<p>This turned out to be slightly more complex than I expected, but it does work using the delegate method. Fixes <a href="https://github.com/openstreetmap/openstreetmap-website/issues/1509" class="issue-link js-issue-link" data-url="https://github.com/openstreetmap/openstreetmap-website/issues/1509" data-id="218229729" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#1509</a></p>
<p>In the json builder, an explicit <code>.to_f</code> is required since the builder calls <code>to_s</code> on objects that it doesn't recognise, and we would end up with strings instead of floats in the json.</p>
<p>In lib/potlatch, again we need to be explicit, since there's a hardcoded shortcut for built-in types when running <code>[n].pack("G")</code>, but adding <code>.to_f</code> sorts it out too.</p>
<p>The rest of the changes are in the tests, where testing coordinates as strings needs the corresponding changes.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/openstreetmap/openstreetmap-website/pull/1566'>https://github.com/openstreetmap/openstreetmap-website/pull/1566</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Rework coordinates to avoid scientific formatting of small numbers. Fixes #1509</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-0">app/models/node.rb</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-1">app/views/notes/_note.json.jsonify</a>
    (2)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-2">lib/bounding_box.rb</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-3">lib/geo_record.rb</a>
    (19)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-4">lib/potlatch.rb</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-5">test/controllers/api_controller_test.rb</a>
    (4)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-6">test/controllers/changeset_controller_test.rb</a>
    (24)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-7">test/controllers/relation_controller_test.rb</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-8">test/lib/bounding_box_test.rb</a>
    (16)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-9">test/models/note_test.rb</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-10">test/models/old_node_test.rb</a>
    (8)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/openstreetmap/openstreetmap-website/pull/1566/files#diff-11">test/models/tracepoint_test.rb</a>
    (8)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/1566.patch'>https://github.com/openstreetmap/openstreetmap-website/pull/1566.patch</a></li>
  <li><a href='https://github.com/openstreetmap/openstreetmap-website/pull/1566.diff'>https://github.com/openstreetmap/openstreetmap-website/pull/1566.diff</a></li>
</ul>

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