2009 17th International Conference on Geoinformatics最新文献

{"title":"Stability maps for really exploitable automatic classification results","authors":"E. Frontoni, A. Bernardini, E. Malinverni, A. Mancini, P. Zingaretti","doi":"10.1109/GEOINFORMATICS.2009.5293443","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293443","url":null,"abstract":"The paper describes a new methodology for producing really exploitable results from automatic classification algorithms. The output of these algorithms is usually constituted by an image with each region assigned to one out of n classes. If the end user, on the basis of results obtained from a control set provided with a ground truth, simply knows that classification over the whole dataset can be considered correct at, for example, 85% (s)he cannot know where correct and erroneously classified regions are really located in the whole dataset. Obviously, the result obtained can be exploited to effectively compute global indexes over the dataset, but it cannot be used as a thematic map. Thus, in addition to the assignment of a class to each region we propose an approach that provides a stability map, a binary image that separates regions (S) classified with high accuracy from those (U) whose classification result should be verified before being used. Two further benefits derive from the construction of the stability map: the control set can be used to set up a good threshold for binarizing the stability map (that is, a threshold by which all regions S are effectively correctly classified); unreliable regions U can help the end user to identify principal causes of (types of regions leading to) misclassification and corresponding (fuzzy, neural, rule based, etc.) approaches to overcome them.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"21 47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129095968","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":"Using progressive transmission of 3D/4D geospatial information over the Internet to facilitate geovisualization in World Wind","authors":"Jing Li, Huayi Wu, C. Yang, Jibo Xie, Qunying Huang","doi":"10.1109/GEOINFORMATICS.2009.5293460","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293460","url":null,"abstract":"Geospatial data are usually featured with threedimensions in space and fast evolvement with time. The delivery of a large volume of geospatial data requires a well built network environment. This fact also challenges the online visualization. In order to accelerate data transmission and rendering, progressive methods have been applied in this paper. A k-d tree structure is incorporated to construct the multi-resolution data model thus facilitating progressive transmission process. We implement the framework in a flexible disturbed system. Based on the experiment on dust simulation output, this manner is demonstrated to be an effective way to delivery geospatial data.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130788793","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":"A study of real-time identification and monitoring of barge-carried hazardous commodities","authors":"Y. Ling, Mingzhou Jin, M. Hilliard, J. Usher","doi":"10.1109/GEOINFORMATICS.2009.5293426","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293426","url":null,"abstract":"In response to increased terrorist threats related to hazardous material movements on the U.S. inland waterway system, towing vessel operators and fleet area managers, at specified reporting points, are required to notify the U.S. Coast Guard's Inland River Vessel Movement Center (IRVMC) of the movement of barges loaded with Certain Dangerous Cargo (CDC). The objective of this study is to develop and field test a prototype system that provides more accurate, uniform, and timely data on hazardous movements by barges, especially those certified as CDC, and to identify and report barges with potential security threats. The system being developed, namely TRACC, is expected to automatically track and monitor barges with CDC and communicate the real-time information to a data server. The event prediction and anomaly detection modules of the system will analyze the collected real-time data and other information to identify any potential security threats, and visually display locations and routes of suspicious barges. It will benefit homeland security community, first responders, local law enforcement personnel and business by providing timely and accurate barge information to make quick and right decisions in disasters involving CDC movement on the inland waterway.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131304230","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":"A dynamic schema matching approach for multi-version web feature service retrieve","authors":"Jie He, Nengcheng Chen, Wei Wang, Zeqiang Chen","doi":"10.1109/GEOINFORMATICS.2009.5293133","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293133","url":null,"abstract":"Web feature service is an important part of geospatial data interoperability and enables GIS data with different formats to be operated at feature-level. Open Geospatial Consortium (OGC) has already developed standard implementation specifications for web feature service, and for those web feature services with different versions, such as WFS1.1,WFS1.0. OGC also define different schemas. Different version web feature service has different schema and different version WFS service support different data formats, all these result in problems for interoperability among web feature service with different versions. Such as user only request some versions WFS service specified by WFS server, when WFS server find the request service version is not supported by it may cease communicating with user. In order to enable multi-version web feature service requests in a uniform interface, the paper design a service retrieve plug-and-play middleware to match different version schemas dynamically and automatically transform the XML result document into a form that meet the requirement of user request, ultimately to achieve WFS service request independence of service version. At end the whole system's schema matching quality and information retrieval efficiency have been tested successfully in GeoServer WFS services, the tested results show the feasibility of the designed approach.