Thank you.

Jim,

{$1$2} was a typo.

rdcwayx,

My files are not Latitude Longitude Degrees, but State Plane Feet.
They typically contain 3 million records.

A file looks like, PointNumber Easting Northing Elevation, as follows:

PointNumber_0000001 1000000.123456 1000000.123456 10000.123456
PointNumber_0000010 1000001.234567 1000002.234567 10345.234567
PointNumber_0000100 1000010.345678 1000020.456789 10030.987654
PointNumber_0001000 1000050.345678 1000050.456789 10030.987654
PointNumber_0010000 1000123.123456 1000456.123456 10789.123456
PointNumber_0100000 1000123.123456 1000456.123456 10789.123456
PointNumber_1000000 1000000.123456 1000000.123456 10000.123456
PointNumber_2000000 1000011.345678 1000021.456789 10030.987654
PointNumber_3000000 1000051.000678 1000049.999000 10030.987654

Where, relative to fields 2 and 3:
PointNumber_1000000 is an "exact duplicate" of PointNumber_0000001
PointNumber_0100000 is an "exact duplicate" of PointNumber_0010000
Where, relative to fields 2 and 3, and within a user defined range of + or - 2.0:
PointNumber_2000000 is a "near duplicate" of PointNumber_0000100
PointNumber_3000000 is a "near duplicate" of PointNumber_0001000

So a point/record is a "near duplicate" when the easting and northing are within a user defined range. So if I use a value of 2.75 feet for a range, then if a record has easting and northing that are within 2.5 feet of any other record then it it to considered a "near duplicate" and deleted.

If possible, it would be great if I could get two files from the input file:
1. An output file with the near duplicates removed.
2. An output file with the near duplicates that were removed.

Thank you again,
Kenny.

---------- Post updated at 01:38 PM ---------- Previous update was at 09:25 AM ----------

Jim,

When I use your code on the sample data set in my previous post, it prints the whole file.

Kenny.