Washington, DC metro area - location with a boundary (id = "wash-dc-metro")

<?xml version="1.0" encoding="UTF-8"?>

<Location xmlns="http://hl7.org/fhir">
  <id value="wash-dc-metro"/> 
  <meta> 
    <profile value="http://hl7.org/fhir/uv/vhdir/StructureDefinition/vhdir-location"/> 
  </meta> 
  <extension url="http://hl7.org/fhir/StructureDefinition/location-boundary-geojson">
    <valueAttachment> 
      <contentType value="application/geo+json"/> 
      <!--   https://raw.githubusercontent.com/johan/world.geo.json/master/countries/USA/DC/District%20o
      f%20Columbia.geo.json   -->
      <data value="VGhlbWU6IA0KUmF3UGFyc2VkDQp7InR5cGUiOiJGZWF0dXJlQ29sbGVjdGlvbiIsInByb3BlcnRpZXMiOnsia2luZCI6I
      nN0YXRlIiwic3RhdGUiOiJEQyJ9LCJmZWF0dXJlcyI6Ww0KeyJ0eXBlIjoiRmVhdHVyZSIsInByb3BlcnRpZXMiOnsia2l
      uZCI6ImNvdW50eSIsIm5hbWUiOiJEaXN0cmljdCBvZiBDb2x1bWJpYSIsInN0YXRlIjoiREMifSwiZ2VvbWV0cnkiOnsid
      HlwZSI6Ik11bHRpUG9seWdvbiIsImNvb3JkaW5hdGVzIjpbW1tbLTc3LjAzNTMsMzguOTkzOV0sWy03Ny4wMDI0LDM4Ljk
      2NjVdLFstNzYuOTA5MywzOC44OTUzXSxbLTc3LjA0MDcsMzguNzkxMl0sWy03Ny4wNDYyLDM4Ljg0MDVdLFstNzcuMDQwN
      ywzOC44NzM0XSxbLTc3LjExNzQsMzguOTMzNl1dXV19fQ0KXX0="/> 
      <!--   And a higher resolution boundary can be found here   -->
      <url value="https://github.com/OpenDataDE/State-zip-code-GeoJSON/raw/master/dc_district_of_columbia_zip_c
      odes_geo.min.json"/> 
      <size value="389"/> 
    </valueAttachment> 
  </extension> 
  <status value="active"/> 
  <!--   this record is active   -->
  <name value="Washington, DC metro area"/> 
  <form> 
    <!--   This location is a collection of buildings or other locations such as a site
     or a campus   -->
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/location-physical-type"/> 
      <code value="area"/> 
      <display value="Area"/> 
    </coding> 
  </form> 
</Location>