NAME
       rt90 - coordinate conversion between RT90 and SWEREF99

SYNOPSIS
       rt90 [-4567] [--from|--to] north east
       rt90 [-4567] --from|--to < coordinates
       rt90 --test
       rt90 --version
       rt90 --help

DESCRIPTION
       rt90  is  a  small utility for safely converting between the coordinate
       systems  (or  whatever  the  proper   term   is)   RT90 2.5 gon V   and
       SWEREF 99 TM.  RT90  is  the  most popular coordinate system for use in
       Sweden; SWEREF 99 is the new standard we're switching to. Both assign a
       north and an east coordinate, expressed in meters, to every spot in the
       country (and some spots outside it, I bet).

AUTHOR
       Jörgen Grahn <[email protected]>.

       The operation of rt90 relies entirely on libproj, also known as PROJ.4,
       and information on RT90/SWEREF 99 gleaned from a multitude of sources.

LICENSE
       The Modified BSD license.

For more details, see the man page from which this text
was extracted.