简介:InterferometricSyntheticApertureRadar(InSAR)allowsproductionofhighresolutionDEManddetectionofsmallearthmotionsusingmultiplepassSARdatasetsobtainedbyremotesensingsatellite.ButthewholeprocesshasnotyetreachedsufficientrobustnesstowarrantautomatedDEMproductionascommonlyproducedbystereovisionwithopticalimages.TheautomaticalgorithmforprecisionregistrationisoneofthebottlenecksinInSARdataprocessing.Inthispaper,anautomaticapproachwithmulti-stepimagematchingalgorithmispresented.Allproceduresareautomaticallyimplemented.TheexperimentiscarriedoutsuccessfullywithSIR-C/L-bandInSARdata.Thetriangularpiecewiserectificationisalsoadvancedinreducinglocaldistortionbetweentheimagesandprocessingthelargesceneimage.Theprimaryresulthasprospectintheprecisionregistrationfortherepeat-trackInSARdataandrevealsthepotentialofthepresentedautomaticstrategy.
简介:Adoptingaprincipleof“check-acceptforthefirstrank,inspectionforthesecondrank”,thispaperbrieflydiscussestherationaleofthesamplinginspectionandthesamplinginspectionschemestodigitalproductsinGIS.TheOCcurveisdrawntoexplainthedeficiencyofthepercentsamplinginspection.Meanwhile,themethodofOneTimeLimitingQualityofcountselectionispresentedastheinspectionschemeforproductiondepartmentswhilethemethodofOneTimeAfter-inspectionMeanPercentDefectiveUpperLimitofcountselectionisforacceptancedepartments.
简介:Ithasbeendebatedthatwhichofrasterandvectoristhemosteffective,fromtheviewpointsofstorageefficiency,processingefficiency,andabilitytocapturetheessenceofgeographicspaceforanapplication.Theremaybenoclearanswertothisdebate.Itseemsappropriatetonotethatthemaindifferencebetweenthemrelatestothedegreetowhichthespatialentitiesofinterestareexplicitinthedata. Ingeneral,rasterremotesensingimageallowstheinvestigatortomeasureandmonitorsurfaceelectromagneticwavevariationinwhichmostobjectsandthespatialinterrelationshipsbetweenthemareimplicit.Inpractice,therearemanypoorlyunderstoodtradeoffsincouplingremotesensingdatatoexistingthematicmaps.Mapsusepointsandlinestorepresentselectedfeaturesoftheenvironmentinageneralizedfashion,buttheobjectssuchasindividualpolygons,linesandpointswithinanimagearetypicallyunknown. TheintegrationofremotesensinginformationintoaGISoccursnaturallyinarasterGISbecausebothdatastructuresareapproximatelythesame.Integrationintoavectorsystemrequiressomewhatmoreeffort,butithasbeenrecentlyachievedbyseveralGISandremotesensingvendors.Whenoneisstoringalargeamountofimagedatarelatedtosomeapplicationsintoaspatialdatabasesystem,itisnotpossibletoprocessthedataandtoobtainpolygonalrepresentationsofallobjectsthatwillbeofinteresttousersinadvance.Ontheotherhand,itmightbeofgreatvalueinsuchasystemtohaveavectorrepresentationofcertainimportantobjects.Forthisapplication,oneneedstodesignasystemwithbothrasterandvectorcapabilities,aswellastoolstointerrelatethem.Especially,asinFig.1,weneedtoprocessbothrasterandvectorsimultaneously. Asdescribedabove,whileaspatialinformationsystemmayhaveseveraldatastructures,thesystemcouldbeextendedinseveralwayswhichcorrespondtothefollowingdifferentproperties(seeFig.2): 1)Thestuructureinforma
简介:Thispaperadvancesanewsimplifiedformulaforestimatingvariancecomponents,sumsupthebasiclawtocalculatetheweightsofobservedvaluesandacirculationmethodusingtheincreamentsofweightswhenestimatingthevariancecomponentsoftraversenets,advancesthecharicteristicrootsmethodtoestimatethevariancecomponentsoftraveresnetsandpresentsapracticalmethodtomaketworealandsymmetricmatricestwodiagonalones.
