I tried adding elevations of 0 to the bottom left hand of the grid in order to make my data more rectangular but that gave me essentially the same graph. So this is not a possible solution.

David

Hello,

Thanks for the quick response. I tried what you said, but I still got a funky plot, although not as bad as last time. This should be a plot about 45x60 units, with heights ranging from -1 to 1 (or less).

Here is the code I used and the resulting graph.I am not even sure what it is plotting below. It seems to have left out one of the axis.

L := convert(a, listlist);

[[3.0, 29.5, 0.25], [3.0, 22.5, -0.25], [3.5, 43.0, 0.625],

  [6.0, 39.0, 0.5], [7.0, 25.5, -0.75], [9.5, 43.0, 0.],

  [10.0, 35.5, 0.], [11.5, 29.5, -0.375], [11.5, 23.0, -0.625],

  [13.0, 43.0, -0.25], [18.5, 35.5, -0.5], [18.5, 43.0, -0.375],

  [18.5, 35.5, -0.5], [19.0, 29.5, -0.625], [19.5, 25.5, -1.0],

  [22.5, 26.0, 0.], [23.5, 33.0, -0.375], [24.0, 42.0, -0.25],

  [28.0, 26.0, 0.25], [29.0, 33.0, -0.125], [30.0, 42.0, -0.375],

  [33.0, 36.0, 0.], [34.0, 26.0, 0.25], [34.5, 42.0, 0.25],

  [37.0, 27.5, -2.0], [37.0, 23.5, -2.125], [37.0, 17.5, -2.5],

  [37.0, 12.0, -3.25], [37.0, 34.0, 0.125], [37.5, 29.5, -0.375],

  [38.5, 39.5, 0.5], [41.0, 27.5, -1.125], [42.0, 13.5, -3.625],

  [42.5, 43.0, 1.125], [43.0, 24.0, -1.5], [43.5, 34.0, 0.75],

  [43.5, 30.0, 0.375], [44.0, 18.0, -2.25], [45.5, 39.5, 1.0],

  [46.0, 12.0, -3.125], [49.0, 34.5, 1.875], [49.0, 41.5, 1.375],

  [49.0, 38.0, 1.5], [50.0, 29.5, 1.25], [51.5, 24.5, -1.375],

  [51.5, 18.5, -2.25], [51.5, 12.0, -2.75]]

 plots[surfdata](L, axes = boxed);