文档介绍：该【ArcGIS地理信息系统教程ppt课件 】是由【rsqcpza】上传分享，文档一共【122】页，该文档可以免费在线阅读，需要了解更多关于【ArcGIS地理信息系统教程ppt课件 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。Chapter1
GISData
Copyright ©McGraw-Hill Education. Permissionrequiredforreproductionordisplay.
1-1
Outline
GISConcepts
Representingtheworldasamap
Coordinatesystems
Modelingfeaturebehaviors
Mapscale
Dataqualityissues
AboutArcGIS
StoringdatainArcGIS
UsingArcMap
Layersandlayerproperties
Coordinatesystems
Copyright©
1-2
GISConcepts
Chapter1.
GISData
Copyright©
1-3
Representingtheworldasamap
Copyright©
1-4
Typesofmapinformation
Discreteobjects
Objectsthatexistinoneplaceandnotinanother
Canbepresentorabsent
Roads
Houses
States
Continuousdata
Aquantitythatexistsovertheentiremaparea
Alwayspresent;changesinvaluefromplacetoplace
Elevation
Temperature
Precipitation
Copyright©
1-5
Howmapsportraytheworld
Copyright©
1-6
Pointfeatures
Linefeatures
Polygonfeatures
Annotationfeatures
Generalization
Copyright©
1-7
Errors
NeighborhoodinPortsmouth,VA
CourtesyGoogleEarth/DigitalGlobe
USGSDigitalRasterGraphic
GeneralizationandScale
Scaleistheratioofsizeonthegroundtosizeonthemap
Scaleinfluencesthegeneralizationoffeatures
Copyright©
1-8
About1:24,000
About1:50,000,000
GeneralizationandScale
Copyright©
1-9
Polygonsatonescalemaybepointsorlinesatadifferentscale
Largescalemap
Intermediatescalemap
Smallscalemap
GISdatamodels
Copyright©
1-10
Vectormodel
Rastermodel