var unitID = "area";
var defaultUnitIndex = 11;

var units = [
  ["acres",                      4046.8564224],
  ["ares",                       100],
  ["circular inches",            0.000506707479],
  ["hectares",                   1e4],
  ["hides",                      485000],  
  ["roods",                      1011.7141056],
  ["square centimeters",         1e-4],
  ["square feet (US & UK)",  0.09290304],
  ["square feet (US survey)",    0.092903411613],
  ["square inches",              0.00064516],
  ["square kilometers",          1e6],
  ["square meters",              1],
  ["square miles",               2589988.110336],
  ["square millimeters",         1e-6],
  ["squares (of timber)",        9.290304],
  ["square rods (or poles)",     25.29285264],
  ["square yards",               0.83612736],
  ["townships",                  93239571.972]
];