简介：因为在城市的区域的复杂变化，基于面具技术修改了CVA申请能使缩小非植被的效果变化并且在很大程度上在效率之上改善。而且，从方法收极的阴谋，有PVI的绝对尖、全部的大小的技术措施变化计算了根据线性与用3DG-S计算的least-squareestimation和GVI合适转变。最后，这应用在2002和2005与武汉的陆地卫星ETM+形象被执行，并且由错误矩阵估计了，以它能检测的方法94.91%改正的变化象素，和全部的一致系数Kappa能到达to0.85。评估结果演示趋势作为城市的植被的一种有效、有效的选择改变的这个新应用程序抽取。

简介：Aresearchonthathowthetopicofmobility,whichiscompletelydifferentbuttightlyrelevanttospace,providesnewapproachesandmethodssoastopromotethefurtherdevelopmentofgeographicinformationservices,willaccumulatebasicexperiencefordifferenttypesofrelativeinformationsystemsinthewidefieldsoflocationbasedservices.Thispaperanalyzesthemeaningofmobilityandthechangeforgeographicinformationservicemodel,itdescribesthedifferencesandcorrelationbetweenM-GISandtraditionalGIS.Itsetsatechnicalframeworkofgeographicinformationservicesaccordingtomobilecontextandprovidesacasestudy.

简介：GPS可降水蒸汽(PWV)的可行性基于相关系数是0.94的雷送和GPSPWV的比较被讨论，RMS是4.0公里。在在2004的中国大陆的PWV变化是有在紧张的花键的gridding方法的graphed，根据在中国的外壳监视器观测站网的GPS数据，与相关气象学信息结合了。根据在这个国家的降雨的年度数量的分发，PWV的全部的趋势从东南沿海岸地区正在减少到西北内陆，这能被结束。PWV到达它的最大值在期间7月和8月，和最小在1月和2月期间被到达。根据PWV，从对low高，所有区域能作为东南沿海岸地区，内陆和台地被评价。

简介：Becauseofquickdevelopmentofcities,theupdateofurbanGISdataisveryimportant.Changedetectionisthebaseofautomaticorsemi-automaticdataupdate.Onewayofchangedetectionsinurbanareaisbasedonoldandnewaerialimagesacquiredindifferentdurations.Thecorrespondingtheoryandexperimentsareintroducedandanalyzedinthispaper.Themainprocedureincludesfourstages.Thenewandoldimageshavetoberegisteredfirstly.Thenimagematching,basedonthemaximumcorrelationcoefficient,isperformedbetweenregisteredimagesafterthelowcontrastareashavebeenremoved.Theregionswithlowmatchingqualityareextractedascandidatechangedareas.Thirdly,theGaussian-Laplacianoperatorisusedtodetectedgesincandidatechangedareasonboththeregisteredimages,andthestraightlinesaredetectedbyHoughtransformation.Finally,thechangedhousesandroadscanbedetectedonthebasisofstraightlinematchingincandidatechangedareasbetweenregisteredimages.

简介：Onthebasisofstereoimageanalysis,thechangedetectionofman-madeobjectsinurbanareasisintroduced.Informationoftheheightofman-madeobjectscanbeappliedtoreinforcetheirchangedetection.BycomparisonbetweenthenewandoldDSMs,thechangedregionsareextracted.However,ouraimistodetectchangesofman-madeobjectsinurbanareaandfurtherinthepotentialareasbythemeansofline-featurematchingandgradientdirectionhistogram.TheexperimentsbasedontheaerialimagesfromJapanhaveproventhatthealgorithmiscorrectandefficient.

简介：Thispaperfocusesonaseriesofquantitativeanalysismodels,suchasgreyrelationalanalysismodel,hierarchicalclusteranalysismodel,principalcomponentanalysismodel,linearregressionmodelandelasticcoefficientmodel.Thesemodelsareusedtoanalyzethecomprehensivefunctionandeffectofdrivingforcessystemically,includinganalysisonfeatures,analysisfordifferentiatingtheprimaryandthesecondary,analysisoncomprehensiveeffects,analysisofelasticity,analysisofprediction.Theprimaryandcharacteristicfactorscanbeextractedbyanalysisoffeaturesandanalysisfordifferentiatingtheprimaryandthesecondary.Analysisonpredictionandelasticitycanpredicttheareaofcultivatedlandinthefutureandfindoutwhichfactorsexertgreatinfluenceonthecultivatedlandsupply.

简介：Uptonow,detailedstrategiesandalgorithmsofautomaticchangedetectionforroadnetworksbasedonGIShavenotbeendiscussed.Thispaperdiscussestwodifferentstrategiesofautomaticchangedetec-tionforimageswithlowresolutionandhighresolutionusingoldGISdata,andpresentsabufferdetectionandtracingalgorithmfordetectingroadfromlow-resolutionimagesandanewprofiletracingalgorithmfordetectingroadfromhigh-resolutionimages.Forfeature-levelchangedetection(FL-CD),aso-calledbufferdetectionalgo-rithmisproposedtodetectchangesoffeatures.SomeideasandalgorithmsofusingGISpriorinformationandsomecontextinformationsuchassubstructuresofroadinhigh-resolutionimagestoassistroaddetectionandextractionaredescribedindetail.

简介：在从多时间的SAR图象产生的一幅木头比率差别图象考虑空间上下文的信息的一个无指导的变化察觉方法被建议。提起的AMarkov随机(MRF)模特儿特别地被雇用在附近的象素之中利用紧张层次的统计空间关联。在在木头比率差别图象的象素和混合Gaussian分发的独立的假设下面，一个随机、反复的EM-MPMchange-detection算法基于一个MRF模型被开发。EM-MPM算法基于以后的marginals(MPM)的maximiser为图象分割和期望最大值(他们)的算法为以一个完全自动的方法的参数评价的算法。在多时间的ERS-2SAR图象上获得的实验结果显示出建议方法的有效性。

简介：ThispaperpresentsaframeworkforroadnetworkchangedetectioninordertoupdatetheCanadianNationalTopographicDataBase(NTDB).ThemethodologyhasbeendevelopedonthebasisofroadextractionfromIRS-panimages(witha5.8mspatialresolution)byusingawaveletapproach.Thefeaturematchingandconflationtechniquesareusedtoroadchangedetectionandupdating.Elementaryexperimentshaveshowedthattheproposedframeworkcouldbeusedfordevelopinganoperationalroaddatabaseupdatingsystem.