2009 17th International Conference on Geoinformatics最新文献_第6页

Enterprise spatial data deployment strategies in a global engineering environment 全球工程环境下的企业空间数据部署策略

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293424

Tracy McLane, Yongmin Yan

引用次数: 3

On geo-social network services 地理社交网络服务

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293492

Qian Huang, Yu Liu

引用次数: 29

Object-based high-resolution land-cover mapping 基于目标的高分辨率土地覆盖制图

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293435

J. O'Neil-Dunne, Keith C. Pelletier, Sean MacFaden, A. Troy, J. Grove

{"title":"Object-based high-resolution land-cover mapping","authors":"J. O'Neil-Dunne, Keith C. Pelletier, Sean MacFaden, A. Troy, J. Grove","doi":"10.1109/GEOINFORMATICS.2009.5293435","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293435","url":null,"abstract":"There has been a marked increase in availability of high-resolution remotely-sensed datasets over the past eight years. The ability to efficiently extract accurate and meaningful land-cover information from these datasets is crucial if the full potential of these datasets is to be harnessed. Land-cover datasets, particularly high-resolution ones, must be statistically accurate and depict a realistic representation of the landscape if they are to be used by decision makers and trusted by the general public. Furthermore, if such datasets are to be accessible and relevant, mechanisms must exist that facilitate cost-effective and timely production. Object-based image analysis (OBIA) techniques offer the greatest potential for generating accurate and meaningful land-cover datasets in an efficient manner. They overcome the limitations of traditional pixel-based classification methods by incorporating not only spectral data but also spatial and contextual information, and they offer substantial efficiency gains compared to manual interpretation. Drawing on our experience in applying OBIA techniques to high-resolution data, we believe any automated approach to land-cover mapping must: 1) effectively replicate the human image analyst; 2) incorporate datasets from multiple sources; and 3) be capable of processing large datasets. To meet this functionality, an operational OBIA system should: 1) employ expert systems; 2) support vector and raster datasets; and 3) leverage enterprise computing architecture.","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":"132383607","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: 14

Earth observation and ecological security: An integrated multidisciplinary approach towards a regional inventory and monitoring 地球观测和生态安全:面向区域清查和监测的综合多学科方法

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293501

Yeqiao Wang, Zheng-fang Wu, Jiang Feng, Xing Yuan, Hongyan Zhang, Jiquan Zhang, Jia-wei Xu

引用次数: 0

Geospatial Information semantic retrieval algorithm Research based on geo-ontology 基于地理本体的地理空间信息语义检索算法研究

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293550

Wei Liu, Yunyan Du, Rulin Xiao

引用次数: 1

A novel feature ranking modelling in GIS context: Addressing complexity and cost issues GIS环境下一种新的特征排序模型:解决复杂性和成本问题

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293555

Alberto Gemelli, C. Diamantini, D. Potena

{"title":"A novel feature ranking modelling in GIS context: Addressing complexity and cost issues","authors":"Alberto Gemelli, C. Diamantini, D. Potena","doi":"10.1109/GEOINFORMATICS.2009.5293555","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293555","url":null,"abstract":"nowadays, there is the trend to carry out decisions and analysis on geospatial data by a massive computational approach. The amount of geospatial information available is increasing exponentially as result of the increasing interoperability between informative systems. In a multiplicity of applications and services spatial decision is carried out to pursue business goals, often without involving experts in geography. The informative systems have an increasing autonomous decisional capability on information selection and analysis. The demand is to have systems that require only an input goal, and produces decisions that humans can understand and integrate with their own decisions. In this paper it is proposed an automatic method of feature ranking, which can sort a heterogeneous set of features by their importance in accomplishing an analytical goal. This method produces a rank model that helps to select the minimal set of features needed to pursue a goal with a wanted accuracy or resources involvement. This feature ranking is expected to supports fundamental decisional making in elaborating geospatial data. The method is based on data mining algorithms; the obtained rank model appears to be spatially scalable and fits well to human form of knowledge.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"14 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":"131873280","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

Preparing of groundwater maps by using Geographical Information System 利用地理信息系统编制地下水地图

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293097

A. Najafabadi

引用次数: 0

Improvement of an aerodynamic roughness model with meteorological measurements and TM image 利用气象测量数据和TM图像改进气动粗糙度模型

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293452

Yanlian Zhou, Xiaomin Sun, W. Ju

{"title":"Improvement of an aerodynamic roughness model with meteorological measurements and TM image","authors":"Yanlian Zhou, Xiaomin Sun, W. Ju","doi":"10.1109/GEOINFORMATICS.2009.5293452","DOIUrl":"https://doi.org/10.1109/GEOINFORMATICS.2009.5293452","url":null,"abstract":"Aerodynamic roughness length (z0) is one of the main parameters for describing aerodynamic characteristics and turbulence exchange of underlying surfaces. It also plays a very important role in land surface fluxes simulation and atmospheric boundary layer studies. In fluxes and atmospheric numerical simulation models, z0 is usually considered as a simple parameter related to rough elements, while actually z0 is the result of aerodynamic and thermal factors and rough elements. Some researchers on z0 established a model to calculate effective roughness at TM pixel scale. But in the model, the length of the fetch is simply considered as 100 times of the highest measuring height, which results in much uncertainty of the model. With the development of eddy covariance observations and the footprint theory, fetch could be determined with more accurate footprint model. This paper aims to make an improvement for the model basing on footprint model, and clarify the relationship between z0 and air temperature, wind speed and geometric roughness. Firstly meteorological data in two different levels was obtained to calculate z0 and the calculated z0 was considered as the real value, and then the fetch length was calculated by FSAM footprint model. Secondly LAI was retrieved from TM image to calculate geometric roughness. Thirdly drag coefficient was taken into the roughness calculation model, and then a roughness calculation model was established with footprint model and LAI, vegetation height, atmospheric stratifications and drag coefficient. The result indicated that z0 is the function of thermal and aerodynamic factors, and the reason for roughness dynamic was interpreted thoroughly. The quantitative relationship between rough elements and aerodynamic and thermal factors is clarified, and a more accurate model for retrieving z0 at TM pixel scale could be established with the fetch determined by footprint.","PeriodicalId":121212,"journal":{"name":"2009 17th International Conference on Geoinformatics","volume":"151 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":"132247123","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

Improvement and optimization of Thiessen polygon method boundary treatment program Thiessen多边形法边界处理程序的改进与优化

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5293458

Qing Zhou, Gang Liu, Zhiting Zhang

引用次数: 4

Land use allocation optimization towards sustainable development based on genetic algorithm 基于遗传算法的可持续发展土地利用配置优化

2009 17th International Conference on Geoinformatics Pub Date : 2009-10-23 DOI: 10.1109/GEOINFORMATICS.2009.5292899

Cao Kai, Huang Bo, Zhao Qing, Wang Shengxiao

引用次数: 7