com.esri.arcgis.spatialanalyst
Class RasterDensityOp

java.lang.Object
  com.esri.arcgis.spatialanalyst.RasterDensityOp

All Implemented Interfaces:

IGeoAnalysisEnvironment, IRasterAnalysisEnvironment, com.esri.arcgis.interop.RemoteObjRef, IDensityOp, ISupportErrorInfo, Serializable

public class RasterDensityOp
extends Object
implements com.esri.arcgis.interop.RemoteObjRef, IRasterAnalysisEnvironment, IDensityOp, ISupportErrorInfo

A mechanism for performing density operations on rasters.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Spatial Analyst Extension.

Supported Platforms

Windows, Solaris, Linux

See Also:

Serialized Form

Constructor Summary

RasterDensityOp()
Constructs a RasterDensityOp using ArcGIS Engine.

RasterDensityOp(Object obj)
Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
RasterDensityOp theRasterDensityOp = (RasterDensityOp) obj;

Method Summary

boolean	equals(Object o) Compare this object with another
void	getCellSize(int[] envType, double[] cellSize) Gets the type and value of cell size in the RasterAnalysis.
static String	getClsid() getClsid.
String	getDefaultOutputRasterPrefix() The default output raster prefix.
String	getDefaultOutputVectorPrefix() The default output vector prefix.
void	getExtent(int[] envType, IEnvelope[] extent) Gets the type and values of extent in the RasterAnalysis.
IGeoDataset	getMask() Mask allows processing to occur only for a selected set of cells.
ISpatialReference	getOutSpatialReference() The output spatial reference of GeoAnalysis.
IWorkspace	getOutWorkspace() The output workspace of GeoAnalysis.
int	getVerifyType() The verify type of the RasterAnalysis.
int	hashCode() the hashcode for this object
void	interfaceSupportsErrorInfo(GUID riid) interfaceSupportsErrorInfo
IGeoDataset	kernelDensity(IGeoDataset sourceFeatures, Object radiusDistance, Object scaleFactor) Calculates the kernel density of points or lines in a radius around each output cell.
IGeoDataset	lineDensity(IGeoDataset lineFeatures, Object radiusDistance, Object scaleFactor) Calculates the simple density of lines in a radius around each output cell.
IGeoDataset	pointDensity(IGeoDataset pointFeatures, IRasterNeighborhood nbrhood, Object scaleFactor) Calculates the simple density of points in a neighborhood around each output cell.
void	reset() Remove all previously stored default rasteranalysis environments.
void	restoreToPreviousDefaultEnvironment() Restores to the previous default raster analysis environment.
void	setAsNewDefaultEnvironment() Sets the raster analysis environment of the object as new default environment.
void	setCellSize(int envType, Object cellSizeProvider) Sets the type and value of cell size in the RasterAnalysis.
void	setDefaultOutputRasterPrefix(String rasterPrefix) The default output raster prefix.
void	setDefaultOutputVectorPrefix(String vectorPrefix) The default output vector prefix.
void	setExtent(int envType, Object extentProvider, Object snapRasterData) Sets the type and values of extent in the RasterAnalysis.
void	setMaskByRef(IGeoDataset mask) Mask allows processing to occur only for a selected set of cells.
void	setOutSpatialReferenceByRef(ISpatialReference spatialReference) The output spatial reference of GeoAnalysis.
void	setOutWorkspaceByRef(IWorkspace workspace) The output workspace of GeoAnalysis.
void	setVerifyType(int verifyType) The verify type of the RasterAnalysis.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.esri.arcgis.interop.RemoteObjRef

getJintegraDispatch, release

Constructor Detail

RasterDensityOp

public RasterDensityOp()
                throws IOException,
                       UnknownHostException

Constructs a RasterDensityOp using ArcGIS Engine.

Throws:

IOException - if there are interop problems

UnknownHostException - if there are interop problems

RasterDensityOp

public RasterDensityOp(Object obj)
                throws IOException

Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
RasterDensityOp theRasterDensityOp = (RasterDensityOp) obj;

Construct a RasterDensityOp using a reference to such an object returned from ArcGIS Engine or Server. This is semantically equivalent to casting obj to RasterDensityOp.

