I have looked at previous postings especially one titled "re:MI-L" by = Bill Wemple (11/8/2000) which was helpful in understanding quantiles. = Essentially the quantile sets the totals for the given range equal for = each range. Great got that, but please explain when you create a = thematic map you can quantile using another column. In the explanation = Bill gave, he quantiled against the same column or in his example he was = looking at the the total population of each state quantiled by the total = population. What happens when you quantile using a different parameter? = For example when you ask for the total population quantiled by the urban = population. When I make two maps one of total population quantiled by = urban population and compare it to urban population quantiled to urban = population they are almost identical but not quite and I can't figure = out why. Furthermore why would you want to quantile using another = parameter in the first place? _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.