Transform - Tiles: Expression

The Expression template appears in the template list when a raster tile field, of type Tile, has been picked in the Transform pane.  The template computes the specified SQL expression that evaluates to a Tile data type.



Save the numeric result of the given expression into the specified numeric Result destination, creating new fields using the specified numeric type.


Launch the template by choosing a Tile field and then double-clicking the Expression template.  When the template launches we can specify options.





See Also

Transform Pane


Transform Reference


Transform - Tiles


Example: TileMaskRange Expressions - Using the TileMaskRange SQL tile function within an expression in the Transform pane to mark as missing pixels a desired range of pixel values in a single channel Landsat image. The TileMaskRange function is a fast way to eliminate unwanted black or white regions outside of non-rectangular visible pixel regions, like the black border regions in a rotated Landsat image.