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128869777","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":"RS based study on urban expansion and its impact on city heat island effect in Chuxiong City in Yunnan, China","authors":"Yunyuan Yang, Zhengtao Shi, P. He, S. Tong, Chengdong Xu","doi":"10.1109/GEOINFORMATICS.2009.5293462","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293462","url":null,"abstract":"Based on the building areas information extracted from the multi-temporal Landsat data, city boundaries (measured by GPS on November 2008), land surface temperature (retrieved from band 6 of Landsat TM5 images) and year-book data, this paper discusses the urban expansion characteristics and their impact on the city heat island effect in Chuxiong City over the past 30 years. The urban expansion of Chuxiong City over the past 30 years could be divided into three periods: the slow development period from 1979 to 1991, the accelerated development period from 1992 to 2003 and the rapid development period from 2004 to 2008. In the past 30 years, the center of the city moved northward. The annual average expansion area increased from 0.4 km2 to l.21 km2, and the urban expansion and population rise flexibility index increased from 0.86 to 1.56 gradually. The built-up area has increased by 7 times, mainly by occupying the farmland and garden. Urban expansion has had a great effect on heat island effect in the past 30 years. The heat island effect hardly occurred before the 1980s. But in 1989, the temperature of urban areas was 0.5°C higher than that of suburbs, 1.1°C in 1999 and 1.35°C in 2007. The temperature of new town was 0.7°C higher than that of old town in 1999 and 0.1? in 2007. The hot island intensity in urban areas has increased, the temperature difference between new town and old town has reduced and the temperature of old town has also gradually increased in the past 30 years. At the same time, the distribution of city high-temperature zone has extended to the west of old town and industrial areas, and was significantly affected by human activities, topography and industry development. The distribution of low-temperature zone has changed from sporadic area to Longchuan River zone. (Abstract)","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125432550","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":"Integrated ground-based monitoring of dust aerosol from a semi-arid site in North China during 2004–2006","authors":"Dan Xu, S. Niu","doi":"10.1109/GEOINFORMATICS.2009.5293411","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293411","url":null,"abstract":"An observational study on dust-storm is performed according to the ground-based integrated monitoring system at a semi-arid site. For the automatic sun-tracking photometer, which has widely-acceptable retrieval accuracy, cloud influence stays still a problem for vertical atmosphere remote sensing. Multimodal distribution of optical depth thus appears during dust-storm event and brings out difficulty in confirming the peak value for dust aerosol, and even results in valid data missing. A fitting relationship between the measurements of visibility meter and sunphotometer is listed according to dust weather. Accuracy validation is carried out based on the cases during 2004-2006, with a correlation analysis using the measurements of PM10 monitor. Columnar aerosol size distributions are in consideration for a comprehensive explanation. The suggested result leads to a better understanding for dust aerosol characteristic and dust-storm pre-warning in despite of the cloud interference.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121428961","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":"A study of MODIS and AWiFS multisensor fusion for crop classification enhancement","authors":"Zhengwei Yang, Y. Ling, C. Boryan","doi":"10.1109/GEOINFORMATICS.2009.5293415","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293415","url":null,"abstract":"Accurate, robust, timely and complete remote sensing-based crop classification results are critical to the mission of the National Agricultural Statistics Service (NASS), United States Department of Agriculture. However, due to cloud coverage and limited budget, in many cases, there are not enough quality AWiFS image data available for performing a reliable multitemporal crop classification. To solve this problem, extra image data from other sensors are sought for fusing with AWiFS images for temporal compensation while preserving the high spatial and spectral resolutions. This paper attempts to assess the crop classification accuracy enhancement with AWiFS and MODIS multisensor, multispectral and intertemporal fusion. Three different image fusion methods: principal component analysis (PCA), intensity-hue-saturation (IHS) and image band stacking (IBS) are applied to perform intertemporal image fusion between the 56m AWiFS and the 8-day composited reflectance MODIS data (Red and NIR bands only) with 250m resolution from NASA to incorporate more spectral dynamic information from MODIS images for better crop classification. To make the two-band MODIS data applicable to IHS fusion, this paper proposes a novel combined fusion process, in which the MODIS green band is replaced with the AWiFS green band to create a new multispectral image for IHS transformation. The fused image from AWiFS and MODIS images, together with the original AWiFS multispectral image, are then fed into the decision tree classifier for multitemporal crop classifications in accordance with different fusion methods and temporal combinations. The crop classification accuracies of various classification experiments are assessed with respect to different image fusion methods and different temporal combinations and compared with the reference single AWiFS classification results. The experimental results indicate that properly using the fusion of intertemporal MODIS and AWiFS data improves the crop classification accuracy in large crop area when enough fused temporal images are used.