function dantzig42_xy = tsp_dantzig42_xy ( )

%*****************************************************************************80
%
%% tsp_dantzig42_xy() returns the location data for the Dantzig 42 city TSP challenge.
%
%  Discussion:
%
%    The original values 
%
%     147.5,  36.0; ...
%     154.5,  45.0; ...
%
%    were adjusted to 
%
%     147.0,  36.0; ...
%     154.0,  45.0; ...
%
%    so that all coordinates are integers.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    20 July 2026
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    real tsp_dantzig42_xy(48,2): the x and y coordinates of the cities.
%
  dantzig42_xy = [
      170.0,  85.0; ...
      166.0,  88.0; ...
      133.0,  73.0; ...
      140.0,  70.0; ...
      142.0,  55.0; ...
      126.0,  53.0; ...
      125.0,  60.0; ...
      119.0,  68.0; ...
      117.0,  74.0; ...
       99.0,  83.0; ...
       73.0,  79.0; ...
       72.0,  91.0; ...
       37.0,  94.0; ...
        6.0, 106.0; ...
        3.0,  97.0; ...
       21.0,  82.0; ...
       33.0,  67.0; ...
        4.0,  66.0; ...
        3.0,  42.0; ...
       27.0,  33.0; ...
       52.0,  41.0; ...
       57.0,  59.0; ...
       58.0,  66.0; ...
       88.0,  65.0; ...
       99.0,  67.0; ...
       95.0,  55.0; ...
       89.0,  55.0; ...
       83.0,  38.0; ...
       85.0,  25.0; ...
      104.0,  35.0; ...
      112.0,  37.0; ...
      112.0,  24.0; ...
      113.0,  13.0; ...
      125.0,  30.0; ...
      135.0,  32.0; ...
      147.0,  18.0; ...
      147.0,  36.0; ...
      154.0,  45.0; ...
      157.0,  54.0; ...
      158.0,  61.0; ...
      172.0,  82.0; ...
      174.0,  87.0 ];

  return
end

