EPSG:9301

<?xml version="1.0" encoding="UTF-8"?>
 <gml:ConventionalUnit xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="iogp-uom-9301">
  <gml:metaDataProperty>
    <epsg:CommonMetaData>
      <epsg:alias alias="chain" code="3348" codeSpace="urn:ogc:def:naming-system:EPSG::7301" />
      <epsg:alias alias="chSe(T)" code="3349" codeSpace="urn:ogc:def:naming-system:EPSG::7302" />
      <epsg:alias alias="chain[SeT]" code="7086" codeSpace="urn:ogc:def:naming-system:EPSG::7306" />
      <epsg:informationSource>Defence Geographic Centre</epsg:informationSource>
      <epsg:revisionDate>2015-11-25</epsg:revisionDate>
      <epsg:changes>
        <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2006.901" />
        <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2015.062" />
      </epsg:changes>
      <epsg:show>true</epsg:show>
      <epsg:isDeprecated>false</epsg:isDeprecated>
    </epsg:CommonMetaData>
  </gml:metaDataProperty>
  <gml:identifier codeSpace="IOGP">urn:ogc:def:uom:EPSG::9301</gml:identifier>
  <gml:name>British chain (Sears 1922 truncated)</gml:name>
  <gml:remarks>Uses Sear's 1922 British yard-metre ratio (UoM code 9040) truncated to 6 significant figures; this truncated ratio (0.914398, UoM code 9099) then converted to other imperial units. 1 chSe(T) = 22 ydSe(T). Used in metrication of Malaya RSO grid.</gml:remarks>
  <gml:quantityType>length</gml:quantityType>
  <gml:conversionToPreferredUnit uom="urn:ogc:def:uom:EPSG::9001">
    <gml:formula>
      <gml:b>20.116756</gml:b>
      <gml:c>1</gml:c>
    </gml:formula>
  </gml:conversionToPreferredUnit>
</gml:ConventionalUnit>