I am a first time database developer working on an Access database. I have a list of 200,000 customer records that have Latitude and Longitude coordinates (formatted in decimals, like: 40.72323 = Latitude and -73.99569 = longitude). I know the coordinates of 700 points of sale and I know the closest point of sale and the "crow flies distance" to that closest point of sale. I would like to add to my table of customers the drive distance to the closest point of sale. Thus I have a table: [cust_ID], [CLOSEST_POS_ID], [customer_latitude], [customer_longitude], [closest_POS_latitude] and [closest_POS_longitude], [drive_distance]. I would like to be able to do an update query that would populate the [drive_distance] field with the actual drive distance. Thus far, in my fledgling developer career, I have not "connected" with another program (please be specific). Thanks for your help.