简介:Syntheticapertureradarinterferometry(InSAR)hasbeenusedasaninnovativetechniquefordigitalelevationmodel(DEM)andtopographicmapgeneration.Inthispaper,externalDEMsareusedforInSARDEMgenerationtoreducetheerrorsindataprocessing.TheDEMsgeneratedfromrepeat-passInSARarecompared.Forsteepslopesandseverechangesintopography,phaseunwrappingqualitycanbeimprovedbysubtractingthephasecalculatedfromanexternalDEM.ItisaffirmativethattheabsoluteheightaccuracyoftheInSARDEMisimprovedbyusingexternalDEM.Thedataprocessingwasundertakenwithouttheuseofgroundcontrolpointsandothermanualoperation.
简介:Onthebasisoftheresearchofthecartographicmodelsmadebytheauthorssomeyearsago,thispaperfurtherstudiestheestablishmentofcartographicfuzzymatrixtomaketheconceptsincartographye.g.,selection,deletion,mappinggeneralizationandimagetranformation,intosomeprecisemathematicalexpressions.
简介:警犬城市的生长模型被用来模仿未来城市的生长模式并且在沈阳城市里在开发的不同条件下面探索城市的开发的潜在的环境影响,中国。警犬模型与从TM卫星图象的一个时间系列提取的历史的数据(19882004)被校准,并且未来生长外面被投射到2030假定三种不同政策情形:(1)当前的趋势情形(情形CT),(2)地区性的政策和城市的计划情形(情形PP),并且(3)环境保护情形(情形EP)。情形分析证明城市的生长将在2016以后在发展模式和可持续性与重要差别在所有政策情形下面加速。在情形CT下面的城市的开发将在另外的二种情形下面比那导致资源陆地的实质的损失,并且城市的风景模式将逐渐地复杂、分散。相反,在情形PP和EP下面的城市的生长将消费不太自然的资源土地并且在预言时期期间显示出一个相对紧缩的城市的发展模式。这研究建议拿紧城市的计划是关键的,管理测量城市的生长到控制未来并且在沈阳城市里保护主要农田和城市的生态学的支持系统。警犬模型是一个有用计划工具指导城市的陆地资源的持续利用到某个程度。
简介:ThepolicyoftheChinesegovernmentconcerningthehorizontalexpansionofthecultivatedlandthroughthereclamationofdesertsoilsresultinatotalincreaseof665.985km2duringtheperiod1987-1999inNorthShaanxi.Thisincreaseislessthanthelossinarablelandbyurbanization.Theacceleratedrateofchangeinagriculturalareascallsformorerapidsurveysofurbanizationandlossofarableland.Remotesensinghasanumberofadvantagesoverground-basedmethodsforsuchsurveys.Themulti-scaleconceptofremotesensingdatahelpusstudytheprobleminfourtowns.Severalmapswereproducedtoanalyzethesituationofurbancoverageindifferenttimes.Theevaluationofthestatus,rateandriskofurbanizationarebasedonanacceptedaverageofurbanincreaseas2%ofpopulationgrowthperyear.
简介:Thispaperintegratesgeneticalgorithmandneuralnetworktechniquestobuildnewtemporalpredictinganalysistoolsforgeographicinformationsystem(GIS).ThesenewGIStoolscanbereadilyappliedinapracticalandappropriatemannerinspatialandtemporalresearchtopatchthegapsinGISdataminingandknowledgediscoveryfunctions.ThespecificachievementhereistheintegrationofrelatedartificialintelligenttechnologiesintoGISsoftwaretoestablishaconceptualspatialandtemporalanalysisframework.And,byusingthisframeworktodevelopanartificialintelligentspatialandtemporalinformationanalyst(ASIA)systemwhichthenisfullyutilizedintheexistingGISpackage.Thisstudyofairpollutantsforecastingprovidesageographicalpracticalcasetoprovetherationalizationandjustnessoftheconceptualtemporalanalysisframework.
简介:OnthebasisofthecharacteristicoftheperfectspatialdistributionoftheT/Paltimeterdata,aspatialharmonictidalanalysisisperformed,whichtransferstidalharmonicconstantsHandgofeachconstituentintoapairofparameters:thecosinepartUandsinepartV.Andeachpartisexpandedintoapolynomial.Thepolynomialcoefficientsareestimatedwithaltimeterdataupontheleastsquarescriteria.ThusthemodelsofprincipaltidalwavesintheSouthChinaSeaareestablished.72cyclesofT/Pdatafromcycle11through82areincludedinthecalculation.Themodelsareevaluatedwithdifferentapproachesanddataset.Theconclusionsarethatthetidemodescanprovidepartialtideamplitudeswith3cmaccuracy,andthatphaselagsdeviationofthosetideswithamplitudelargethan10cmarewithin±10°.
