Syntax

   @ProcessRasterTiles([REJECTABLE],DESTROY[,<pattern>[,<num tile rows>,<num tile cols>]])
   @ProcessRasterTiles([REJECTABLE],MINMAX[,<pattern>])
   @ProcessRasterTiles([REJECTABLE],DATAEXTENTS)

Arguments

   REJECTABLE

      Specifies if the function will supply a rejection code and message
      to the invalid feature and output it to the rejected port, or will
      fail upon being supplied invalid features.

      A feature can be rejected for the following reasons:
         - The feature has invalid geometry
         - The raster has no bands

   <mode>   
   
      DESTROY | MINMAX | DATAEXTENTS

      A string that specifies what operation to perform.

      DESTROY reads all the tile(s) of the raster.
   
      MINMAX adds attributes identifying the minimum and maximum values of the 
      bands and palettes.
   
      DATAEXTENTS adds attributes identifying the minimum and maximum row and 
      column of the raster that contains data (i.e. is not nodata).

   <pattern>   
   
      BAND | TILE   
      
      A string that specifies what pattern to read the tiles in.

      BAND means read each band one at a time (BSQ). Tiles may be used to 
      partition each band into manageable chunks.
   
      TILE means read each of the raster tiles one at a time until all tiles are 
      consumed. Several bands may be read for a given tile.
      
      Default: BAND

   <num tile rows>   
   
      Unsigned integer  
      
      An unsigned integer that specifies the number of tile rows. A value of 0 
      defaults to the size reported by the band. This is only used in DESTROY 
      mode.

   <num tile cols>   
   
      Unsigned integer  
      
      An unsigned integer that specifies the number of tile columns. A value of 
      0 defaults to the size reported by the band. This is only used in DESTROY 
      mode.

Description

   The @ProcessRasterTiles function processes all the tile(s) of the raster. The 
   <mode> parameter specifies what processing is done on the input.

   In DESTROY mode, all the tile(s) of the raster are requested, but no actual 
   operations are performed on the tile(s). 

      Note: This mode is mostly for testing performance and code path execution 
      or for narrowing down problems in a workspace by eliminating the writer. 
      This mode may not be very useful in most translation scenarios. Two 
      optional parameters can be used to specify the tile's number of rows and 
      columns, both of which must be set for them to be taken into account.

   In MINMAX mode, the minimum and maximum of each band and palette are added as 
   attributes to the raster. The following band and palette attributes are 
   created:

      _band{}.min
      _band{}.max
      _band{}.palette{}.keyMin
      _band{}.palette{}.keyMax
      _band{}.palette{}.valueMin
      _band{}.palette{}.valueMax

      Note: Wherever "{}" occurs above, there will be one instance of the 
      attribute for each band or palette. The first will appear with {0}, the 
      second with {1}, and so on.

   Any nodata values that are present on the bands of the raster are ignored in 
   the minimum and maximum value calculations.

   In DATAEXTENTS mode, the minimum and maximum row and column of the raster 
   that contain data are added as attributes to the feature. A cell is 
   considered to be nodata when, for each selected band, the value for that cell 
   is equal to that band's nodata value. If any cell value is not equal to that 
   band's nodata value, the cell will be considered data. The following 
   attributes are created:

      _data_min_row
      _data_min_column
      _data_max_row
      _data_max_column

   Input features must contain raster geometries only.