Provides access to members that control a collection of RasterBands.
Product Availability
When To Use
The IRasterBandCollection interface allows you to access the raster bands that compose the raster.
Members
| Description | ||
|---|---|---|
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Add | Adds a RasterBand to the band collection. |
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AppendBand | Appends a RasterBand to the band collection. |
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AppendBands | Appends a collection of RasterBands to the band collection. |
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BandByName | A RasterBand given its name. |
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BandIndex | The index of a RasterBand given its name. |
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Bands | All the bands in the collection as an interface to the RasterBands enumerator object. |
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Clear | Removes all the elements in the collection. |
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Count | The number of bands in the collection. |
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Item | Returns a RasterBand given its index. |
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Remove | Removes an element from the collection. |
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SaveAs | Creates a new persistent RasterDataset with the bands in the collection. |
CoClasses that implement IRasterBandCollection
| CoClasses and Classes | Description |
|---|---|
| FunctionRasterDataset | A class for a function raster dataset. |
| Raster | An in-memory representation of a dynamic raster that can perform resampling and reprojection. |
| RasterDataset | A representation of a raster dataset on disk. |
| RenderedRaster (esriCarto) | A raster that is rendered using a renderer. |
Remarks
IRasterBandCollection interface is used to manage and access a collection of raster bands of a RasterDataset or a Raster
The Add, Remove, Clear, AppendBand and AppenBands methods only applicable to IRasterBandCollection on a Raster, not on a RasterDataset.
When a band is added to or removed from a Raster object, the Raster recomputes a default cell size, extent, and spatial reference based on the bands in the Raster. If the user has not explicitly set these properties, the default settings will be applied to the raster object.
The spatial reference is determined first. If the user has not specified a spatial reference system to be applied to the raster, it is calculated from the first band in the raster that has a spatial reference other than unknown. If all bands have an unknown spatial reference, the spatial reference system of the raster will be unknown.
Next the cell size is calculated, if the cell size and number of rows and columns have not been specified by the user. The cell size is the maximum cell size of any input bands projected into the current spatial reference system. If no spatial reference system is known, the largest cell size of any band in the Raster is selected.
Finally, if the extent has not been specified by the user, it is calculated. The extent is the smallest bounding box with an integer number of rows and columns that can be placed around all bands of the input raster while aligning with the bottom-left corner of the Raster.