简介:在顺序地层学和litho-paleogeography的学习,定量分析,精确计算和巨大的地质的数据的详细比较例如领域侧面,从不同区域记载记录和地震曲线,是基本要求。为了获得可靠、精确的更多,结果,这份报纸论述把空间数据库分析与单个因素的印射技术相结合建立的一个新奇方法定序地层学的继任并且印射Ordos盆的奥陶纪litho-paleogeography,在诺思中国忍受盆的最大的油气体之一平台。由使用这个方法,所有相关基本地质的数据能是分析并且有效地设法的份量上。基本stratigraphic单位和他们的人物的各种各样的属性penecontemporaneousdolostone内容,浅水粗涂内容,和源自陆地的材料例如顺序厚度,满足,能充分在外形分析并且在印射统计上被利用。把分析基于这,这份报纸被施加了为每奥陶纪印射份量上的单个因素的isopachous在盆,和最后综合的多重因素定序重建为每顺序间隔的litho-paleogeography。学习证明建议方法是相当有效的并且在与传统的方法相比认出litho-paleogeographic子单元有一个高得多的决定。在Ordos盆的中间的奥陶纪顺序间隔(在更低的Majiagou形成的SQ19)之一,例如,作者成功地开发了一个数学公式实质地划分各种各样的外形单位的分发,例如旧陆地,潜水艇高举,supratidal地区,intertidal地区和subtidal地区。
简介:光合地活跃的放射(同等)的大小,为模仿植物生长和生产率不可缺少,通常是很少见的。这研究试图为估计在波伊昂·莱克公民自然保护区以内到达地球表面的每日的同等比较二个推测和推测插值方法,中国。在南昌气象学的车站的每天全球的太阳的放射记录和在在波伊昂·莱克附近的九个气象学的车站的每日的阳光持续时间大小被获得完成目的。使用的同等的二个推测方法记录了并且估计分别地,在自然保护区附近的南昌车站和三个车站(Yongxiu,Xingzi和Duchang)的全球太阳的放射被执行并且联合triangulated的一个空间插值方法不规则的网络(锡)和反的距离weighting(IDW)被实现估计每日的同等。用同等的三个方法的表演评估在Dahuchi保存车站测量了(测量=的天数字105天)揭示了那:(1)空间插值方法完成了最好的同等评价(R2=0.89,s.e=0.99,F=830.02,P<0.001);(2)来自南昌车站的推测方法获得了不偏的结果(R2=0.88,s.e=0.99,F=745.29,P<0.001);然而,(3)从Yongxiu,Xingzi和Duchang车站的推测方法不对为他们的偏导的评价的这个特定的地点合适。就支持推测和插值方法的假设和原则而言,作者断定空间插值方法比推测方法生产更可靠的结果并且在所有测试方法,和更多的同等大小保持最大的潜力应该被记录评估季节,为他们到波伊昂·莱克的整个自然保护区的申请的这些模型的每年、空间的稳定性。
简介:Inthatorchardinginearly-to-midtwentiethcenturysoutheasternAustraliainvolveduseofcertainheavymetalandAscompoundsinregularpest-controlsprayprocedures,someinterestattachestothepossibilitythattheselandparcelsareunderlainbysoilswithabove-backgroundCu,PbandAslevels.InterpretationofLand-coverchangesallowedlandparcelspreviouslyoccupiedbyorchardstobeidentifiedinthe1950sthroughtime-seriesair-photos.Acomparisonofsoilanalysisresultsreferringtosoilsamplesfromcontrolsites,andfromlandparcelsformerlyoccupiedbyorchardists,showsthatcontamination(above-background)levelsofcationsinthepesticidescanbefoundinthetop6cmofformerorchardsoils.Itisclearthatdigitalspatialdatahandlingandculturally-informedairphotointerpretationhasaplaceinsoilcontaminationstudies,land-useplanning(withparticularreferencetore-development)andinadministrationofpublichealth.