Are there any limits to class ID values (i.e., the unique integer value assigned to each distinct class or patch type)?
All classes must have non-zero integer values; that is, zero should not be used as a class value because it is impossible to assign a negative value to zerio to distinguish cells of that class that are outside the landscape boundary. Otherwise, there are no limits to the class values that can be used, although it is logical to use the smallest numbers possible.