sample.svg

<?xml version='1.0' encoding='UTF-8'?>
<svg width="178" height="86.0" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
    <pattern id="grid" x="10" y="10" width="52" height="32.0" patternUnits="userSpaceOnUse">
      <path fill="none" stroke="black" stroke-width="4" d="M 52 0 L 0 0 0 32.0" />
    </pattern>
  </defs>
  <rect width="178" height="86.0" fill="#fff" />
  <rect width="158" height="66.0" fill="url(#grid)" x="10" y="10" />
  <g font-size="20" font-family="monospace">
    <text x="18.5" y="33.0">g1</text>
    <text x="70.5" y="33.0">L7</text>
    <text x="122.5" y="33.0">A0</text>
    <text x="18.5" y="65.0">Z3</text>
    <text x="70.5" y="65.0">D2</text>
    <text x="122.5" y="65.0">B9</text>
  </g>
</svg>