Measurement location table

Measurement location table

General

The configuration file for the AVG (MeasurementSiteTablePublication) contains the following information for all locations where it is measured:

  • Measurement location configuration
  • Location reference measurement location

This page explains the contents of the file. For more substantive information about measuring points click here. For more information about measurement sites click here.

General elements of MeasurementSiteTablePublication

The MeasurementSiteTablePublication uses the Datex II d2LogicalModel.

Element Explanation
exchange The element is used to exchange data related to the delivery
supplierIdentification Describes the sending / delivering party
<d2LogicalModel xmlns="http://datex2.eu/schema/2/2_0" modelBaseVersion="2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <exchange>
        <supplierIdentification>
            <country>nl</country>
            <nationalIdentifier>NLNDW</nationalIdentifier>
        </supplierIdentification>
    </exchange>
    <payloadPublication xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="MeasurementSiteTablePublication" lang="nl">
        <publicationTime>2017-09-01T11:00:00.000Z</publicationTime>
        <publicationCreator>
            <country>nl</country>
            <nationalIdentifier>NLNDW</nationalIdentifier>
        </publicationCreator>
        <headerInformation>
            <confidentiality>noRestriction</confidentiality>
            <informationStatus>real</informationStatus>
        </headerInformation>
        <measurementSiteTable id="NDW01_MT" version="939">
        ..
        </measurementSiteTable>
    </payloadPublication>
</d2LogicalModel>

In the above example, the attribute xsi: type of the PayloadPublication indicates that use has been made of the specialization “MeasurementSiteTablePublication”. In addition, the following elements were used to provide extra information about the data delivery.

Element Explanation
payloadPublication Element contains the actual delivery of data
publicationTime Date and time the payloadPublication was created
publicationCreator Party that composes the publication
country Land of the composing party
nationalIdentifier Identification composing party
measurementSiteTableReference Reference to the measurementSiteTable
headerInformation Gives status and confidentiality information
> confidentiality Confidentiality of the information provided
> informationStatus Status of the information supplied
measurementSiteTable Unique identification of the measurementSiteTable

The measurementSiteRecord element

The measurementSiteTable consists of measurementSiteRecords. The actual measurement configurations and locations can be found here. We start with the configuration section of the measurementSiteRecord.

<measurementSiteRecord id="VID01_VID005413" version="25">
   <measurementSiteRecordVersionTime>2017-07-15T11:52:00Z</measurementSiteRecordVersionTime>
   <computationMethod>movingAverageOfSamples</computationMethod>
   <measurementEquipmentTypeUsed>
       <values>
           <value lang="nl">bluetooth</value>
       </values>
   </measurementEquipmentTypeUsed>
   <measurementSiteName>
       <values>
           <value lang="nl">ndw162 - A73: Grubbenvorst</value>
       </values>
   </measurementSiteName>
   <measurementSiteNumberOfLanes>1</measurementSiteNumberOfLanes>
   <measurementSpecificCharacteristics index="1">
       <measurementSpecificCharacteristics>
           <accuracy>95</accuracy>
           <period>60</period>
           <specificLane>allLanesCompleteCarriageway</specificLane>
           <specificMeasurementValueType>travelTimeInformation</specificMeasurementValueType>
           <specificVehicleCharacteristics>
               <vehicleType>anyVehicle</vehicleType>
           </specificVehicleCharacteristics>
       </measurementSpecificCharacteristics>
   </measurementSpecificCharacteristics>
   ..
 </measurementSiteRecord>
Element Explanation
measurementSiteRecord The element contains an exact description of one measurement location.
measurementSiteRecordVersionTime Date and time the record received an update
computationMethod De standaard rekenmethode die gebruikt wordt voor de waardes
measurementEquipmentReference The standard calculation method used for the values
measurementEquipmentTypeUsed Type of equipment used at measurement location
measurementSiteName The name (possibly in several languages) for the measurement location
measurementSiteNumberOfLanes The total number of lanes on which the measurement location provides values
measurementSide Driving direction of the traffic for which the measurement location provides data
measurementSiteRecordExtended Expansion measurement location properties for queue information
measurementSpecificCharacteristics Describes a measurement point data type vehicle category trio
accuracy Accuracy of measurement points in percentages
period This is the duration of the measurement period in seconds
specificLane Specifies the lane for the location
specificMeasurementValueType The type of measurement that is performed at the measurement location
specificVehicleCharacteristics Describes vehicles to which the measured value relates
vehicleType The type of vehicle
lengthCharacteristic Lower and/or upper limit of a vehicle category
comparisonOperator Used operator in the vehicle length comparison
vehicleLength length of the vehicle in meters
measurementSpecificCharacteristicsExtended queue characteristics
MeasurementForecastTimeCharacteristic Here the time is indicated until the start of the prognosis interval
timeToForecastPeriodStart Number of seconds from the start of the measurement period to the start of the prediction period
QueueCharacteristics Here queue characteristics are displayed
queueType Queue type
queueDetectionMethod Method of determining the length of the queue
MeasurementSiteCharacteristicsForIntersectionData Provides information about the traffic flow characteristics of the relevant queue index
trafficLightSignalGroup Signal group (s) within the traffic light constellation to which the information relates
specificLaneComposition Lane to which the defined measurement data relates
trafficSortingCharacteristics Pre-sorting Purpose of the lane (s) to which the queue relates

