2009 17th International Conference on Geoinformatics最新文献_第4页

One rasterization approach algorithm for high performance map overlay 一种高性能地图覆盖的栅格化方法算法

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293561

Hui Dong, Zhenlin Cheng, Jinyun Fang

引用次数: 6

Integration of geospatial information for mobile and services devices 移动和服务设备的地理空间信息集成

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293553

Érick López-Ornelas, Fernando Farfan-Olvera

引用次数: 0

Design and implementation of a location awareness system for field police work 现场警务工作位置感知系统的设计与实现

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293007

Duansheng Chen, Yongquan Du, Yibao Zhang

引用次数: 2

Spatial interpolation via GWR, a plausible alternative? 通过GWR的空间插值，一个合理的选择?

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293526

Danlin Yu

{"title":"Spatial interpolation via GWR, a plausible alternative?","authors":"Danlin Yu","doi":"10.1109/GEOINFORMATICS.2009.5293526","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293526","url":null,"abstract":"Spatial interpolation can be done through either univariate methods that rely solely on the spatial structure of the data or by combining the spatial information and attribute information. Geographically weighted regression, although is used primarily in modeling the spatially varying relationships, falls within the category of combining both spatial and attribute information to interpolate unknown values. Using both artificially generated data with predefined parameters and actual house data from the City of Milwaukee, this study evaluates the interpolation accuracy of the univariate interpolation method represented by ordinary Kriging and multivariate interpolation represented by regression Kriging and GWR interpolation. It is found that by including relevant auxiliary variable(s), RK and GWR interpolations yield more accurate results than the univariate interpolation method, though the subtlety of how the spatial structure is assumed produces slight difference between RK and GWR. This study suggests GWR can serve as a useful alternative interpolation method in data analysis in addition to providing more detailed understanding of the spatially varying relationships between target and auxiliary variables.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"108 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":"117127009","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: 5

Crop phenology date estimation based on NDVI derived from the reconstructed MODIS daily surface reflectance data 基于重建MODIS日地表反射率数据NDVI的作物物候期估算

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293522

Hu Zhao, Zhengwei Yang, L. Di, Lin Li, Haihong Zhu

{"title":"Crop phenology date estimation based on NDVI derived from the reconstructed MODIS daily surface reflectance data","authors":"Hu Zhao, Zhengwei Yang, L. Di, Lin Li, Haihong Zhu","doi":"10.1109/GEOINFORMATICS.2009.5293522","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293522","url":null,"abstract":"Crop phenological stage estimation based on remote sensing data is critical for evaluating crop progress, condition and crop yield. However, the coarse spatial and temporal resolutions of multi-day composited data products limit the phenology estimation accuracy. The finer resolutions mean more variations in the data. To solve this dilemma, this paper proposes to use NDVI and its derivatives derived from the 250m MODIS daily surface reflectance data MOD09GQ to estimate crop phenology stages. In this paper, the contaminated data of MOD09GQ are first filtered out using quality flag and cloud information from MOD09GA. The missing data are reconstructed with linear interpolation. To remove noise and to generate differentiable NDVI curve, a new temporally and spatially iterative smoothing procedure that uses Savitzky-Golay filter and area averaging is proposed and the double logistic function fitting method is also presented as a comparison. The phenology stages such as emerged, maturity, and harvest dates are detected from the NDVI curve and its derivatives while other phenological stages that are not characterized by NDVI and its derivatives are indirectly derived from all known information. The initial experimental results indicate that the overall mean error of phenological stage estimation is less than 2 weeks for both corn and soybean, which are better than the results produced using temporal composited products as reported by existing papers. The experimental results for corn and soybean phenological estimation also indicate that different denoising techniques may lead to different results on diverse land cover types.","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":"115749250","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: 23