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"301 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115872875","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":"Discover, visualize, and deliver geospatial data through OGC standards-based WebGIS system","authors":"Yaxing Wei, Suresh-Kumar Santhana-Vannan, R. Cook","doi":"10.1109/GEOINFORMATICS.2009.5293520","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293520","url":null,"abstract":"Geospatial data are important to understand the Earth — ecosystem dynamics, land cover changes, resource management, and human interactions with the Earth to name a few. One of the biggest difficulties users face is to discover, access, and assemble distributed, large volume, heterogeneous geospatial data to conduct geo-analysis. Traditional methods of geospatial data discovery, visualization, and delivery lack the capabilities of resource sharing and automation across systems or organizational boundaries. They require users to download the data “as-is” in their original file format, projection, and extent. Also, discovering data served by traditional methods requires prior knowledge of data location, and processing requires specialized expertise. These drawbacks of traditional methods create additional burden to users, introduce too much overhead to research, and also reduce the potential usage of the data. At the Oak Ridge National Laboratory (ORNL), researchers working on NASA-sponsored projects: Distributed Active Archive Center (DAAC) and Modeling and Synthesis Thematic Data Center (MAST-DC) have tapped into the benefits of Open Geospatial Consortium (OGC) standards to overcome the drawbacks of traditional methods of geospatial data discovery, visualization, and delivery. The OGC standards-based approach facilitates data sharing and interoperability across network, organizational, and geopolitical boundaries. Tools and services based on OGC standards deliver the data in many user defined formats and allow users to visualize the data prior to download. This paper introduces an approach taken to visualize and deliver ORNL DAAC, MAST-DC, and other relevant geospatial data through OGC standards-based Web Services, including Web Map Service (WMS), Web Coverage Service (WCS), and Web Feature Service (WFS). It also introduces a WebGIS system built on top of OGC services that helps users discover, visualize, and access geospatial data.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132550900","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":"Implementation of a pilot GIS for a volunteer-based water quality monitoring program","authors":"Timothy B. Love, Chris Trumbauer, C. Cole","doi":"10.1109/GEOINFORMATICS.2009.5293502","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293502","url":null,"abstract":"A pilot GIS has been implemented to provide value added analyses of geospatial water quality monitoring information at the West/Rhode Riverkeeper Organization, Inc. (WRR), an affiliate of the international Waterkeeper Alliance. This project has been developed in a manner to ensure sustainability for the organization and ease of use for non-experienced GIS users. Rather than focusing on a comprehensive implementation of spatial technologies, it is the intention that the project serves as a pilot study which must be sustainable and have its technology transferred to other Riverkeeper or similar watershed organizations in the region. Thus, the focus is directly to ensure that these GIS techniques be developed in such a manner to allow other water quality monitoring groups to seamlessly adopt them. The primary data incorporated into the project is obtained from part-time volunteers who reside in the study region and record weekly observations of water quality at discrete locations throughout the study domain. These data records are converted into spatial data format and ingested into COTS GIS software. In turn, a set of software operations has been formulated into simple automated tasks which W/R users may use to create their own analyses of water quality trends for dissemination to the public. Full documentation for all project aspects is provided and incorporated into a training program designed to ensure that all users understand and can easily use the spatial tools created within. This paper describes the planning and resultant implementation of the pilot GIS project developed for the West/Rhode Riverkeeper. This is an end-to-end development such that the system provides all aspects necessary for meeting the goals of a fully sustainable GIS given the lack of a pre-existing geospatial program. Described herein are considerations made with respect to software and hardware that will meet the long term needs of both the W/R organization and other Riverkeeper Organizations. Development of data inventories, including creation and maintenance of a geospatial database archive is described next. Creation of tools for non-technical staff to implement spatial manipulations is investigated, and a description of documentation and training activities conclude the presentation. It is the intention of this submission to provide a summary of tactics that may be used for other small, volunteer-based organizations to develop their own geospatial program without being subject to many trials and tribulations that were observed in this study.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132691323","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":"A study of point objects generalization based on rough sets technology","authors":"Lin Wenjing, L. Zhiyong, Wang Hong, Zhang Xiaotong","doi":"10.1109/GEOINFORMATICS.2009.5293466","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293466","url":null,"abstract":"On the basis of the existing methods of point object generalization, and in view of the inadequacy of existing methods, a rough sets idea to resolve the problem of point object generalization is put forward. After analyzing the relationship between the classification thinking of rough sets and map generalization, the feasibility of using rough sets method to generalize point object in map is explained. The methods and steps of generalizing point object with rough sets method are introduced; and the experiment is analyzed.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132838466","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}