*/current, location data

API with real-time geolocation data, for TV graphics, speed monitor, gap time calculation, ...

Request

URL https://racemap.com/api/data/v1/:eventId/current Method GET

Live sample https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current Corresponding map https://racemap.com/player/100KmDuathlon2018_API-live-sample

Optional query parameters

Set various query parameters according to your need when calling the API endpoint, e.g. to smoothen gap values.

Id

• The Id of a chosen reference participant for calculation gapAverage, gap, gapChase and gapDistance.

• String for API ?deviceId=66bf4318d1c783279d183e3d

• Sample https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?deviceId=66bf4318d1c783279d183e3d

startNumber

• The startNumber of a chosen reference device for calculation gapAverage, gap, gapChase and gapDistance.

• String for API ?startNumber=053

• Sample: https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?startNumber=053

interpolation

• true or false

• Default: true

• The raw geodata from the GPS devices is converted into a grid. The interpolation interval specifies the time difference between consecutive coordinates in this grid.

• Default interpolation interval: 10 sec. Adjust the interpolation interval in the advanced settings of the tracking map.

• Sample https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?interpolation=false

currentSpeedDuration

• Duration in seconds to average the speed values in the API. If currentSpeedDuration is set to 120, then the average speed of the last 2 minutes is calculated.

• Default: 300 seconds

• Maximum value: 1800

• String for API ?currentSpeedDuration=120

• Sample https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?currentSpeedDuration=120

liveDelay

• Duration in seconds from the timestamp recording a location until this location is provided in the API.

• Default: 20, according to "Live delay time" in advanced settings of the tracking map. The set liveDelay query parameter processes the values in the API without impact on the visualization.

• Maximum value: 1800

• String for API ?liveDelay=200

• Sample https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?liveDelay=200

You can call the same API endpoint with different query parameters at the same time. You can also combine queries with & in one call eg. https://racemap.com/api/data/v1/66bf4318d1c783279d183dd3/current?liveDelay=600&interpolation=false&currentSpeedDuration=600&deviceId=66bf4318d1c783279d183e3d

Response

Event object

Field	Description [unit]	Sample
name	Name of event	"100km Duathlon"
location	Location	"Dresden"
startTime	Start time in UTC	"2022-01-24T15:00:10.000Z"
endTime	End time in UTC	"2022-01-24T22:59:45.000Z"
starters	Array for participant objects

Participant object

Field	Description [unit]	Sample
id	Unique Racemap ID of participant	"61a2122f181c0a0ff7b53765"
name	Name	"CLV Megware"
startNumber	Bib number	"001"
importId	User-defined ID with imported participant data, Generic API (importId) or RACE|RESULT API (Id)	"UniqueImportId_1" or null if no importId exists
current	Object for real-time location data	null if no locations within startTime and endTime
device	Object for device information	null if device is not used in tracker management

Current object

• current-object provides the latest data

• (*) calculated only for events with a shadowtrack, projection of device locations on the shadowtrack within 100 m distance from shadowtrack

• gapAverage, gap, gapChase and gapDistance are calculated for the leader by default. Leader: device with the smallest toFinish value. Attention: Each time a leader reaches the finish the device closest to the finish becomes the new leader. The speed value of the next leader may impact fluctuating gap values. Reference: If query with deviceId or startNumber, then calculation with reference values instead of leader.

Field	Description [unit]	Sample
time	Timestamp in UTC when geolocation was recorded, if interpolation=true then linear interpolation between the latest two points	"2022-01-24T16:33:47.012Z"
lng	Current longitude of participant	13.727678288
lat	Latitude	50.976534023
elv	Altitude above zero on shadowtrack [m]	85.2 or null if device is not on shadowtrack
speed	Average speed [m/s] depending on currentSpeedDuration. If event has a shadowtrack, than projection on shadowtrack. If event without shadowtrack, than same value as speedRaw.	5.2727
speedRaw	Average speed [m/s] depending on currentSpeedDuration. Calculation with interpolated raw coordinates.	4.9574
fromStart *	Distance from first geolocation of shadowtrack along shadowtrack [m]	9962.6826
toFinish *	Distance to last geolocation of shadowtrack along shadowtrack [m]	89097.3173
distanceToShadowTrack *	Distance from shadowtrack [m] if more than 100 m	175.9
eta *	Estimated time of arrival [s], time to reach last geolocation of shadowtrack, prediction with speed	16897.77
gapAverage *	Duration [s] to reach current toFinish value of the leader, prediction with leader's average speed for current segment between device and leader.	2360.36 or null if reference is behind device, toFinish of reference is greater than toFinish of device
gap *	Duration [s] to reach current toFinish value of the leader, prediction with speed value of leader, if speed < 1 km/h then prediction with default speed value of the event,	1205.68 or -581.20 if reference is behind device
gapChase *	Duration [s] to reach current toFinish value of the leader, prediction with speed value of device, if speed < 1 km/h then prediction with default speed value of the event	968.81 or -73.02 if reference is behind device
gapDistance *	Distance [m] to reach current toFinish value of the leader.	3364.91 or -554.03 if reference is behind device

Device object

The device object provides additional information for GPS trackers, that are used in tracker management.

