fmeobjects.FMEBand

`FMEBand.appendPalette`(palette)	Appends `FMEPalette` to the band.
`FMEBand.enableBandCache`(enableCache)	Enables/disables caching for this band.
`FMEBand.equals`(band)	Tells whether two bands are identical.
`FMEBand.flushCache`()	Removes any cached data and releases cache resources.
`FMEBand.getBandCacheID`()	Returns ID of the last band cache.
`FMEBand.getMaxValue`()	Returns maximum value of the band.
`FMEBand.getMinValue`()	Returns minimum value of the band.
`FMEBand.getNodataValue`()	Returns nodataValue of the band.
`FMEBand.getNumPalettes`()	Returns the number of palettes in a band.
`FMEBand.getPalette`(paletteIndex)	Returns a palette from the band based on its numbered order in the band.
`FMEBand.getProperties`()	Returns band properties of this band.
`FMEBand.getRasterProperties`()	Returns raster properties of the raster where this band is appended.
`FMEBand.getTile`(row, col, tile)	Populates a tile of data in the interpretation of the band starting at the values of row and col and encapsulating the number of columns defined in the tile.
`FMEBand.hasBeenModified`()	Returns whether the band has been modified from its baseline state.
`FMEBand.hasDataBeenModifiedSinceCache`()	Returns whether the band's data has been modified from its baseline state.
`FMEBand.hasKnownMaxValue`()	Tells whether the band knows its max value.
`FMEBand.hasKnownMinValue`()	Tells whether the band knows its min value.
`FMEBand.isSelected`()	Tells whether the band is selected for operations.
`FMEBand.removePalette`(paletteIndex)	Removes and returns a palette from the band.
`FMEBand.setCacheWindow`(startRow, numRows, ...)	Identifies the data that will be eligible for caching through `getTile()` call.
`FMEBand.setDeleteSourceOnDestroy`(deleteFlag)	Sets delete flag, identifying whether the band should delete its source data file when destroyed.
`FMEBand.setMaxValue`(tile)	Sets the max value of the band.
`FMEBand.setMinValue`(tile)	Sets the min value of the band.
`FMEBand.setModified`(modified)	Sets whether band has been modified from baseline state.
`FMEBand.setOutputSize`(rows, cols)	Changes the size of the source data.
`FMEBand.setRasterProperties`(rasterProperties)	Set the raster properties.
`FMEBand.setSelected`(selected)	Selects/ Deselects band for operations.
`FMEBand.swapPopulator`(populator)	Swaps the band's populator with the passed in populator.

class FMEBand

FME Band Class

Create an instance of a FMEBand object.

init(populator, rasterProperties, bandProperties, nodataValue)

Creates a Band instance using given arguments.

Parameters

populator (FMEBandTilePopulator) – BandTilePopulator object.
rasterProperties (FMERasterProperties) – RasterProperties object.
bandProperties (FMEBandProperties) – BandProperties object.
nodataValue (FMETile) – (Optional) The value that represents unknown or invalid data.

Return type

FMEBand

Returns

An instance of a FMEBand object.

init(band)

Create a copy of the passed in band object.

Parameters: band (FMEBand) – The band object to create a copy of.
Return type: FMEBand
Returns: An instance of a FMEBand object.

__init__(*args, **kwargs)

appendPalette(palette)

Appends FMEPalette to the band.

Parameters: palette (FMEPalette) – Palette to append.
Return type: None
Raises: FMEException – An exception is raised if an error occurred.

enableBandCache(enableCache)

Enables/disables caching for this band.

Parameters: enableCache (bool) – True to enable, False to disable.
Return type: None

equals(band)

Tells whether two bands are identical.

Return type: bool
Returns: True, if two bands are the same.

flushCache()

Removes any cached data and releases cache resources.

Return type: None

getBandCacheID()

Returns ID of the last band cache.

Return type: int
Returns: ID of the last band cache.

getMaxValue()

Returns maximum value of the band.

Return type: Concrete type of FMETile
Returns: Maximum value of the band.
Raises: FMEException – An exception is raised if an error occurred.

getMinValue()

Returns minimum value of the band.

Return type: Concrete type of FMETile
Returns: Minimum value of the band.
Raises: FMEException – An exception is raised if an error occurred.

getNodataValue()

Returns nodataValue of the band.

This value represents unknown or invalid data. Often the value is at one of the extremes of the data type range.

If the band does not have a nodata value, None will be returned.

