Calculates the length of strings and the number of bytes in a blob.


To calculate the number of bytes in a blob:

  1. Add a raster format reader (for example, TIFF).
  2. Connect a RasterExtractor followed by a StringLengthCalculator.
  3. In the StringLengthCalculator parameters, select _rasterBlob as the Source Attribute.
  4. Connect an Inspector transformer.
  5. Run the workspace.

Locate the _length attribute name in the Information Window:

Usage Notes

  • Note that in non-ASCII character sets, the length is the number of actual characters (some or all of which could be multi-byte) in the string, which may not match the number of bytes used to store the string.



Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.

Dialog Options - Tables

Transformers with table-style parameters have additional tools for populating and manipulating values.

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