Parameters:

obj - an object returned from ArcGIS Engine or Server

Throws:

IOException - if there are interop problems

Method Detail

getClsid

public static String getClsid()

getClsid.

equals

public boolean equals(Object o)

Compare this object with another

Overrides:

equals in class Object

hashCode

public int hashCode()

the hashcode for this object

Overrides:

hashCode in class Object

setCellSize

public void setCellSize(int envType,
                        Object cellSizeProvider)
                 throws IOException,
                        AutomationException

Sets the type and value of cell size in the RasterAnalysis.

Remarks

envType

An enumeration type specifying the raster cellsize environment settings for analysis. All subsequent results will be to the value specified. It can be of type esriRasterEnvMaxOf – The largest cell size of all input raster datasets that are specifed in the function. This is the default. This option is not suitable for methods such as IInterpolationOp::IDW, IDensityOp:KernalDensity etc. where features are the only inputs. Use esriRasterEnvValue instead. esriRasterEnvMinOf - Smallest cell size of all input raster datasets. This option is not suitable for methods such as IInterpolationOp::IDW, IDensityOp:KernalDensity etc. where features are the only inputs. Use esriRasterEnvValue instead esriRasterEnvValue - Any user specified value for the cell size. Use this option to specify a particular value for a cell size or for methods such as IInterpolationOp::IDW, IDensityOp:KernalDensity etc. where features are the only input.

[cellSizeProvider]

A specified value (double) or RasterDataset that is used to provide the cellsize environment value.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setCellSize in interface IRasterAnalysisEnvironment

Parameters:

envType - A com.esri.arcgis.geoanalyst.esriRasterEnvSettingEnum constant (in)

cellSizeProvider - A Variant (in, optional, pass null if not required)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCellSize

public void getCellSize(int[] envType,
                        double[] cellSize)
                 throws IOException,
                        AutomationException

Gets the type and value of cell size in the RasterAnalysis.

Remarks

envType	will return an enumeration type constant specifying the raster cellsize environment settings for analysis. It can be of type esriRasterEnvMaxOf - largest cell size of all input datasets. This is the default. esriRasterEnvMinOf - smallest cell size of all input datasets esriRasterEnvValue - User specified value.
cellsize	returns a value that specifying the current environment setting for cellsize

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getCellSize in interface IRasterAnalysisEnvironment

Parameters:

envType - A com.esri.arcgis.geoanalyst.esriRasterEnvSettingEnum constant (out: use single element array)

cellSize - The cellSize (out: use single element array)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setExtent

public void setExtent(int envType,
                      Object extentProvider,
                      Object snapRasterData)
               throws IOException,
                      AutomationException

Sets the type and values of extent in the RasterAnalysis.

Remarks

envType	An enumeration type specifying the raster extent environment settings for analysis. All subsequent results will be to this extent. It can be of type esriRasterEnvMinOf – Intersection of Inputs - All input feature extents are intersected and the extent common to all is used as the extent values for the study area. This is the default. esriRasterEnvMaxOf - Union of Inputs - All input feature extents are combined and the outer extent of the union is used. esriRasterEnvValue - Value - User specified values for the Left, Right, Top and Bottom extent (x, y values) of the study area.
[extentProvider]	An envelope object supporting IEnvelope interface or RasterDataset that is used to provide the environment values of the analysis extent.
[snapRasterData]	A RasterDataset that can be used to snap all output raster datasets to the cell registration of the specified raster. All subsequent results will share the lower-left corner and cell size of the specified raster.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setExtent in interface IRasterAnalysisEnvironment

Parameters:

envType - A com.esri.arcgis.geoanalyst.esriRasterEnvSettingEnum constant (in)

extentProvider - A Variant (in, optional, pass null if not required)

snapRasterData - A Variant (in, optional, pass null if not required)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getExtent

public void getExtent(int[] envType,
                      IEnvelope[] extent)
               throws IOException,
                      AutomationException

Gets the type and values of extent in the RasterAnalysis.

