# A tibble: 6 x 5
     gx    gy meanelev convex slope
  <dbl> <dbl>    <dbl>  <dbl> <dbl>
1   980   380     131. -0.405  2.31
2   980   400     132. -0.675 14.6 
3   980   420     133.  0.465 17.9 
4   980   440     131.  1.03  16.6 
5   980   460     131. -2.17  12.0 
6   980   480     132. -1.65   4.20