An accelerated approach to create 3D Web cities 一种加速创建3D网络城市的方法

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293461

Lifeng Liu, Jinyun Fang

{"title":"An accelerated approach to create 3D Web cities","authors":"Lifeng Liu, Jinyun Fang","doi":"10.1109/GEOINFORMATICS.2009.5293461","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293461","url":null,"abstract":"Creating 3D city from the geographical information is an important goal in the field of visualization for GIS and the needs for Web GIS are growing and expanding rapidly. Many scenes of the 3D cities are built based on the models which are made by computer aided designing software to present real scenes, however, this method costs too much time and labor with the low efficiency. This paper presents a method that can promptly construct a 3D city on the Web according to the geographical information. Our approach uses the descriptions for the city from the geographical and additional information to construct the scene and divides the buildings into “molecule parts”. With the bottom-up process from cursory objects to fine buildings to assemble the whole scene, the patterns correspond to Web environment which needs the distributed data management and gradual transmission. Ever divided part which can be classified into the common types and saved into distributed storage environment is constructed according to its characteristics. In addition, we first establish abstract databases to store and classify various “molecule parts” which are created based on geometrical arithmetic, common objects and small models. The descriptive information specifies the data from database, which just need loading rather than producing, with lower cost of time and labor. Our approach designs a processing assembling method to match the different parts of building and the level of matching can be elaborated further with the expanding interfaces. Our approach shares and reuses the resources for rendering, such as geometrical structures, materials, textures and even the small models, to diminish the amount of data and the influence of network delay. Experimental results show that our approach increases the speed for rendering and decreases the transmission capacity greatly. Our approach is appropriate for the Web environment to improve the rendering efficiency and for promptly creating a 3D city.","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":"115903246","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: 5

Geospatial data grid with computational capability 具有计算能力的地理空间数据网格

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5292844

Hao Chen, D. Goodenough, Aimin Guan, A. Charbonneau, R. Impey, W. Podaima, R. Sobie, A. Agarwal, B. Moa, I. Gable, P. Armstrong, R. Desmarais

{"title":"Geospatial data grid with computational capability","authors":"Hao Chen, D. Goodenough, Aimin Guan, A. Charbonneau, R. Impey, W. Podaima, R. Sobie, A. Agarwal, B. Moa, I. Gable, P. Armstrong, R. Desmarais","doi":"10.1109/GEOINFORMATICS.2009.5292844","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5292844","url":null,"abstract":"Grid-computing technology is used to solve large or complex computational problems on distributed computational resources belonging to multiple organizations regardless of their geographical locations. In this paper, we introduce an integration of the SAFORAH geospatial data grid, provided by the Canadian Forest Service, and the computational grids, offered by the University of Victoria and National Research Council Canada, using Globus Toolkit 4 (GT-4) as a common grid middleware. New GT-4 services, such as an Integration Service (IS), a Metascheduler Service (MS) and a Registry Service (RS) were designed and implemented. MS is a broker used to schedule jobs on many distinct computational clusters at the project partner sites. The RS is used to track the availability of resources at these sites. IS allows the data grid and computational grids to work together, so that users are able not only to access geospatial data directly from the SAFORAH data grid but also to create virtual image products on the fly using the computational grids. The new system is a prime example of sharing data and computational resources and collaborating between different organization and research communities. We envisage that the results of our system would be valuable to other projects that wish to combine large-scale data management systems with computational resources.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"171 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":"116127013","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: 0

A model driven framework for geographic knowledge discovery 地理知识发现的模型驱动框架

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293412

Octavio Glorio, J. Zubcoff, Juan J. Trujillo

引用次数: 3

Finding cold wakes of hurricanes Gustav, Hanna, and Ike (August – September, 2008) and Katrina (August 2005) using three-day composites of Sea Surface Temperature from TRMM's TMI 利用TRMM的TMI的三天海面温度合成数据，寻找古斯塔夫、汉娜和艾克飓风(2008年8 - 9月)和卡特里娜飓风(2005年8月)的冷尾流

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5292917

Sinclair Sheers

引用次数: 0

The Invasive Species Forecasting System 入侵物种预测系统

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293333

J. Schnase, N. Most, R. Gill, Peter L. A. Ma

引用次数: 2