简介：高压缩比率，高译码性能，和进步数据传播是为WebGIS的向量数据压缩算法的最重要的要求。满足这些要求，我们在场一条新压缩途径。这篇论文由把漂流坐标变换成整数坐标以多尺度的数据的产生开始。在屏幕上的变换的点和原来的点之间的距离在2个象素以内，这被证明，因此，我们的途径对顾客方面上的向量数据的可视化合适。整数坐标被传递给一个整数小浪变压器，并且高周波的系数由变压器生产了被正规哈夫曼代码编码。河数据和道路数据上的试验性的结果表明建议途径的有效性：为河数据的压缩比率罐头活动范围10%和20%为道路数据分别地。我们断定更多的注意需要被付到在包含一些点的弯曲之间的关联。

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：Hyperspectralimageprovidesabundantspectralinformationforremotediscriminationofsubtledifferencesingroundcovers.However,theincreasingspectraldimensions,aswellastheinformationredundancy,maketheanalysisandinterpretationofhyperspectralimagesachallenge.Featureextractionisaveryimportantstepforhyperspectralimageprocessing.Featureextractionmethodsaimatreducingthedimensionofdata,whilepreservingasmuchinformationaspossible.Particularly,nonlinearfeatureextractionmethods(e.g.kernelminimumnoisefraction(KMNF)transformation)havebeenreportedtobenefitmanyapplicationsofhyperspectralremotesensing,duetotheirgoodpreservationofhigh-orderstructuresoftheoriginaldata.However,conventionalKMNForitsextensionshavesomelimitationsonnoisefractionestimationduringthefeatureextraction,andthisleadstopoorperformancesforpost-applications.Thispaperproposesanovelnonlinearfeatureextractionmethodforhyperspectralimages.Insteadofestimatingnoisefractionbythenearestneighborhoodinformation(withinaslidingwindow),theproposedmethodexplorestheuseofimagesegmentation.Theapproachbenefitsbothnoisefractionestimationandinformationpreservation,andenablesasignificantimprovementforclassification.Experimentalresultsontworealhyperspectralimagesdemonstratetheefficiencyoftheproposedmethod.ComparedtoconventionalKMNF,theimprovementsofthemethodontwohyperspectralimageclassificationare8and11％.Thisnonlinearfeatureextractionmethodcanbealsoappliedtootherdisciplineswherehigh-dimensionaldataanalysisisrequired.

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简介：在这份报纸，理论免费triaxial地球摇摆被开发，新结论被得出：Euler时期应该被第一种完全的椭圆形的积分实际上表示；免费极的运动的踪迹是椭圆形的，它的半未成年者和主要的轴的取向分别地与地球主要的轴A和B近似平行。另外，现在的理论证明有在蜡烛制造者的频率振幅调整的机制摇摆，它可能是解释在蜡烛制造者的振幅和时期之间的关联的一个候选人摇摆。

简介：AnimprovedtopographicdatabaseforKingGeorgeIsland,oneofthemostfrequentlyvisitedregionsinAntarctica,ispresented.AfirststepconsistedincombiningdatafromdifferentialGPSsurveysgainedduringtheaustralsummers1997～1998and1999～2000,withthecurrentcoastlinefromaSPOTsatelliteimagemosaic,topographicinformationfromexistingmapsandfromtheAntarcticDigitalDatabase.Fromthisdatasets,adigitalterrainmodel(DTM)wasgeneratedusingArc/InfoGIS.Inasecondstep,asatelliteimagemapatthescale1∶100000wasassembledfromcontourlinesderivedfromtheDTMandthesatellitemosaic.Alackofaccuratetopographicinformationintheeasternpartoftheislandwasidentified.AdditionaltopographicsurveyingorSARinterferometryshouldbeusedtoimprovethedataqualityinthatarea.TheGISintegrateddatabasewillbeindispensableforglaciologicalandclimatologicalstudiesandadministrativeandscientificpurposes.Infuture,theapplicationofGIStechniqueswillbemandatoryforenvironmentalimpactstudiesandenvironmentalmonitoringaswellasformanagementplansonKingGeorgeIsland.

简介：Thispapercalculatestheparametersofimagepositionandorientation,proposesamathematicalmodelandadoptsanewmethodwiththreestepsoftransformationsbasedonparallelrayprojection.Everystepofthemodelisstrict,andthemapfunctionofeachtransformationisthefirstorderpolynomialsandothersimplefunction.Thefinalcalculationoftheparametersisforthelinearequationswithgoodstatus.Asaresult,theproblemoftherelativityofimageparametercalculationissolvedcompletely.Someexperimentsarecarriedout.

简介：Weareinvolvedinanembarrassingsituationthatthelimitedcapa-bilityofautomatedfeatureextractionindigitalphotogrammetricsystemscannotsatisfytheincreasingneedsforrapidacquisitionofsemanticinformationforappli-cations.Facingthischallenge,anewtactic,Human-ComputerCollaborative（HCC）tactic,andacorrespondingnewmethod,Operator-ObjectDirected（OOD）method,areproposedforthedesignofasystemforfeatureextractionfromlargescaleaerialimages.Weholdthatinalmostalltechnicalcomplexsys-tems,fullautomationwillbeneithertechnicallyfeasiblenorsociallyacceptable.Thesystemshouldbedesignedtooptimizethroughthecooperativeoperationwithtwoagentsinthesystem:thehumanandthecomputer.

简介：质地分析经常在处理领域的图象被讨论，但是大多数方法在灰色级的图象或颜色图象以内是有限的，并且质地的现在的概念主要基于单身的乐队的灰色级的图象被定义。遥感图象的必要字符之一多维或甚至高度维，并且传统的质地概念不能为这些包含足够的信息。因此，一个合适的质地定义基于遥感想象，对追求必要，它是在这份报纸的第一讨论。这份报纸描述印射的模型光谱在用Markov随机的地(MRF)的二维的图象空格的向量，基于MRF，和分析建立multiband遥感图象的一个质地模型吉布斯的计算势能和吉布斯参数。进一步，这份报纸也分析传统的吉布斯模型的限制，比较喜欢避免参数的评价的一个新吉布斯模型，并且以后介绍为hyperspectral遥感图象的一个新质地分割算法。

简介：Theprocessingofnonlineardatawasoneofhottopicsinsurveyingandmappingfieldinrecentyears.Asaresult,manylinearmethodsandnonlinearmethodshavebeendeveloped.Butthemethodsforprocessinggeneralizednonlinearsurveyingandmappingdata,especiallyfordifferentdatatypesandincludingunknownparameterswithrandomornonrandom,areseldomnoticed.Anewalgorithmmodelispresentedinthispaperforprocessingnonlineardynamicmultiple-periodandmultiple-accuracydataderivedfromdeformationmonitoringnetwork.