01-31-2008
How to uniq third field in a file
Hi ;
I have a question regarding the uniq command in unix
How do I uniq 3rd field in a file ?
original file :
zoom coord 39 18652 39 18652
zoom coord 39 18653 39 18653
zoom coord 39 18818 39 18818
zoom coord 39 18840 39 18840
zoom coord 41 15096 41 15096
zoom coord 41 15261 41 15261
zoom coord 41 15283 41 15283
zoom coord 53 16385 53 16385
zoom coord 53 16406 53 16406
desire output
zoom coord 39 18652 39 18652
zoom coord 41 15096 41 15096
zoom coord 53 16385 53 16385
Thanks
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LEARN ABOUT MOJAVE
map_slippy
map::slippy(n) Mapping utilities map::slippy(n)
__________________________________________________________________________________________________________________________________________________
NAME
map::slippy - Common code for slippy based map packages
SYNOPSIS
package require Tcl 8.4
package require Tk 8.4
package require map::slippy ?0.3?
::map::slippy length level
::map::slippy tiles level
::map::slippy tile size
::map::slippy tile valid tile levels ?msgvar?
::map::slippy geo 2tile geo
::map::slippy geo 2point geo
::map::slippy tile 2geo tile
::map::slippy tile 2point tile
::map::slippy point 2geo point
::map::slippy point 2tile point
_________________________________________________________________
DESCRIPTION
This package provides a number of methods doing things needed by all types of slippy-based map packages.
API
::map::slippy length level
This method returns the width/height of a slippy-based map at the specified zoom level, in pixels. This is, in essence, the result
of
expr { [tiles $level] * [tile size] }
::map::slippy tiles level
This method returns the width/height of a slippy-based map at the specified zoom level, in tiles.
::map::slippy tile size
This method returns the width/height of a tile in a slippy-based map, in pixels.
::map::slippy tile valid tile levels ?msgvar?
This method checks whether tile described a valid tile in a slippy-based map containing that many zoom levels. The result is a bool-
ean value, true if the tile is valid, and false otherwise. For the latter a message is left in the variable named by msgvar, should
it be specified.
A tile identifier as stored in tile is a list containing zoom level, tile row, and tile column, in this order. The command essen-
tially checks this, i.e. the syntax, that the zoom level is between 0 and "levels-1", and that the row/col information is within the
boundaries for the zoom level, i.e. 0 ... "[tiles $zoom]-1".
::map::slippy geo 2tile geo
Converts a geographical location at a zoom level (geo, a list containing zoom level, latitude, and longitude, in this order) to a
tile identifier (list containing zoom level, row, and column) at that level.
::map::slippy geo 2point geo
Converts a geographical location at a zoom level (geo, a list containing zoom level, latitude, and longitude, in this order) to a
pixel position (list containing zoom level, y, and x) at that level.
::map::slippy tile 2geo tile
Converts a tile identifier at a zoom level (tile, list containing zoom level, row, and column) to a geographical location (list con-
taining zoom level, latitude, and longitude, in this order) at that level.
::map::slippy tile 2point tile
Converts a tile identifier at a zoom level (tile, a list containing zoom level, row, and column, in this order) to a pixel position
(list containing zoom level, y, and x) at that level.
::map::slippy point 2geo point
Converts a pixel position at a zoom level (point, list containing zoom level, y, and x) to a geographical location (list containing
zoom level, latitude, and longitude, in this order) at that level.
::map::slippy point 2tile point
Converts a pixel position at a zoom level (point, a list containing zoom level, y, and x, in this order) to a tile identifier (list
containing zoom level, row, and column) at that level.
REFERENCES
[1] http://wiki.openstreetmap.org/wiki/Main_Page
KEYWORDS
geodesy, geography, latitute, location, longitude, map, slippy, zoom
map 0.3 map::slippy(n)