Return type: Concrete type of FMETile or None
Returns: NodataValue of the band.
Raises: FMEException – An exception is raised if an error occurred.

getNumPalettes()

Returns the number of palettes in a band.

Return type: int
Returns: Number of palettes in a band.

getPalette(paletteIndex)

Returns a palette from the band based on its numbered order in the band.

Parameters: paletteIndex (int) – Index number of the palette.
Return type: FMEPalette
Returns: A palette from the band.
Raises: FMEException – An exception is raised if an error occurred.

getProperties()

Returns band properties of this band.

Return type: FMEBandProperties
Returns: Band Properties of this band.
Raises: FMEException – An exception is raised if an error occurred.

getRasterProperties()

Returns raster properties of the raster where this band is appended.

Return type: FMERasterProperties
Returns: Raster Properties of the raster.
Raises: FMEException – An exception is raised if an error occurred.

getTile(row, col, tile)

Populates a tile of data in the interpretation of the band starting at the values of row and col and encapsulating the number of columns defined in the tile.

Parameters

row (int) – Row number.
col (int) – Column number.
tile (FMETile) – Tile to populate.

Return type

Concrete class of FMETile type

Returns

Tile after populating a tile of data.

Raises

FMEException – An exception is raised if an error occurred.

hasBeenModified()

Returns whether the band has been modified from its baseline state.

Return type: bool
Returns: True, if it has been modified. False, if it has not.

hasDataBeenModifiedSinceCache()

Returns whether the band’s data has been modified from its baseline state.

Return type: bool
Returns: True, if it has been modified. False, if it has not.

hasKnownMaxValue()

Tells whether the band knows its max value.

Return type: bool
Returns: True, if it knows the max value.

hasKnownMinValue()

Tells whether the band knows its min value.

Return type: bool
Returns: True, if it knows the min value.

isSelected()

Tells whether the band is selected for operations.

Return type: bool
Returns: True if this band is selected for operations.

removePalette(paletteIndex)

Removes and returns a palette from the band.

Parameters: paletteIndex (int) – Index number of the palette.
Return type: FMEPalette
Returns: Removed palette.
Raises: FMEException – An exception is raised if an error occurred.

setCacheWindow(startRow, numRows, startCol, numCols, tileNumRows, tileNumCols)

Identifies the data that will be eligible for caching through getTile() call.

Call should be made before requesting tiles to improve caching efficiency.

Parameters

startRow (int) – Starting row number.
numRows (int) – Number of rows that will be included in cache window.
startCol (int) – Starting column number.
numCols (int) – Number of columns that will be included in cache window.
tileNumRows (int) – Number of tiles per row.
tileNumCols (int) – Number of tiles per column.

Return type

None

Raises

FMEException – An exception is raised if an error occurred.

setDeleteSourceOnDestroy(deleteFlag)

Sets delete flag, identifying whether the band should delete its source data file when destroyed.

Parameters: deleteFlag (bool) – True to delete, False not to delete.
Return type: None
Raises: FMEException – An exception is raised if an error occurred.

setMaxValue(tile)

Sets the max value of the band.

Parameters: tile (FMETile) – Max value to be set.
Return type: None
Raises: FMEException – An exception is raised if an error occurred.

setMinValue(tile)

Sets the min value of the band.

Parameters: tile (FMETile) – Min value to be set.
Return type: None
Raises: FMEException – An exception is raised if an error occurred.

setModified(modified)

Sets whether band has been modified from baseline state.

Note that hasBeenModified is initially set to False.

Parameters: modified (bool) – True when properties is altered.
Return type: None

setOutputSize(rows, cols)

Changes the size of the source data.

Parameters

rows (int) – Number of rows.
cols (int) – Number of columns.

Return type

tuple[int]

Returns

New number of rows and columns after resampling the raster.

Raises

FMEException – An exception is raised if an error occurred.

setRasterProperties(rasterProperties)

Set the raster properties.

Parameters: rasterProperties (FMERasterProperties) – Raster properties object to assign.
Return type: None
Raises: FMEException – An exception is raised if an error occurred.

setSelected(selected)

Selects/ Deselects band for operations.

Parameters: selected (bool) – True to select, False to deselect.
Return type: None

swapPopulator(populator)

Swaps the band’s populator with the passed in populator.

The new populator must match the band properties (e.g. have the same number of rows/cols, and the same interpretation).

Parameters: populator (FMEBandTilePopulator) – FMEBandTilePopulator object.
Return type: None
Raises: FMEException – An exception is raised if an error occurred. The populator will be left unchanged if this is an unsupported operation.