stationBoxArea

Accepts stations that occur within the latitude longitude box defined here

Example 

<stationBoxArea>
  <latitudeRange>
    <min>35</min>
    <max>35</max>
  </latitudeRange>
  <longitudeRange>
    <min>-80</min>
    <max>-80</max>
  </longitudeRange>
</stationBoxArea>

This consists of

Places this can be found

fdsnStation contains this directly

In station there is a choice between all of the following