IZonalOp.ZonalStatisticsAsTable C#

MarilynGambone — Mon, 19 Dec 2011 14:55:59 GMT

Hi,

I'm trying to follow the ArcObject sample codes for calculating zonal statistics as table. I'm not getting an error but at the same time, there is no output. I notice the difference between this SpatialAnalyst ArcObject and the SpatialAnalystTool's ZonalStatisticsAsTable: The ArcObject version is missing the output table name. I don't know where to specify this in the ArcObject version. Here's a snippet of my code:

//Create a Feature Class Descriptor object for input shapefile zones
IFeatureClassDescriptor aoiDesc = new FeatureClassDescriptorClass();
string zoneField = "HydroID";
IFeatureClass aoiFc = OpenFeatureClassFromShapefiile(polygonPath, polygonName);
IGeoDataset aoiGds = (IGeoDataset)aoiFc;
aoiDesc.Create(aoiFc, null, zoneField);
aoiGds = (IGeoDataset)aoiDesc;

//Create a Raster Descriptor object for input raster values
IRaster ras = new RasterClass();
ras = OpenRasterDataset(exprasPath, exprasName).CreateDefaultRaster();
IRasterDescriptor rasDesc = new RasterDescriptorClass();
string rasValue = "VALUE";
rasDesc.Create(ras, null, rasValue);
IGeoDataset rasGds = (IGeoDataset)rasDesc;

//Create an instance of the output table object
ITable stats = null;

//Initialize an IZonalOp object
ESRI.ArcGIS.SpatialAnalyst.IZonalOp zoneOp = new ESRI.ArcGIS.SpatialAnalyst.RasterZonalOpClass();

//Perform spatial operation
stats = zoneOp.ZonalStatisticsAsTable(aoiGds, rasGds, true);

Appreciate any suggestion on how to get this to work.

Re: IZonalOp.ZonalStatisticsAsTable C#

curtvprice — Mon, 19 Dec 2011 22:08:49 GMT

Have you considered using the geoprocessor? In general it is a lot less painful to create a geoprocessor object and throw the tool at it.

Re: IZonalOp.ZonalStatisticsAsTable C#

MarilynGambone — Tue, 20 Dec 2011 11:46:03 GMT

Hi,

Yes. That's what I ended up doing. Just wondering if the ESRI guys know there's something wrong with this ArcObject function.

Thanks...

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IZonalOp.ZonalStatisticsAsTable C#

Re: IZonalOp.ZonalStatisticsAsTable C#

Re: IZonalOp.ZonalStatisticsAsTable C#