RasterFunctionTemplate

Base Type: RasterFunction

A class for a template raster function.

Property	Type	Description
Arguments	RasterFunctionArguments	The raster function arguments in the template.
Function	RasterFunction	The raster function in the template.
Name	string	The name.
PixelType	rstPixelType	The pixel type.

Remarks

The raster function template can be used to chain multiple functions.

Examples

C#

//general setting

sampleImage_ImageServer imageSrv = new sampleImage_ImageServer();

imageSrv.Url = url;

sampleImage.GeoImageDescription geoImgDesc = new SOAPRasterFunctionTemplate.sampleImage.GeoImageDescription();

geoImgDesc.Height = 600;

geoImgDesc.Width = 800;

geoImgDesc.Interpolation = SOAPRasterFunctionTemplate.sampleImage.rstResamplingTypes.RSP_BilinearInterpolation;

ImageServiceInfo isInfo = imageSrv.GetServiceInfo();

geoImgDesc.Extent = isInfo.Extent;



//raster function variable

RasterFunctionVariable rfv = new RasterFunctionVariable();

rfv.Name = "ClipRaster1";

rfv.IsDataset = true;

rfv.IsDatasetSpecified = true;



//clip 1               

ClipFunction clipFunction1 = new ClipFunction();

ClipFunctionArguments clipArgument1 = new ClipFunctionArguments();

EnvelopeN clipEnvelope1 = new EnvelopeN();

double xmin, xmax, ymin, ymax;

xmin = ((EnvelopeN)isInfo.Extent).XMin;

xmax = ((EnvelopeN)isInfo.Extent).XMax;

ymin = ((EnvelopeN)isInfo.Extent).YMin;

ymax = ((EnvelopeN)isInfo.Extent).YMax;

clipEnvelope1.XMin = xmin + (xmax - xmin) / 5;

clipEnvelope1.XMax = xmin + (xmax - xmin) * 4 / 5;

clipEnvelope1.YMin = ymin + (ymax - ymin) / 5;

clipEnvelope1.YMax = ymin + (ymax - ymin) * 4 / 5;

clipEnvelope1.SpatialReference = ((EnvelopeN)isInfo.Extent).SpatialReference;

clipArgument1.Names = new string[] { "ClippingGeometry", "ClippingType", "Raster" };

clipArgument1.Values = new object[] { clipEnvelope1, 1, rfv };



RasterFunctionTemplate rftClip1 = new RasterFunctionTemplate();

rftClip1.Name = "ExtractTemplate";

rftClip1.Function = clipFunction1;

rftClip1.Arguments = clipArgument1;



//clip 2

ClipFunction clipFunction = new ClipFunction();

ClipFunctionArguments clipArgument = new ClipFunctionArguments();

EnvelopeN clipEnvelope = new EnvelopeN();

//double xmin, xmax, ymin, ymax;

xmin = ((EnvelopeN)isInfo.Extent).XMin;

xmax = ((EnvelopeN)isInfo.Extent).XMax;

ymin = ((EnvelopeN)isInfo.Extent).YMin;

ymax = ((EnvelopeN)isInfo.Extent).YMax;



clipEnvelope.XMin = xmin;

clipEnvelope.XMax = (xmin + xmax) / 2;

clipEnvelope.YMin = ymin;

clipEnvelope.YMax = (ymin + ymax) / 2;

clipEnvelope.SpatialReference = ((EnvelopeN)isInfo.Extent).SpatialReference;



clipArgument.Names = new string[] { "ClippingGeometry", "ClippingType", "Raster" };//{ "ColorRamp", "Raster" };

clipArgument.Values = new object[] { clipEnvelope, 1, rftClip1 }; //1 inside, 2 outside



RasterFunctionTemplate rftClip = new RasterFunctionTemplate();

rftClip.Function = clipFunction;

rftClip.Arguments = clipArgument;

rftClip.Name = "RFTName";



//rendering rule

RenderingRule renderRule = new RenderingRule();

renderRule.Function = rftClip;

renderRule.VariableName = "ClipRaster1";



geoImgDesc.RenderingRule = renderRule;



ImageType imageType = new ImageType();

imageType.ImageFormat = esriImageFormat.esriImagePNG;

imageType.ImageReturnType = esriImageReturnType.esriImageReturnURL;

ImageResult imgResult = imageSrv.ExportImage(geoImgDesc, imageType);

This is a sample for using a predefined raster function template (rft.xml), as defined by the service publisher . The file structure will vary from service to service.

//define arguments (if necessary to overwrite default values)
RasterFunctionArguments argument = new RasterFunctionTemplateArguments();
argument.Names = new string[] { "Arg1", "Arg2" };
argument.Values = new object[] { "value1", "value2" };
RenderingRule renderRule = new RenderingRule();
renderRule.Arguments = argument;
renderRule.Name = "MyFunctionTemplateName";
renderRule.VariableName = "Raster";
geoImageDesc.RenderingRule = renderRule;