Do you ever need to display the temporal aspect of features? We have traffic studies all over the city, and it's nice to color code them based on their age. There isn't an "age" renderer that you can use, but you can calculate a new field as a number representing the number of days since some abrbitrary point in the distant past and then use one of the Quantity renderers like Graduated Colors to symbolize old features and new on color ramp!
from mx import DateTime as dt import arcgisscripting gp = arcgisscripting.create(9.3)
def convertDate(theDate): '''use mx.DateTime to get COM days since epoch. MS Access needs this format''' m,d,y = theDate.split('/') # date format is mm/dd/yyy d = dt.Date(int(y), int(m), int(d)) return d.COMDate()
fc = r"C:\StagingDBs\slcdot.gdb\trafficStudies\volumes"
cur = gp.updatecursor(fc) row = cur.next() while row: aDate = row.STARTDATE if aDate: seqDate = convertDate(aDate) row.dateCode = seqDate cur.UpdateRow(row) row = cur.next() else: row = cur.next()
