Washington, DC metro area - location with a boundary

{
  "resourceType": "Location",
  "id": "wash-dc-metro",
  "meta": {
    "profile": [
      "http://hl7.org/fhir/uv/vhdir/StructureDefinition/vhdir-location"
    ]
  },
  "text": {
    "status": "extensions",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: Location</b><a name=\"wash-dc-metro\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource Location &quot;wash-dc-metro&quot; </p><p style=\"margin-bottom: 0px\">Profile: <code>http://hl7.org/fhir/uv/vhdir/StructureDefinition/vhdir-location</code></p></div><p><b>Boundary (GeoJSON)</b>: </p><p><b>status</b>: active</p><p><b>name</b>: <span title=\"  this record is active  \">Washington, DC metro area</span></p><p><b>form</b>: Area <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/3.1.0/CodeSystem-location-physical-type.html\">Location type</a>#area)</span></p></div>"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/location-boundary-geojson",
      "valueAttachment": {
        "contentType": "application/geo+json",
        "data": "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",
        "url": "https://github.com/OpenDataDE/State-zip-code-GeoJSON/raw/master/dc_district_of_columbia_zip_codes_geo.min.json",
        "size": "389"
      }
    }
  ],
  "status": "active",
  "name": "Washington, DC metro area",
  "form": {
    "coding": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/location-physical-type",
        "code": "area",
        "display": "Area"
      }
    ]
  }
}