Remarks

envType

will return an enumeration constant specifying the raster extent environment settings for analysis. It can be of type, esriRasterEnvMinOf – Intersection of Inputs - All input feature extents are intersected and the extent common to all is used as the extent values for the study area. This is the default. esriRasterEnvMaxOf - Union of Inputs - All input feature extents are combined and the outer extent of the union is used. esriRasterEnvValue - Value - User specified values for the Left, Right, Top and Bottom extent (x, y values) of the study area.

extent

An envelope object supporting IEnvelope interface used to describe the values of the analysis extent.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getExtent in interface IRasterAnalysisEnvironment

Parameters:

envType - A com.esri.arcgis.geoanalyst.esriRasterEnvSettingEnum constant (out: use single element array)

extent - A reference to a com.esri.arcgis.geometry.IEnvelope (out: use single element array)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setMaskByRef

public void setMaskByRef(IGeoDataset mask)
                  throws IOException,
                         AutomationException

Mask allows processing to occur only for a selected set of cells.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setMaskByRef in interface IRasterAnalysisEnvironment

Parameters:

mask - A reference to a com.esri.arcgis.geodatabase.IGeoDataset (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getMask

public IGeoDataset getMask()
                    throws IOException,
                           AutomationException

Mask allows processing to occur only for a selected set of cells.

Remarks

The mask can be a reference to a Raster, RasterDataset, RasterBand, or RasterDescriptor object or FeatureClass, FeatureClassDescriptor object.

The mask identifies only those cells within the analysis extent that will be considered when performing an action. Only the identified cells will be processed in subsequent output raster datasets. All other cells are characterized as nodata.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getMask in interface IRasterAnalysisEnvironment

Returns:

A reference to a com.esri.arcgis.geodatabase.IGeoDataset

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setVerifyType

public void setVerifyType(int verifyType)
                   throws IOException,
                          AutomationException

The verify type of the RasterAnalysis.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setVerifyType in interface IRasterAnalysisEnvironment

Parameters:

verifyType - A com.esri.arcgis.geoanalyst.esriRasterVerifyEnum constant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getVerifyType

public int getVerifyType()
                  throws IOException,
                         AutomationException

The verify type of the RasterAnalysis.

Remarks

The value is an enumeration environment setting that contols the way that an output RasterDatasets are written to file when during analysis. The verify enumeration can be of type

esriRasterEnvVerifyOn - specifies that the user will be prompted to verify the output already exists and it is okay to overwrite it

esriRasterEnvVerifyOff - specifies that output data will be automatically overwritten if already exists. This is the default environment setting.

esriRasterEnvVerifyError - specifies that an error will be produced when the output already exists.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getVerifyType in interface IRasterAnalysisEnvironment

Returns:

A com.esri.arcgis.geoanalyst.esriRasterVerifyEnum constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getDefaultOutputRasterPrefix

public String getDefaultOutputRasterPrefix()
                                    throws IOException,
                                           AutomationException

The default output raster prefix.

Remarks

The user specified prefix which is included to all temporary output RasterDatasets during analysis.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getDefaultOutputRasterPrefix in interface IRasterAnalysisEnvironment

Returns:

The rasterPrefix

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setDefaultOutputRasterPrefix

public void setDefaultOutputRasterPrefix(String rasterPrefix)
                                  throws IOException,
                                         AutomationException

The default output raster prefix.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setDefaultOutputRasterPrefix in interface IRasterAnalysisEnvironment

Parameters:

rasterPrefix - The rasterPrefix (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getDefaultOutputVectorPrefix

public String getDefaultOutputVectorPrefix()
                                    throws IOException,
                                           AutomationException

The default output vector prefix.

Remarks

The user specified prefix which is included to all temporary output Shapefiles during analysis.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getDefaultOutputVectorPrefix in interface IRasterAnalysisEnvironment

Returns:

The vectorPrefix

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setDefaultOutputVectorPrefix

public void setDefaultOutputVectorPrefix(String vectorPrefix)
                                  throws IOException,
                                         AutomationException

The default output vector prefix.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setDefaultOutputVectorPrefix in interface IRasterAnalysisEnvironment

Parameters:

vectorPrefix - The vectorPrefix (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setAsNewDefaultEnvironment

public void setAsNewDefaultEnvironment()
                                throws IOException,
                                       AutomationException

Sets the raster analysis environment of the object as new default environment.

Remarks

Will set all current environment settings of the RasterAnalysis object as the new default environment. All subsequent analysis will use the set object properties unless otherwise specified.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setAsNewDefaultEnvironment in interface IRasterAnalysisEnvironment

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

restoreToPreviousDefaultEnvironment

public void restoreToPreviousDefaultEnvironment()
                                         throws IOException,
                                                AutomationException

Restores to the previous default raster analysis environment.

