Open Universal Rest API and Json Data Model

Data Model

Hierarchical Structure

So if <uri> returns a list of vessels

   {
       "vessels": [
           "244060807": { 
              "name": "Merrimac"
              "href": "244060807"
             },
           "230029970": { 
             "name": "Cassiopeia"
             "href": "230029970"
           }      
        ]
    }

then <uri>/vessel/244060807 would return the model and the data for that vessel,<uri>/vessel/244060807/model the metadata model for what information/data items are available about that vessel and <uri>/vessel/244060807/data would return current data for just that vessel.

Furthermore just some parts of the total data set can be requested with more specific urls like <uri>/vessel/244060807/data/navigation/heading default/preferred reading

{
  "heading":"129.9",
  "reference":"Magnetic",
  "source": {
    "type:" "n2k", 
    "id":"/dev/actisense-1",
    "timestamp":"2013-10-08-15:47:28.264",
    "src":"204",
    "pgn":"127250"
  }
}

<uri>/vessel/244060807/data/navigation/heading/ note the trailing slash: all readings

[
{
  "heading":"129.9",
  "reference":"Magnetic",
  "source": {
    "type:" "n2k", 
    "id":"/dev/actisense-1",
    "timestamp":"2013-10-08-15:47:28.264",
    "src":"204",
    "pgn":"127250"
  }
},
{
  "heading":"128.9",
  "reference":"Magnetic",
  "source": {
    "type:" "n2k", 
    "id":"/dev/actisense-2",
    "timestamp":"2013-10-08-15:47:27.222",
    "src":"177",
    "pgn":"127250"
  }
},
{
  "heading":"128.9",
  "reference":"Magnetic",
  "source": {
    "type:" "nmea", 
    "id":"/dev/nmea-autopilot",
    "timestamp":"2013-10-08-15:47:25.123",
    "sentence":"HDG"
  }
}
]

Food for thought

• races and fleets: /race/2014/FIN/HelsinkiTallinna/fleet would return a list of vessels, /race/2014/FIN/HelsinkiTallinna/fleet/data/navigation/position would return the position of all vessels?
• query for location history to create GeoJSON linestring, with timestamps? https://github.com/hallahan/LeafletPlayback