JSFiddle - React, Tailwind, and code Playground

HTML

<div id="map">
 <img class="map" src="images/us_map.jpg" width="960" height="593" usemap="#usa">
 <map name="usa">
  <area href="#" title="SC" shape="poly" coords="735,418, 734,419, 731,418, 731,416, 729,413, 727,411, 725,410, 723,405, 720,399, 716,398, 714,396, 713,393, 711,391, 709,390, 707,387, 704,385, 699,383, 699,382, 697,379, 696,378, 693,373, 690,373, 686,371, 684,369, 684,368, 685,366, 687,365, 687,363, 693,360, 701,356, 708,355, 724,355, 727,356, 728,360, 732,359, 745,358, 747,358, 760,366, 769,374, 764,379, 762,385, 761,391, 759,392, 758,394, 756,395, 754,398, 751,401, 749,404, 748,405, 744,408, 741,409, 742,412, 737,417, 735,418"></area>
  <area href="#" title="HI" shape="poly" coords="225,521, 227,518, 229,517, 229,518, 227,521, 225,521"></area>
  <area href="#" title="HI" shape="poly" coords="235,518, 241,520, 243,520, 244,516, 244,513, 240,512, 236,514, 235,518"></area>
 </map>
</div>

<textarea id="newAreaTags"></textarea>

CSS

#newAreaTags { width: 600px; height: 500px; }

JavaScript

$(document).ready(function(){
 var newmap = '', coords;
 $('map[name=usa]').find('area').each(function(){
  newmap += '<area href="#" title="' + $(this).attr('title') +
   '" shape="' + $(this).attr('shape') + '" coords="';
  coords = $(this).attr('coords').replace(/\s+/g,'').split(',');
  for (var i = 0; i < coords.length; i++){
   coords[i] = Math.round(parseInt( coords[i], 10) / 2);
  }
  newmap += coords.join(',') + '"></area>\n';
 });
 $('#newAreaTags').val(newmap);
})