2013 21st International Conference on Geoinformatics最新文献_第5页

VegaCache: Efficient and progressive spatio-temporal data caching scheme for online geospatial applications VegaCache:用于在线地理空间应用的高效、渐进式时空数据缓存方案

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626103

Yunqin Zhong, Jinyun Fang, Xiaofang Zhao

{"title":"VegaCache: Efficient and progressive spatio-temporal data caching scheme for online geospatial applications","authors":"Yunqin Zhong, Jinyun Fang, Xiaofang Zhao","doi":"10.1109/Geoinformatics.2013.6626103","DOIUrl":"https://doi.org/10.1109/Geoinformatics.2013.6626103","url":null,"abstract":"With the emergence of online geospatial applications such as WebGIS services, the large spatio-temporal data and numerous concurrent users have posed grand challenges on the state-of-the-art spatial databases due to their intolerable disk I/O latency. Hence, the clients cannot be served with real-time response. In this paper, we propose VegaCache, a distributed in-memory caching scheme, to provide low-latency access for time-critical geospatial workloads. VegaCache has three significant characteristics. First of all, it is composed of tunable memory pools maintained by commodity cluster and thus its capacity can be increased linearly with more nodes. Moreover, a data replacement model is designed to determine loading hotspot data into and swapping out victim data from the distributed cache. In addition, we design a localized caching model to reduce data transfer delay with consideration of geographic proximity and geospatial access patterns. Comprehensive experimental results show that VegaCache is able to provide sustained I/O throughput and high efficiency access and thus could meet the requirements of geospatial applications.","PeriodicalId":286908,"journal":{"name":"2013 21st International Conference on Geoinformatics","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116941411","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}

引用次数: 1

Intelligent loading of code modules based on the users' historical operating log in GIS software GIS软件中基于用户历史操作日志的代码模块智能加载

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626124

Haoran Li, Yong Gao, Hao Yu, Lei Liu, Xiao Guo

引用次数: 0

The spatial distribution of global urban heat island intensity and the influence of urban sprawl 全球城市热岛强度空间分布及城市扩张的影响

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626085

Yaoping Cui, Yaochen Qin

{"title":"The spatial distribution of global urban heat island intensity and the influence of urban sprawl","authors":"Yaoping Cui, Yaochen Qin","doi":"10.1109/Geoinformatics.2013.6626085","DOIUrl":"https://doi.org/10.1109/Geoinformatics.2013.6626085","url":null,"abstract":"With significant urbanization effects, the urban heat island effect has been reported in many cities. There are many related researches on urban heat island effect in a single city or urban agglomeration. In this paper, MODIS land surface temperature products, maps of global urban extent, gross domestic product, and population data were used to analyze the relationship between urban heat island intensity and urban sprawl factors. The results showed that: (1) the distribution of global urban heat island intensity existed obviously spatial heterogeneity, and the dominant impact factor of urban sprawl on urban heat island intensity in different regions was different. (2) Urban heat island intensity mainly were related to the human activities (gross domestic product and population), while the impact of urban shape characteristics (urban area and urban shape index) were limited. Therefore, to a certain extent it may be possible to keep the urban heat island intensity down under well-organized urban sprawling. (3) Urban heat island intensity could not be fully explained by urban sprawl factors only, other factors such as climatic factors still played an important role.","PeriodicalId":286908,"journal":{"name":"2013 21st International Conference on Geoinformatics","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116077688","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}

