Virginia, The following paragraph explains how the QUAD names are created. QUAD - A fixed-length field containing the first eight characters of the USGS map reference code. The first five digits of the code represent the degrees of latitude and longitude of the area in which the quadrangle is located. These digits are followed by a hyphen and then a two character alphanumeric grid reference to a cell within the 1-degree by 1-degree block of area. The rows within each block are coded A through H and the columns are coded 1 through 8, both beginning in the southeast corner of the 1-degree by 1-degree area. Example: 37085-A5 Then, my explanation: Since Taliaferro county is between latitudes n33 and n34 and almost entirely between longitudes w82 and w83, all the QUAD maps would begin with 33082. Since there are 60 minutes in each degree, when they divide each degree up into 7.5 minute squares, they get 64 QUAD maps in each square degree. The bottom (south) row of these QUAD maps are named A1, A2, A3 ... A8 (beginning at the east end). The next row would be B!, B2, ... B8. With a little calculation, I believe your entry for Beaverdam Creek: Beaverdam Creek GA Taliaferro stream 333315N 0824326W Cadley would show up on the 33082-E6 quadrangle map, which for some reason has been named "Cadley." The specific point (333315N 0824326W) turns out to be very near to the point where Beaverdam Creek flows into Williams Creek, which forms the east boundary of Taliaferro county. The town of Cadley is 4.0 miles ESE of the Beaverdam Creek end and would be on the 33082-E6 quadrangle map. If you are not confused enough by this, ask again. bruce