Remarks

This will restore the default environment to the settings of the "previous" RasterAnalysisEnvironment object used to set the default environement. Note: If multiple default environments have been set it will reference the past settings one at a time in order of sequence.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

restoreToPreviousDefaultEnvironment in interface IRasterAnalysisEnvironment

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

reset

public void reset()
           throws IOException,
                  AutomationException

Remove all previously stored default rasteranalysis environments.

Remarks

This method can be used to restore the system default raster environment settings for extent, cell size, precision, spatial reference and/or current workspace for analysis. This will change all previously altered environment settings made to the RasterAnlaysis object back to the original settings.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

reset in interface IRasterAnalysisEnvironment

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setOutWorkspaceByRef

public void setOutWorkspaceByRef(IWorkspace workspace)
                          throws IOException,
                                 AutomationException

The output workspace of GeoAnalysis.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setOutWorkspaceByRef in interface IGeoAnalysisEnvironment

Parameters:

workspace - A reference to a com.esri.arcgis.geodatabase.IWorkspace (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getOutWorkspace

public IWorkspace getOutWorkspace()
                           throws IOException,
                                  AutomationException

The output workspace of GeoAnalysis.

Remarks

The variable is an object specifying the directory or subdirectory to contain the output rasterdataset

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getOutWorkspace in interface IGeoAnalysisEnvironment

Returns:

A reference to a com.esri.arcgis.geodatabase.IWorkspace

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setOutSpatialReferenceByRef

public void setOutSpatialReferenceByRef(ISpatialReference spatialReference)
                                 throws IOException,
                                        AutomationException

The output spatial reference of GeoAnalysis.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setOutSpatialReferenceByRef in interface IGeoAnalysisEnvironment

Parameters:

spatialReference - A reference to a com.esri.arcgis.geometry.ISpatialReference (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getOutSpatialReference

public ISpatialReference getOutSpatialReference()
                                         throws IOException,
                                                AutomationException

The output spatial reference of GeoAnalysis.

Remarks

The variable references an object that specifies the output features spatial reference. If not explicitly set the spatial reference of the input features will be used.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getOutSpatialReference in interface IGeoAnalysisEnvironment

Returns:

A reference to a com.esri.arcgis.geometry.ISpatialReference

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

pointDensity

public IGeoDataset pointDensity(IGeoDataset pointFeatures,
                                IRasterNeighborhood nbrhood,
                                Object scaleFactor)
                         throws IOException,
                                AutomationException

Calculates the simple density of points in a neighborhood around each output cell. Density is measured as number of points per unit area.

Remarks

sourceFeatures	Input point or polyline featureclass, featureclass descriptor or featureDataset used to calculates the density of features around each output cell. For density functions, SPOT is the default field used when no field has been specified. If a SPOT field does not exist, then no field will be used, and each feature will be counted only once in the calculation. This is similar to specifying a keyword for the field of "NONE". If a field other than NONE is used, the field's value (the item value) determines the number of times to count the point. To specify the field you want form your dataset, use the FeatureClassDescriptor object.
nbrhood	An IRasterNeighborhood defining the configuration of the neighborhoods within which the point desnity will be calculated. IDensityOp:PointDensity supports any supports any neighborhood supported by IRasterNeighborhood. They include a rectangle, circle, annulus, wedge, and an irregular shaped neighborhood. The neighborhood will be defined by the minimum-bounding rectangle of the specified neighborhood. The minimum-bounding rectangle will include more cells then the specified neighborhood in certain cases such as with a circle, annulus, and wedge. The neighborhoods types are: SetAnnulus (innerRadius As Double, outerRadius As Double, unitsType as esriGeoAnalysisUnitsEnum) SetCircle (radius As Double, unitsType as esriGeoAnalysisUnitsEnum) SetDefault () SetIrregular (height As Long, width As Long, entryValues)
[scaleFactor]	Used to convert the map units of the input dataset to different units. The default value is 1, which calculates density in units of number of points per one square map unit. Effectively, output raster values are multiplied by the square of this factor.

• The method returns a reference to a Raster object.
• Read the Working with ArcGIS Spatial Analyst objects technical document for general information on implementing Spatial Analyst operations.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Spatial Analyst Extension.

