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1.
张东 《测绘科技》1998,(3):53-56
本文讨论了出版系统的发展,PostScript语言和EPS格式文件的特点,并探讨了部分相关技术的概念,构成及研究要点。  相似文献   

2.
张东 《测绘科技》1998,(4):49-51
汉字的应用问题是DTP系统中一个很重要的部分,而且在处理的过程中也容易出错,本文分析了DTP系统中汉字的分类,数学描述方法,计算机中的表达及其处理特点,特别是用Postscript语言描述的汉字的特点以及字库保障方面的问题。  相似文献   

3.
1 IntroductionTherepresentationofspatialobjectsisoneofthekeyissuesincurrentresearchonthespatialdatabasetheoryofGIS (BurroughandMcDonnell,1 998) .Spatialobjectsinnatureareclassifiedastwokinds:objectswithdistinctiveboundariesandob jectswithtransitionalorfuzzy…  相似文献   

4.
1 WhatisAGDI?AtXXIVSCARmeetinginCambridge,inAugust1 996,theWorkingGrouponGeodesyandGeo graphicInformation (WG_GGI)agreedtoanewgeographicdataproject,termed‘geographicdataintegration’ .Theinitialtaskwasto“developaSCAR proposalforthecollection ,integrationandpub…  相似文献   

5.
1 IntroductionCategoricalmapsrepresentanimportanttypeofdataincorporatedinGISs,whichdepictspatialdis tributionsinformofexhaustive,non_overlappingarealunitsseparatedbyboundarylines.Anassump tionunderlyingconventionalcategoricalmappingistheobject_basedview…  相似文献   

6.
1 IntroductionSpatialdataisthebasisoftheGeographicInfor mationSystem (GIS)andnon_spatialdataistheintensionandthedescriptionofgeographiccell.Thequalityofdataaffectsgreatlyontheresultofapplicationanalysisandtherealizationoftheprac ticaltargetinGIS .Thequal…  相似文献   

7.
APPROXIMATE REPRESENTATION OF THE p-NORM DISTRIBUTION   总被引:1,自引:0,他引:1  
1 IntroductionInsurveyingdataprocessing ,itisoftensupposedthatobservationalerrorsdistributenormally .Ifob servationscomefromthenormaldistributionalclass ,themethodofleastsquarescangivethemini_ProjectsupportedbytheSustentationPlanforOutstandingTeachersofA…  相似文献   

8.
《地图》1994,(1)
英语之角(7)ScaleandGeneralizationScaleistheratioofdistanceonthemaptothecorrespondingdistanceontheground.Itcanbeshoxvnonamap:1)ast...  相似文献   

9.
1 IntroductionSpatialrelationsqueryisoneofbasicfunctionsinGIS’sapplication .MostofcurrentcommercialGISscanonlyqueryspatialrelationsforspatialob jectswithoutanyerrororuncertainty ,forexample ,tousecomputation geometryalgorithmtodeter minewhetherapointfalls…  相似文献   

10.
1 IntroductionTheNationalBureauofSurveyingandMappingofChina ,asthegovernmentaldepartmentinchargeoftheacquisitionandmanagementofgeodeticandcartographicdataonthewholenationalterritory ,aimedatthedevelopmentofGISandproposedso_called“4Dproductsstrategy”beyo…  相似文献   

11.
利用高级语言+OCX数字制图控件开发中小型GIS软件   总被引:3,自引:0,他引:3  
本语文交接停顿同用于数字地图应用软件开发的嵌入式OCX控件MapObjects与微软公司(MicroSoft)的高级语言Visual Rasic相结合,来开发满足各种不同用户需求的中小型GIS软件,作者在南京市分层分户图形编辑与管理系统的开发中应用此方法,并获得成功。  相似文献   

12.
1 IntroductionNeedlesstosay ,itisveryimportantformostGISuserstoacquireandintegratethegeospatialinfor mationfromvariousdistricts.However ,thecurrentsituationofgeospatialinformationproductionanddisseminationintheworldisstillunsatisfactory .Ononehand ,usersd…  相似文献   

13.
Development of a hybrid model for three-dimensional GIS   总被引:10,自引:0,他引:10  
1 IntroductionThree_dimensional (3_D)GeographicalInforma tionSystems (GISs)areveryimportantfortheap plicationfieldssuchasurbanplanningandmanage ment ,geologicalsubsurfacemodeling ,miningandoilexploration .Ina 3_DGIS ,anobjectcanbede scribedinhorizontal (x ,y)andv…  相似文献   

14.
GIS-ILA:THE GIS FOR ITALIAN LOGISTICS IN ANTARCTICA   总被引:2,自引:0,他引:2  
1 IntroductionTheGISfortheItalianLogisticsinAntarctica(GIS_ILA)collectsthedatainvolvedwiththeItal ianscientificexpeditionsinAntarctica ,obtainedfromtheyearlyExpeditionReports.Allthematicinformationavailableuptonowhavebeeninsertedintothedatabase ,fromthef…  相似文献   

15.
1 IntroductionTheWorkingGrouponGeodesyandGeographicInformation (WG_GGI)oftheScientificCommit teeonAntarcticResearch (SCAR )launchedtheprojectKingGeorgeIslandGIS (KGIS) .Inordertoprovideanoperationalsystem ,adatamodel,dataaccuracystandardsandadatainventoryhav…  相似文献   

16.
1 DataacquisitionandmanagementFrom 1 996to 2 0 0 0 ,theStateBureauofSurvey ingandMapping (SBSM )ofChinafocusedontwomainaspects :establishingChina’snationalspatialdatainfrastructure (CNSDI)and providingbasicinformationproductionforhazardpreventionandreduction .Thepr…  相似文献   

17.
1 IntroductionAgeographicinformationsystem (GIS)isusedtocollect,display ,analyseandmanagegeographicallyrelatedinformation .Itisanimportanttooltointe gratespatialdataacquiredatdifferentscales,timesandformats.GISisameansof1 )exchanginginformationbetweencountr…  相似文献   

18.
1 .GeomaticsandInformationScienceofWuhanUniversity(Bimonthly) ,anacademicperiodicaloriginatedfromJournalofWuhanTechnicalUniversityofSurveyingandMapping ,aimsatextendingin ternationalacademicexchangesofadvancedresearchresultsinsurveyingandmapping .Itcoverst…  相似文献   

19.
1 .GeomaticsandInformationScienceofWuhanUniversity(Bimonthly) ,anacademicperiodicaloriginatedfromJournalofWuhanTechnicalUniversityofSurveyingandMapping ,aimsatextendingin ternationalacademicexchangesofadvancedresearchresultsinsurveyingandmapping .Itcoverst…  相似文献   

20.
1 IntroductionThegreatKwan_yinStatuewithaheightof 61 .9minXiqiaoMountain,Nanhai,Guangdong provinceisthehighestsittingstatueintheworld .SeenfromFig .1 ,thestatuesurfaceisforgedwith 3mm_thickcoppersheets.Thestatueissupportedwithpreciseandrationalsteelstructurefr…  相似文献   

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