SCI4THIS

def unroll_flags: .flags | 
    map(  if .REPEAT_FLAG
          then (. as $flag | range(.repeat_count + 1) | $flag)
          else . end
       );

def build_contour_map: .contourEnds |
    { i: [range(1; (. | length) + 1)],
      m: [0,map (. + 1)[]]            } as $j |
    $j.i | map([$j.m[.-1],$j.m[.]]);