Tracker management

Field	Description [unit]	Sample
externalId	Unique id of tracking device, can be IMEI or transponder id or App id depending on the type of device.	"4106050246" or "860599002489748" or "RRPing_ZDKAR32" or "d40ad78e-b929-4224-967e-62ca93effc68"
battery	Charge level [%] of device.	3, 52, 99
online	Connection status with RACEMAP server, determined by checking if there is a socket connection to the device and evaluating the time since the last message was received.	true or false
lastLocationGpsFix	Showing whether the device had a GPS fix when recording the latest coordinate.	true or false
lastLocationAt	Timestamp in UTC when the latest coordinate was recorded. Note: If interpolation=true lastLocationAt can differ from time.	"2022-01-24T16:33:47.012Z"
deviceId	Unique id of the tracking device in RACEMAP.	"5b6ac1561c6a700020a00010"

The GPS tracker does not send the information when it loses the GPS fix. If the device loses the fix, no coordinates are recorded. Therefore, evaluating online status along with lastLocationAt provides a more reliable observation than relying solely on the lastLocationGpsFix parameter.

If online is true but there is no current lastLocationAt:

• Device may have lost its GPS fix and is unable to record coordinates.

• Could suggest potential tampering or manipulation, also.

If online is false:

• Device may have lost its network connection.

• Device may have been turned off, also.

Sample response

{
  "name": "Sample live API | 100km-Duathlon",
  "location": "🇩🇪 Dresden",
  "startTime": "2024-08-16T12:05:07Z",
  "endTime": "2024-08-16T16:04:31Z",
  "starters": [
    {
      "id": "66bf4318d1c783279d183e3b",
      "name": "Wolfsrudel Mädels",
      "startNumber": "053",
      "importId": null,
      "current": {
        "time": "2024-08-16T12:34:00Z",
        "lng": 13.73032,
        "lat": 51.00622,
        "elv": 218,
        "speed": 2.94017094017094,
        "speedRaw": 1.6961880220903458,
        "fromStart": 5340,
        "toFinish": 93720,
        "distanceToShadowTrack": 4.759105903942731,
        "eta": 31875.697,
        "gapAverage": 900,
        "gap": 359.005,
        "gapChase": 387.732,
        "gapDistance": 1140
      },
      "device": {
        "externalId": "ecbbaaa4-c968-46db-9b07-afc842387e27",
        "battery": 40,
        "online": false,
        "lastLocationGpsFix": true,
        "lastLocationAt": "2024-01-05T13:45:24Z"
        "deviceId": "5b6ac1561c6a700020a00135"
      }
    },
    {
      "id": "66bf4318d1c783279d183e1d",
      "name": "Lokomotive Prießnitzgrund",
      "startNumber": "034",
      "importId": null,
      "current": {
        "time": "2024-08-16T12:34:00Z",
        "lng": 13.70232,
        "lat": 51.02038,
        "elv": 204,
        "speed": 1.435897435897436,
        "speedRaw": 1.1986131178696222,
        "fromStart": 890,
        "toFinish": 98170,
        "distanceToShadowTrack": 6.054100654596742,
        "eta": 68368.392,
        "gapAverage": 2280,
        "gap": 1760.386,
        "gapChase": 3893.035,
        "gapDistance": 5590
      },
      "device": null
    },
    {
      "id": "66bf4318d1c783279d183e51",
      "name": "Dude, where's the finish line?",
      "startNumber": "039",
      "importId": null,
      "current": {
        "time": "2024-08-16T12:27:11.254Z",
        "lng": 13.70364238,
        "lat": 51.02187489866667,
        "elv": 200,
        "speed": 2.1403508771929824,
        "speedRaw": 1.8131895855527116,
        "fromStart": 665.016,
        "toFinish": 98394.984,
        "distanceToShadowTrack": 11.873080816329555,
        "eta": 45971.426,
        "gapAverage": 1338,
        "gap": 1650.853,
        "gapChase": 1999.667,
        "gapDistance": 4279.989333333331
      },
      "device": {
        "externalId": "999994106050526",
        "battery": 40,
        "online": false,
        "lastLocationGpsFix": true,
        "lastLocationAt": "2023-07-02T12:37:51Z"
        "deviceId": "5b3a7b3ebd61c4491dcfcef4"
      }
    }
  ]
}

Smoothen values in the API

The below parameters and settings smoothen the values in the API.

• Call the gapAverage value instead of gap value

• Interpolation=true

• Query parameter currentSpeedDuration

Use gapAverage instead of gap if you need smoothly changing gap values e.g. for TV production.

the average speed of the reference device smoothens the gapAverage values in the API

Comparison	interpolation=true	interpolation=false
Use case	Values changing smoothly with each call	Latest values with a minimum delay
Calculation	Linear interpolation between latest coordinate in the time grid and the coordinate before	Latest coordinate without interpolation from the time grid
Refresh rate	Up to 1 sec	Report interval of GPS device
Recommended interpolation interval	report interval of GPS device	report interval of GPS device
Recommended liveDelay	5 sec + interpolation interval	5 sec minimum

Increase the currentSpeedDuration query parameter to smooth the speed values in the API.

Subsequent calculations

You can calculate on your side using the */current API.

Gap distance between two participants: fromStart (participant 1) - fromStart (participant 2)

Gap duration between two participants:

• option 1: gapAverage (participant 2) - gapAverage (participant 1) => value with flatten peaks

• option 2: eta (participant 2) - eta (participant 1)

• option 3: gap (participant 2) - gap (participant 1)

Identify the leader: the smallest value of toFinish