引用次数: 4

Chongqing urban ecological flood control study of river basin 重庆城市流域生态防洪研究

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626064

J. Dai, G. Zeng, Lingyun Li

{"title":"Chongqing urban ecological flood control study of river basin","authors":"J. Dai, G. Zeng, Lingyun Li","doi":"10.1109/Geoinformatics.2013.6626064","DOIUrl":"https://doi.org/10.1109/Geoinformatics.2013.6626064","url":null,"abstract":"In the process of city expansion, irrational development brings about serious phenomenon, such as filling lakes to make land and occupation of the riverway, which results in shrinkage of urban rivers and lakes, decline of flood discharge capacity, weakening of water holding capacity of lakes, and reduction of areas of wetland and greenbelt. The flood control and retention capacity of the original ecosystem reduces, thus the frequency of flood disaster and extent of damage are aggravated. This article explains the close relationship between urbanization and urban flood disaster by discussing the formative factors of climate changes and urban flood disaster, and studying the formation mechanism of urban flood disaster. On the basis of studying the overall arrangement and flood control function of rivers, lakes, wetlands, and greenbelts, this article provides an idea of urban ecological flood control and analyzes the ecological flood control pattern of main urban areas of Chongqing by comprehensive utilization of GIS. The results show that the major transformation direction of main urban areas of Chongqing is transforming from cultivated land to urban construction land. Along with the completion and impoundment of the Three Gorges Project, water level of the upstream of the Yangtze River is rising continuously and there is a trend of increasing year by year in the water area of Chongqing section.","PeriodicalId":286908,"journal":{"name":"2013 21st International Conference on Geoinformatics","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115052514","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}

引用次数: 1

Integration of association-rule and decision tree for high resolution image classification 基于关联规则和决策树的高分辨率图像分类

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626123

Ziyong Zhou, Yang Zhang

{"title":"Integration of association-rule and decision tree for high resolution image classification","authors":"Ziyong Zhou, Yang Zhang","doi":"10.1109/Geoinformatics.2013.6626123","DOIUrl":"https://doi.org/10.1109/Geoinformatics.2013.6626123","url":null,"abstract":"Association rule is one of the most important rules in nature. Each type of object in a remotely sensed image relates to special association rules, thus association rules are important features for image classification, and the mining and rational selection of the effective rules is the key issues for accurate classification. In this paper, an approach that integrates association rules analysis and decision tree is presented and applied to object-oriented high resolution image classification. The association rules analysis is adopted for mining strong rules from an image, and the decision tree is for finding the optimal rules for classification. A Geoeye-1 image is used for experimental data. Firstly, the Geoeye-1 image is segmented, then spatial, spectral, textural, color space and band ration features are selected. The association rules in a training set are mined, and a decision tree is designed with consideration of confidence, support of mined rules, as well spectral complexity and the generation sequence of rules. The visual comparison with the results of K-nearest neighbors and accuracy estimation validate the effect of the proposed approach.","PeriodicalId":286908,"journal":{"name":"2013 21st International Conference on Geoinformatics","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115392377","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}

引用次数: 7

The Characteristics of wetland evolution in Nansi Lake region 南四湖区湿地演化特征

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626040

F. Meng, M. Yu, Rui Zhang

引用次数: 0

Spatial differentiation of urban carbon emissions — An exploratory spatial data analysis in Beijing 城市碳排放的空间分异——北京城市空间数据的探索性分析

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626146

Lijun Zhang, Yaochen Qin, Jinping Zhang, Chaojun Lu

引用次数: 3

A cooperative framework for geological interpretation of remote sensing image 遥感影像地质解译合作框架

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626031

Minying Mo, Xuedong Wen, Yuan Tian, Yong Gao

引用次数: 0

The method for calculating exterior orientation parameters of the image based on straight line features and precision analysis 基于直线特征和精度分析的图像外定向参数计算方法

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626028

Zhiqing Liu, Zhaohui Xu, Baoming Zhang, Haitao Guo, Pengcheng Li

引用次数: 1

Thin cloud removal of ZY-3 image based on improved homomorphism filtering method 基于改进同态滤波方法的ZY-3图像薄云去除

2013 21st International Conference on Geoinformatics Pub Date : 2013-06-20 DOI: 10.1109/Geoinformatics.2013.6626097

Xiaoping Wu, Wunian Yang, Guoming Li

引用次数: 9