Supported Platforms

Windows, Solaris, Linux

Specified by:

pointDensity in interface IDensityOp

Parameters:

pointFeatures - A reference to a com.esri.arcgis.geodatabase.IGeoDataset (in)

nbrhood - A reference to a com.esri.arcgis.geoanalyst.IRasterNeighborhood (in)

scaleFactor - A Variant (in, optional, pass null if not required)

Returns:

A reference to a com.esri.arcgis.geodatabase.IGeoDataset

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

lineDensity

public IGeoDataset lineDensity(IGeoDataset lineFeatures,
                               Object radiusDistance,
                               Object scaleFactor)
                        throws IOException,
                               AutomationException

Calculates the simple density of lines in a radius around each output cell. Density is measured as length of lines per unit area.

Remarks

lineFeatures	Input polyline featureclass, featureclass descriptor or featureDataset used to calculate the density of lines features around each output cell. For density functions, SPOT is the default field used when no field has been specified. If a SPOT field does not exist, then no field will be used, and each feature will be counted only once in the calculation. This is similar to specifying a keyword for the field of "NONE". If a field other than NONE is used, the length of the line is considered to be its actual length times the value of the field for that line. To specify the field use the FeatureClassDescriptor object.
[radiusDistance]	A circular neighborhood with the given radius. The default radius is calculated so that all cells in the output grid have at least one point within the neighborhood.
[scaleFactor]	Used to convert the map units of the input dataset to different units. The default value is 1, which calculates density in units of number of points per one square map unit. Effectively, output raster values are multiplied by the square of this factor.

• The method returns a reference to a Raster object.
• Read the Working with ArcGIS Spatial Analyst objects technical document for general information on implementing Spatial Analyst operations.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Spatial Analyst Extension.

Supported Platforms

Windows, Solaris, Linux

Specified by:

lineDensity in interface IDensityOp

Parameters:

lineFeatures - A reference to a com.esri.arcgis.geodatabase.IGeoDataset (in)

radiusDistance - A Variant (in, optional, pass null if not required)

scaleFactor - A Variant (in, optional, pass null if not required)

Returns:

A reference to a com.esri.arcgis.geodatabase.IGeoDataset

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

kernelDensity

public IGeoDataset kernelDensity(IGeoDataset sourceFeatures,
                                 Object radiusDistance,
                                 Object scaleFactor)
                          throws IOException,
                                 AutomationException

Calculates the kernel density of points or lines in a radius around each output cell. A kernel function is used to distribute density values around each point or line.

Remarks

pointFeatures	Input point featureclass, featureclass descriptor or featureDataset used to calculate the density of point features around each output cell. For density functions, SPOT is the default field used when no field has been specified. If a SPOT field does not exist, then no field will be used, and each feature will be counted only once in the calculation. This is similar to specifying a keyword for the field of "NONE". If a field other than NONE is used, the field's value (the item value) determines the number of times to count the point. To specify the field use the FeatureClassDescriptor object.
[radiusDistance]	A circular neighborhood with the given radius. The default radius is calculated so that all cells in the output grid have at least one point within the neighborhood.
[scaleFactor]	Used to convert the map units of the input dataset to different units. The default value is 1, which calculates density in units of number of points per one square map unit. Effectively, output raster values are multiplied by the square of this factor.

• The method returns a reference to a Raster object.
• Read the Working with ArcGIS Spatial Analyst objects technical document for general information on implementing Spatial Analyst operations.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server. Requires Spatial Analyst Extension.

Supported Platforms

Windows, Solaris, Linux

Specified by:

kernelDensity in interface IDensityOp

Parameters:

sourceFeatures - A reference to a com.esri.arcgis.geodatabase.IGeoDataset (in)

radiusDistance - A Variant (in, optional, pass null if not required)

scaleFactor - A Variant (in, optional, pass null if not required)

Returns:

A reference to a com.esri.arcgis.geodatabase.IGeoDataset

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

interfaceSupportsErrorInfo

public void interfaceSupportsErrorInfo(GUID riid)
                                throws IOException,
                                       AutomationException

interfaceSupportsErrorInfo

Description

Indicates whether the interface supports IErrorInfo.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

interfaceSupportsErrorInfo in interface ISupportErrorInfo

Parameters:

riid - A Structure: com.esri.arcgis.support.ms.stdole.GUID (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.