Sequential Numbers
In ArcMap, here is how you can calculate sequential numbers using Field Calculator. Set field calculate to python. Paste this in pre logic script: rec=0 def autoIncrement(): global rec pStart = 1 pInterval = 1 if (rec == 0): rec = pStart else: rec += pInterval return rec Paste this in second box autoIncrement() Check out one of my other posts about how to Convert from Degrees Minutes Seconds to Decimal Degrees in Python here . Happy GISing! Lindsy Hales Bentley