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Instructions provided describe how to make the FeatureID (FID) field available to Spatial Analyst tools that take Features as input. FID is not normally available as a field when using a feature class as input to a Spatial Analyst tool.
To use the FID, a new field can be added to the feature class and the FID values transcribed to it.
Below is a general procedure to make FID available to Spatial Analyst tools. Some details may vary depending on the nature of the input data.
This procedure modifies the attribute table of the feature class. It is highly recommended to work on a copy of the data, to revert to the original, untouched data if necessary.
Long integer is necessary if the value range is outside of -32,768 to 32,768.
A warning message appears about performing edits outside of an Edit Session, and that changes cannot be undone. Since this procedure should be done on a copy of the data instead of the original, click Yes in the dialog box.