Calculate mileage calculation in model builder:

Discussion created by menglish on Oct 19, 2011
Latest reply on Oct 20, 2011 by rfairhur24
I am attempting to calculate linear mileage of stream data for three predefined fields in model builder.  The conceptual approach is to calculate all segments mileage in the first field (total_miles), then calculate a fraction of the records in another field (need_miles), and finally, calculate the percentage of the two in the final field (percentage).  I'll use frequency to agregate the segments to their respective HUC 12 areas.  The problem I am having, is how to calculate geometry (linear mileage) in model builder?  I can't seem to locate the tool that may be dragged to model builder.  Thanks so much in advance!!!!