code: function convertShapesToCoords(shapes) {
    var tile_width = 40;
  
    var new_shapes = map2d(shapes, function(loc) {
      // It would be loc.r + 1 and loc.c + 1 but that has been removed
      // to account for the one-tile width of padding added in doParse.
      var row = loc.r * tile_width;
      var col = loc.c * tile_width;
      return {x: row, y: col}
    });
    return new_shapes;
  }
docs: Takes in an array of shapes and converts from contour grid layout
  to actual coordinates.
  @private
  @param {Array.<Array.<ArrayLoc>>} shapes - output from generateShapes
  @return {Array.<Array.<{{x: number, y: number}}>>}