The folder \Update contains CORRECTED .ascii and .dgn files for 81 tiles. These files should be used to REPLACE the files in the other folders. The statement below comes from one of the contractors charged with using the data and describes the problems solved by these update files:

"The LIDAR data for Wyoming County was processed incorrectly, and resulted in a flawed terrain model along the stream corridors. The breaklines generated by Enerquest do not correspond to the nearby mass points, so when Enerquest merged the breaklines and mass points to create an evenly-spaced 10-foot point matrix, the interpolated surface was corrupted."