ArcGIS Developer Help

IImageServerLayer Interface

Provides access to members that control an image server layer.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

This interface is new at ArcGIS 9.3.

Members

	Name	Description
	AreaOfInterest	The default area of interest for the layer.
	Cached	Indicates if the layer needs its own display cache.
	Compression	The transmission compression.
	CompressionQuality	The transmission compression quality.
	DataFrameExtent	The extent of the dataframe that contains the layer.
	DataSource	Layer�s data source object.
	Draw	Draws the layer to the specified display for the given draw phase.
	Initialize	Initializes the layer with an image service URL.
	MaximumScale	Maximum scale (representative fraction) at which the layer will display.
	MinimumScale	Minimum scale (representative fraction) at which the layer will display.
	Name	Layer name.
	Raster	The assoicated raster.
	Renderer	The assoicated raster renderer.
	ServiceInfo	The image service info.
	ServiceURL	The layer�s service URL.
	ShowResolution	Indicates if the image resolution should be displayed in TOC.
	ShowTips	Indicates if the layer shows map tips.
	SpatialReference	Spatial reference for the layer.
	SupportedDrawPhases	Supported draw phases.
	TipText	Map tip text at the specified location.
	Valid	Indicates if the layer is currently valid.
	Visible	Indicates if the layer is currently visible.
	VisibleExtent	The Visible extent of the layer in the data frame.

Inherited Interfaces

Interfaces	Description
ILayer	Provides access to members that work with all layers.

Classes that implement IImageServerLayer

Classes	Description
ImageServerLayer	Image server layer source and display options.

Remarks

IImageServerLayer interface allows you to access properties of an ImageServerLayer created from an ImageServer. The properties include compression type and quality, serviceinfo, service URL, and so on. An ImageServerLayer is similar to a RasterLayer; you can change how the pixels render on the display by changing the renderer applied to the layer.

ImageServerLayer needs to be initialized using the Initialize method before use.

[C#]

This example shows how to create an image server layer from a URL, clip a portion of image and save it to a file.

public static void AccessImageServerLayer()
{
//create an image server layer by passing an URL
IImageServerLayer2 imageserverlayer = new ImageServerLayerClass();
string URL = "http://myserver/arcgis/services/amazon/imageserver";
imageserverlayer.Initialize(URL);

//get raster from the image server layer
IRaster raster = imageserverlayer.Raster;

//raster from image server is normally large, you need to
//define the size of the raster
IRasterProps rasterProps = (IRasterProps)raster;
IEnvelope clipEnvelope = new EnvelopeClass();
clipEnvelope.PutCoords(779000, 9628000, 786000, 9634000);
rasterProps.Extent = clipEnvelope;
rasterProps.Width = 256;
rasterProps.Height = 256;

//save the clipped raster to File Geodatabase
ISaveAs saveas = (ISaveAs)raster;
IWorkspaceFactory workspaceFact = new FileGDBWorkspaceFactoryClass();
IWorkspace workspace = workspaceFact.OpenFromFile("c:\temp\fgdb.gdb",0);
saveas.SaveAs("clipfromimageserverlayer", workspace, "gdb");
}

[Visual Basic .NET]

This example shows how to create an image server layer from a URL, clip a portion of image and save it to a file.

Public Shared Sub AccessImageServerLayer()
'create an image server layer by passing an URL
Dim imageserverlayer As IImageServerLayer2 = New ImageServerLayerClass()
Dim URL As String = "http://myserver/arcgis/services/amazon/imageserver"
imageserverlayer.Initialize(URL)

'get raster from the image server layer
Dim raster As IRaster = imageserverlayer.Raster

'raster from image server is normally large, you need to
'define the size of the raster
Dim rasterProps As IRasterProps = CType(raster, IRasterProps)
Dim clipEnvelope As IEnvelope = New EnvelopeClass()
clipEnvelope.PutCoords(779000, 9628000, 786000, 9634000)
rasterProps.Extent = clipEnvelope
rasterProps.Width = 256
rasterProps.Height = 256

'save the clipped raster to File Geodatabase
Dim saveas As ISaveAs = CType(raster, ISaveAs)
Dim workspaceFact As IWorkspaceFactory = New FileGDBWorkspaceFactoryClass()
Dim workspace As IWorkspace = workspaceFact.OpenFromFile("c:" & Constants.vbTab & "emp" & Constants.vbFormFeed & "gdb.gdb",0)
saveas.SaveAs("clipfromimageserverlayer", workspace, "gdb")
End Sub