json format for geo data

Common minimal format for sending just lat/long data
[
	{
		uuid: "550e8400-e29b-41d4-a716-446655440000",
		date: "2010-04-30T16:50:00Z",
		location: {
			position: {
                                    geojson: { "type": "Point", 
                                    "coordinates": [11.0, 61.0] } 
                        }
		}
	},
	{
		uuid: "550e8400-e29b-41d4-a716-446655440001",
		date: "2010-04-30T16:50:00Z",
		location: {
			position: {
                                    geojson: { "type": "Point", 
                                    "coordinates": [101.0, 50.0] } 
                        }
		}
	}
]

Full data format allowing custom information to be included based on source of location data
[{
	uuid: "550e8400-e29b-41d4-a716-446655440000",
	date: "2010-04-30T16:50:00Z", (iso8601 format)
	location: {
		position: {
			geojson: { "type": "Point", 
                                    "coordinates": [45.5, -122.636] }
			altitude: null,
			heading: 190,
			speed: 56,
			horizontal_accuracy: 6.0
			vertical_accuracy: 75.0
		}
		source: "hardware_gps,wifi,street_address,agps,twitter,foursquare,geomena"
		type: "latlng,address,neighborhood,city",
		raw: (from hardware gps device) {
			dop_h: 2.7,
			dop_v: 2.1,
			satellites: []
		},
		raw: (from wifi positioning) {
			aps: []
		}
		raw: (from twitter) {
			id: "103994853",
			created_at: "Tue Apr 07 22:52:51 +0000 2009",
			text: "At least I can get your humor through tweets. RT @abdur: I don't mean this in a bad way, but genetically speaking your a cul-de-sac.",
			source: "<a href="http://www.tweetdeck.com/">TweetDeck</a>",
			....etc....
		},
		geo_json: { 
			"type": "Polygon",
			"coordinates": [
					[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ],
					[ [100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2] ]
				]
			}
		}
	},
	environment: {
		air_temperature: {
			celsius: 20.3
		},
		humidity: {
			percent: 80
		},
		sound_pressure_level: {
			pascals: 10
		}
	},
	body: {
		heart_rate: {
			bpm: 100
		},
		core_temperature: {
			celsius: 25
		}
	}
}]


Format for querying positions of multiple users:
[{
	user: {
		id: "http://aaron.pk",
		display_name: "aaronpk",
		url: "http://aaronparecki.com",
		image_url: "http://aaron.pk/pic.jpg"
	},
	data: []
},
{
	user: {
		id: "@caseorganic",
		display_name: "caseorganic",
		url: "http://oakhazelnut.com",
		image_url: "http://a1.twimg.com/profile_images/116264220/kk-caseorganic-48px.jpg"
	},
	data: []
}]