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306200512ScienceofSurveyingandMappingVol130No16Dec:2004O12O22,,(,430079;,100101),,,,,,(MDM);;(GDF);SVGP28A1009O2307(2005)06O0030O031,CDMAGPRSGSMTDMACDPDEPGEWAP,,,,:CPU,[10],,,,,,(MDM,MobileDigitalMap)2MDMMDM,,,:211,()(),,[4],,GIS([2],Wi-Fi,[10][11]212,,,,,,,,1G2G215G,3G,4G,,[11][12]213,,,,flash,,,313V5V,3%,,MDM,,,,,,,MDM3MDM,MDM,,:311MDM,MDM,GDF,[5]MDM,GDF(,GDFRoad()©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[5]),MDM,GDF,,,MDM,,MDM,(,FeatureTheme),(,FeatureClass),GDF,ISOGDF41013(),()(GDF410),,,,,11,::JUNCTION(Junc_ID,Junc_AttrID);Junc_Attr,,:ROADELEMENT(Re_ID,Re_SJunc,Re_EJunc,Re_AttrID);()(,,)(),::,INTERSECTION(Insec_ID,Inse_ReID,Inse_Attr);Inse_ReID,,312,,MDM,MDM1),MDM,,MDM(),(),,,,[5],2),,,,,,,,[5]MDM:MDM,;MDM3),,[5],,,MDM,,,,,MDM313,[1],MDM,,MDMMDM,136©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,ScalableVectorGraphics)W3CInternetWebXMLSVG,,SVG,,,,[8]SVG,SVG,,(W3C)SVGMobileSVGCPU,,,SVGMobileSVGSVGTiny(SVGT),,;SVGBasic(SVGB),,PDA[6]CPU,SVG,MobileSVG,,SVGTSVGB,SVGBSVGSVG,SVGBasicSVGTinySVG,,SVG,,SVG,,[9](SMIL),2SVGMDMSDBEditorSVG,,SDBEditorDataPlat2form,,-,MDMSVG,(Shape)SVG,,SVG,;,,,,,,[7],:,SVG,SVG,,ShapeSVG,;ASP,Shape,dbf4,,,PDA,B/S,/?,[1]1Java[D][].:,20031[2],1[J].,2003,19(2):19-231[3]1MobileGIS[J].,2002,(3):8-101[4],1[J].,2001,12(2):58-621[5]1[M].:,20031[6]1MobileSVG[EB/OL].=2057,2004-02-281[7]1SVGWebGIS[EB/OL].[8],1WEBSVG[J].Computerera,2002(4):4-61:(1981-),,2002,2330©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(ChineseAcademyofSurveyingandMapping,Beijing100039ChinaWuhanUniversity,Wuhan430079,China)TheresearchoftechnologicalenvironmentandkeyissuesofmobiledigitalmapAbstract:Inrecentyears,mobilecommunicationtechnolo2gyhasbeengrowingvigorously,andvariousportableterminalshavebeenmassivelyusedandupgradedconstantly1Themobileinformationservicegetsdeeplytoeachcornerwherepeopleliveprogressively1Digitalmapfacesnewchallengeandthegoodop2portunityofdeeplydevelopment1Thispaperanalysesthenewtechnologicalenvironmentthatthedigitalmapfaces,discussesemphaticallyseveralkeyproblemsandfeasiblesolutionsofmo2biledigitalmap1Thenmakeanexpectationtotheapplicationofmobiledigitalmap1Keywords:MDM(mobiledigitalmap),communicationtechnology,GDF,SVGHEJing,QIQingOwen,HEZhongOyi(SchoolofResourceandEnvironmentalScience,WuhanUniversity;sti2tuteofGeographicalSciencesandNaturalResourceResearchofChineseAcademyofSciences)RotationparametersdeterminationofblockwithGPSvelocityfieldAbstract:Inthispaper,wededucedtheunitivemodeltodeterminetherotationanddeformationparametersofblockwithGPSvelocityfield1Onthebasisofthismodel,wecalculatedtheparametersofsix1OorderblocksinChinacontinentwithGPSve2locityfielddata1Keywords:rotationparameters;deformationparameters;GPSvelocityfieldPengBingResearchonthegroundtargetlocationcomparisonofbothspace2borneSARimagesAbstract:Inthispaper,theimagetargetlocationofspace2bornesyntheticaperturewasdeeplydiscussed1Thismethodutili2zesthespacecraftephemerisdataandRangeODopplerfrequencyinformationoftheSARechodatatoproduceanestimateofthegroundtargetposition,andalgorithmforrelativelocationisde2rived1TestswereconductedusingRadarsatandERSimagesandcomparingthedifferenceinacquiringorbitalslantrangeandDopplerparameter1Thisapproachhasanadvantageoverprevi2oustechniquesinthatitrequiresnoreferencepointsandisinde2pendentofspacecraftattitudeknowledgeorcontrol1Keywords:SpaceborneSAR;SAR;Targetlocation;TheRangeODopplerfrequencyZouLiOxing(TheInstituteofElectronics,ChineseAcademyofScience,Beijing100080,China)Researchonkeytechniqueofaerophotogrammetryflightmanage2mentsystembasedonGPSandGISAbstract:Asoneofmethodswhichobtainandupdatethegeographicaldata,aerophotogrammetryhasbeenusedwidely1Theoperationinvolvesmanyphases,andthephotographyinflightistheimportantphasethataffectthequalityofdatadirect2ly,theprecisionofmap,costandscheduleofprojectfinally1Toensurethequalityofaviationandmap,andraisetheautomationlevel,it’snecessarytodevelopasuiteofaerophotogrammetryflightmanagementsystembasedonGPSandGIS1ThispaperwilldiscusstheintegrationofGPS,GISandaerophotogrammetry,mainfunctionandkeytechniqueofthesystem1Keywords:Aerophotogrammetry;Flightmanagement;GPS;ApplicationprogramdevelopmentLiFei,ChuMeiOhua,DaiQiangOhua,ZhangLianOpeng(GeoinformationScience&EngineeringCollege,ShandongUniversityofScience&Technology,Qingdao,Shan2dong266510;ShanghaiApsarasSpaceRemoteSenseTechniqueCo1,Ltd1,Pudong,Shanghai201203;XuzhouNormalUniversity,XuzhouJiangsu221116)Anurbanchangedetectionmethodusingspectralandspatialfea2turesAbstract:Thecurrentresearchesonchangedetectionaremostlyfocusedonenvironmentalscopeusinglowspatialresolutionremotelysensedimagery,suchasseasonalchangedetectionofpasture,changedetectionofvegetationdistribution,disasterde2tection,landuseregularization,etc1However,alongwiththerapiddevelopmentofc