Hello, This is my second request. I wasn't sure if it made it to the list or not. Usually I hear from someone. I am trying to query the object length of line layer that fall within a region layer. The query appears to work, but when I try and verify the total length, I do not arrive at the same answer as MapInfo. I use the distance function to measure the portion of the line object falling outside the region object. I then subtract that number from the length of the line object and total. The lines may extend outside the boundary of one into another region. If I clip the lines at the each regions boundary, both MapInfo and I arrive at the same length. Could someone explain what MI is computing. Here is the SQL Query I used: Select: sum(objlength(obj,"km")"Total Length", claim Tables: claim, conductors Where: claim.obj contains conductors.obj Group by: claim TIA Peter [EMAIL PROTECTED] ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]