How to filter out almost dupicate X Y (Easting Northing) coordinates?


 
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Top Forums UNIX for Dummies Questions & Answers How to filter out almost dupicate X Y (Easting Northing) coordinates?
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Old 09-22-2010
Gentlemen,

I thank you very much for your efforts in try to helping me with this code.

As I said, note that I am working in a Microsoft Windows XP command prompt window environment. Not sure if that will have any effect on the syntax.

I put your code into a command text file.
I can't seem to get the code to work without errors when listed vertically, so
I had to put it all on one line, and then type.....
mawk -v range=5 -f awk_commands.txt FileIn.txt

But......

All it does is print the complete contents of the input file (plus that extra "secret" column) to the screen, and does not create the duplicate and unique files.

The other strange behaviour is that no matter what value I use for range, a negative number, 0, or 1000000, I get the same output:

PointNumber_0000001 1000000.123456 1000000.123456 10000.123456 1000001.75
PointNumber_0000010 1000001.234567 1000002.234567 10345.234567 1000001.75
PointNumber_0000100 1000010.345678 1000020.456789 10030.987654 1000012.75
PointNumber_0001000 1000050.345678 1000050.456789 10030.987654 1000051.25
PointNumber_0010000 1000123.123456 1000456.123456 10789.123456 1000125.50
PointNumber_0100000 1000123.123456 1000456.123456 10789.123456 1000125.50
PointNumber_1000000 1000000.123456 1000000.123456 10000.123456 1000001.75
PointNumber_2000000 1000011.345678 1000021.456789 10030.987654 1000012.75
PointNumber_3000000 1000051.000678 1000049.999000 10030.987654 1000051.25[/SIZE][/SIZE]
 
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Geo::Coordinates::ITM(3pm)				User Contributed Perl Documentation				Geo::Coordinates::ITM(3pm)

NAME
Geo::Coordinates::ITM - Convert coordinates between lat/lon and Irish Transverse Mercator VERSION
This document describes Geo::Coordinates::ITM version 0.02 SYNOPSIS
use Geo::Coordinates::ITM qw( ll_to_grid grid_to_ll ); my ( $lat, $lon ) = grid_to_ll( $east, $north ); my ( $east, $north ) = ll_to_grid( $lat, $lon ); DESCRIPTION
Convert back and forth between Irish Transverse Mercator grid and WGS84. The conversion code was stolen wholesale from <http://bit.ly/ZqpUA>. http://svn.geograph.org.uk/svn/branches/british-isles/libs/geograph /conversionslatlong.class.php Nothing is exported by default. The exportable functions are "ll_to_grid" and "grid_to_ll". INTERFACE
"ll_to_grid" Convert a latitude, longitude (WGS84) coordinate pair into an ITM easting and northing. my ( $east, $north ) = ll_to_grid( $lat, $lon ); "grid_to_ll" Convert an ITM easting, northing pair to a WGS84 latitude, longitude. my ( $lat, $lon ) = grid_to_ll( $east, $north ); BUGS
Please report any bugs or feature requests to "bug-geo-coordinates-itm@rt.cpan.org", or through the web interface at <http://rt.cpan.org>. AUTHOR
Andy Armstrong "<andy@hexten.net>" Code gratefully stolen from <http://bit.ly/ZqpUA> http://svn.geograph.org.uk/svn/branches/british-isles/libs/geograph /conversionslatlong.class.php LICENCE AND COPYRIGHT
Copyright (c) 2009, Andy Armstrong "<andy@hexten.net>". This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic. perl v5.14.2 2012-03-31 Geo::Coordinates::ITM(3pm)