation carbon storage in the region around Taihu Lake, China","authors":"Xingyu Zhang, Xianjin Huang, Xiaofeng Zhao, Rucheng Lu","doi":"10.1117/12.873250","DOIUrl":"https://doi.org/10.1117/12.873250","url":null,"abstract":"Land use/cover change is the main drive factor for the change of ecosystem carbon storage. To understand and appraise the carbon source/sink function of terrestrial ecosystem accurately, it needs to evaluate the impact of land use changes on carbon storage firstly. Based on data from remote sensing TM imageries in 1980, 1990 and 2005 in the region around Taihu Lake in China, the process of land use/cover change which divides to cropland, forest land, wetlands, grassland, settlements and other land had been explained, then the conversion matrix of land use change had been analyzed by GIS technology. Under the above, the paper calculates the change value of vegetation carbon storage in this area which caused by land use change with the method supplied by the 2006 IPCC Guidelines for National Greenhouse Gas Inventories. The main results as follows: (1) The area of cropland, forestland and grassland had decreased by 223.26km2, 1,182.50km2 and 178.90km2 during 1980-1990, and the cropland had translated out to forest land and settlements mainly, the land types transferred into cropland includes forest land, grassland and other land, among which 1,463.90km2 of forest land was transferred into cropland. The area of grassland had increased by 1,270.47km2, adversely, the cropland and forest land had decreased by 5,929.51km2 and 1381.94km2 during 1990-2005, and the transferring-out object of cropland includes wetlands, forest land, grassland, settlements and other land, with only 59.95% of the original cropland remain unchanged. (2) The vegetation carbon storage had decreased by 642,171.27Mg because of land use change during 1980-1990, and the transferring from forest land to cropland has caused a decrease of 775,867Mg in vegetation carbon storage, that from cropland to forest land has caused a increase of 113,261.43Mg, that from grassland to cropland has caused a increase of 8,129.36Mg, and that from grassland to forest land has caused a increase of 12,304.94Mg; The vegetation carbon storage had decreased by 683,125.18Mg during 1990-2005, and the transferring from forest land to cropland has caused a decrease of 285,034Mg, that from forest land to grassland has caused a decrease of 417,617.73Mg, that from cropland to grassland has caused a decrease of 40,938.65Mg, while that from cropland and grassland to forest land has caused a respective increase of 52,856.61Mg and 7,608.59Mg. (3) The results of vegetation carbon storage change which calculated by the IPCC method had some errors in number value to other domestic research results, so the paper suggests the government of China should compile the greenhouse gas inventories which accord with it's own situation.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121787459","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":"Multiple-spatial-data-based change analysis of Northern-Five Lakes over the past century","authors":"Biao Deng, Yueping Nie, Huadong Guo","doi":"10.1117/12.873342","DOIUrl":"https://doi.org/10.1117/12.873342","url":null,"abstract":"The Northern-Five Lakes are a series of the lakes alongside the Grand Canal in Shandong Province, namely from north to south the Anshan Lake, Mata Lake, Nanwang Lake, Shushan Lake and Machang Lake. In history they played an essential role to the running of the Grand Canal of China for centuries. However, drastic decrease both in amounts and in extents happened during the past century. With the help of the remote sensing and GIS technology, using the multiple spatial data to monitor the changes of the lakes so as to get to know objectively the status and the changing trends in order to make an appropriate plan for better utilization, protection and management of the lake resources becomes possible and practical. This article utilized the map in 1907, the aerial photographs in 1954, MSS imagery in 1975, TM imagery in 1987 and 2001 respectively and SPOT5 multispectral imagery in 2005 to extract the spatial distribution of the lakes in that six periods by means of visual interpretation and supervised classification. According to the result, the decreasing magnitude, decreasing speed and the decreasing timetable of the lakes were analyzed, which would provide important reference to quantitative analysis of the change of the lakes.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121578251","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 building a geographic information services portal oriented web services","authors":"Qinchao Li, Hongwei Li, Rupeng Liang","doi":"10.1117/12.872676","DOIUrl":"https://doi.org/10.1117/12.872676","url":null,"abstract":"Web services technology is emerging as a new approach for providing access to heterogeneous computation resources and integration of distributed scientific applications. Open GIS Consortium (OGC) has constituted a series of standards, guiding creating the Web services to provide or operate geographic information. But it does not show how to integrate these services. While a portal is an application framework based on Web, which provides a single integrated access to applications, and it could integrate distributed information and applications. In this paper, we have tested building a portal oriented Web services to carry out integration and interoperability of geographic information. A framework has been designed based on an open source portal development tool named GridSphere. And some portlets invoking geographic Web services have been created and deployed. The result of the experiment indicates that the solution is feasible, and its operations are simple and convenient.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"349 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122725067","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":"Urban land cover classification using polarimetric SAR interferometry","authors":"Xinwu Li, E. Pottier, Huadong Guo, L. Ferro-Famil","doi":"10.1117/12.873222","DOIUrl":"https://doi.org/10.1117/12.873222","url":null,"abstract":"At this paper, from high resolution airborne E-SAR PolinSAR data and its statistical characteristics, Urban area land cover unsupervised classification method using polarimetric, coherence and interferometric phase differentials was proposed, and what is the role of interferometric phase differential for identification and classification of the target with vertical structure was investigated; and the potential and validation of PolinSAR data for urban area land cover identification and classification was demonstrated. The preliminary result indicates that the good classification result has been obtained, and the inclusion of interferometric phase differential significantly improved the building or man-made target identification and classification.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122996091","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":"Landslide susceptibility evaluation based on fuzzy support vector machine","authors":"W. Fu, Yuanrong He","doi":"10.1117/12.873267","DOIUrl":"https://doi.org/10.1117/12.873267","url":null,"abstract":"The aim of this study was to apply and to verify the use of Fuzzy Support Vector Machine (FSVM) for Landslide susceptibility evaluation. The goal of the study includes four stages: preparation of a landslide inventory of the study area, extraction of influential factors of landslide, calculation of fuzzy membership values and evaluation of landslide susceptibility based on FSVM. The developed approach was tested in the Putian,Fujian,China. Geological data and satellite images were collected, processed, and constructed into a spatial database using GIS and image processing. The chosen factors that influence landslide occurrence were: slope angle, elevation, all from the topographic database; lithology taken from the geologic database; vegetation index value and wetness index value, from Landsat Thermatic Mapper (TM) satellite images. Each of the above-listed factors was classified and coded using a numerical scale corresponding to the physical conditions of the region. Using those factors, landslide susceptibility was evaluated by FSVM method, and the fuzzy membership values were calculated by combining frequency ratio and fuzzy operator. The results of the landslide susceptibility evaluation were verified using landslide location data. The validation results showed satisfactory agreement between the landslide susceptibility evaluation map and the existing data on landslide location.","PeriodicalId":417031,"journal":{"name":"International Symposium on Digital Earth","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127665529","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}