The measurementSiteLocation element (type ItineraryByIndexedLocations)

The Dutch DATEX II profile prescribes that for measurement locations where traffic flow and/or speed is measured, always is a derivative of the type point. Measuring locations where travel times are measured are always of type ItineraryByIndexedLocations.

The example below is of type ItineraryByIndexedLocations. An overview of the possible elements of this xsi: type of the measurementSiteLocation element is shown below the example.

Code voorbeeld van het type ItineraryByIndexedLocations.

Element Explanation
measurementSiteLocation Description of the exact location of the measurement location
locationContainedInItinerary Ordered list of locations that together describe the measurement area with index start value
location Describes the measurement area associated with the index
locationForDisplay Describes coordinates that can best be used to present on a map
latitude Latitude in decimals according to the WGS84 system
longitude Longitude in decimals according to the WGS84 system
linearExtension Contains coding measurement site based on OpenLR and start and end coordinates of measurement site
openlrExtendedLinear Contains coding measurement site based on OpenLR standard
linearByCoordinatesExtension Start and end coordinates of the described part of the measurement site
linearCoordinatesStartPoint Describes the starting coordinates of the relevant part of the measurement site
linearCoordinatesEndPoint Describes the final coordinates of the relevant part of the measurement site
supplementaryPositionalDescription Describes additional location information from measurement locations
affectedCarriagewayAndLanes Describes the lane or lane that the measurement location relates to
carriageway Provides information about the specific job to which the measurement location relates
lengthAffected Information about the length of the relevant part of the measurement site
alertCLinear Defines the location of the part of the measurement site on the basis of the VILD location table

The measurementSiteLocation element (type point)

The possible elements of the xsi: type point of the measurementSiteLocation element are shown below.

Element Explanation
measurementSiteLocation Description of the exact location of the measurement location
locationForDisplay Describes coordinates that can best be used to present on a map
latitude Latitude in decimals according to the WGS84 system
longitude Longitude in decimals according to the WGS84 system
supplementaryPositionalDescription Describes additional location information from measurement locations
affectedCarriagewayAndLanes Describes the lane or lane that the measurement location relates to
carriageway Provides information about the specific job to which the measurement location relates
alertCPoint Defines the location using the VILD location table
pointExtension (hoofdelement) Extension to include OpenLR location reference
pointExtension (subelement) Extension to include OpenLR location reference
openlrExtendedPoint Point location in OpenLR