ILayer

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ILayer 接口是被图层（Layer）对象实现的，图层对象是用来在地图中显示空间信息，注意，

图层不含有空间数据，它只是获取数据的一个引用层而已。图层对象是一个抽象对象，它定

义了所有图层的公共方法和属性，它拥有很多子类，如IFeatureLayer，IGeoFeatureLayer，

ICadFeatureLayer，IRasterLayer。图层相当于要素的载体，当用ArcMap将要素类打开后就成为了图层。

属性成员：

Properties属性成员	Description说明
AreaOfInterest	The default area of interest for the layer.感兴趣区域
Cached	Indicates if the layer needs its own display cache.需要高速缓存
Draw	Draws the layer to the specified display for the given draw phase .画出指定显示层
MaximumScale	Maximum scale (representative fraction) at which the layer will display.在该图层显示的做大规模
MinimumScale	Minimum scale (representative fraction) at which the layer will display..在该图层显示的最小规模
Name	Layer name.命名
ShowTips	Indicates if the layer shows map tips.如果图层显示地图提示，指示
SpatialReference	Spatial reference for the layer .层空间的引用
SupportedDrawPhases	Supported draw phases.支持绘制状态
TipText	Map tip text at the specified location .在指定位置的地图提示文本
Valid	Indicates if the layer is currently valid. 层是当前有效
Visible	Indicates if the layer is currently visible.曾是当前可见
方法			描述
Draw			画出层
Classes		Description
BasemapLayer		Layer containing a Basemap.
CadAnnotationLayer		An ESRI Cad annotation layer.
CadastralFabricLayer		Cadastral Fabric Layer Object.
CadastralFabricSubLayer		Cadastral Fabric Feature Layer Object.
CadFeatureLayer		ESRI CAD Feature Layer class.
CadLayer		ESRI CAD Layer class.
CompositeGraphicsLayer		A collection of graphics layers that behave like single layer.
CoverageAnnotationLayer		An ESRI coverage annotation layer.
DimensionLayer		A collection of properties for a dimension layer.
DummyGraduatedMarkerLayer		A dummy layer used to display legend items in the style gallery (Singleton).
DummyLayer		A dummy layer used to display legend items in the style gallery (Singleton).
FDOGraphicsLayer		A collection of properties for an annotation layer (feature data object graphics layer).
FDOGraphicsSublayer		A collection of properties for an annotation sublayer layer (feature data object graphics sublayer).
FeatureLayer		A collection of features and their visual representation.
ForceElementLayer (esriDefenseSolutions)		A custom layer, bound to a feature layer, that wraps a force element display list and makes it possible to view and manipulate its cached graphic contents in an ArcGIS map display.
GdbRasterCatalogLayer		Geodabase RasterCatalog source and display options.
GeoVideoLayer (esriGlobeCore)		The georeferenced video layer.
GlobeGraphicsLayer (esriGlobeCore)		The Globe Graphics Layer.
GlobeLayer (esriGlobeCore)		The cache-only globe layer.
GlobeServerLayer (esriGlobeCore)		Provides programmatic access to a globe server layer.
GraphicsLayer3D (esri3DAnalyst)		A 3D Graphics Layer.
GraphicsSubLayer		Graphic sublayer handed back by the composite graphics layer.
GroupLayer		A collection of layers that behaves like a single layer.
ImageServerLayer		Image server layer source and display options.
IMSMapLayer		A container for the display and manipulation of IMS layers.
IMSSubFeatureLayer		A collection of IMS features as a sublayer of an IMSMapLayer.
IMSSubLayer		An IMS Layer as a sublayer of an IMSMapLayer.
JoinedControlPointLayer (esriCadastralUI)		Layer object that represents Control Points.
JoinedLinePointLayer (esriCadastralUI)		Layer object that represents Joined LinePoints.
JoinedParcelLayer (esriCadastralUI)		Layer object that represents Joined Parcels.
JoinedParcelLineLayer (esriCadastralUI)		Layer object that represents Joined Parcel Lines.
JoinedPointLayer (esriCadastralUI)		Layer object that represents Joined Points.
KmlLayer (esriGlobeCore)		ESRI KML Layer class.
MADtedLayer (esriDefenseSolutions)		A layer used to control the display of MA DTED Catalogs.
MapServerBasicSublayer		Provides programmatic access to a basic map server sublayer.
MapServerFindSublayer		Provides programmatic access to a map server sublayer with Find capability.
MapServerIdentifySublayer		Provides programmatic access to a map server sublayer with Identify capability.
MapServerLayer		Provides programmatic access to a map server layer.
MapServerQuerySublayer		Provides programmatic access to a map server sublayer with Find and Identify capability.
MARasterLayer (esriDefenseSolutions)		A layer used to control the display of MA RPF Catalogs.
NALayer (esriNetworkAnalyst)		The layer for defining, solving, and viewing network analysis results.
NetworkLayer		ESRI Network Layer CoClass.
NITFGraphicsLayer		A NITF graphics layer containing NITF CGM graphics.
PacketJoinedLayer (esriCadastralUI)		Layer object that represents a packet of Joined Parcels, Lines, Points, Control Points, LinePoints and Text.
ProcessLayer (esriGeoprocessing)		A collection of process layers that behaves like a single layer.
RasterBasemapLayer		Basemap Layer containing a Raster.
RasterCatalogLayer		Raster catalog source and display options.
RasterLayer		Raster layer source and display options.
SchematicLayer (esriSchematic)		A Schematic layer object.
SearchResultsLayer (esriCatalog)		A layer that lets you preview a search result in the Geography tab.
TacticalGraphicLayer (esriDefenseSolutions)		A custom layer, bound to a feature layer, that wraps a tactical graphic display list and makes it possible to view and manipulate its cached graphic contents in an ArcGIS map display.
TemporalFeatureLayer (esriTrackingAnalyst)		Defines the coclass IDL parameters and attributes of the TemporalFeatureLayer COM object.
TerrainLayer		The Terrain Layer class.
TinLayer		The TIN Layer class.
TopologyLayer		A collection of properties for a topology layer.
WCSLayer		WCS layer source and display options.
WMSGroupLayer		A container for the display of WMS group layers.
WMSLayer		A container for the display of WMS sub layers.
WMSMapLayer		A container for the display and manipulation of WMS layers