Hello Does anyone know the formula or method for calculating the distance in miles between to latitude/longitude points. The projection is NAD 83. Either a formula or a MI solution would be acceptable. Thanks, Lisa Cloutier Metricom, Houston ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]