> ## Documentation Index > Fetch the complete documentation index at: https://qualcomm-3.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # GnssLocation Specifies the location information received by the client via `startPositionSession (uint32_t, const GnssReportCbs&, ResponseCb)` and `startPositionSession (uint32_t, LocReqEngineTypeMask, const EngineReportCbs&, ResponseCb)`. **Note** Unsupported fields for this release aren’t listed in the table. | **Field** | **Type** | **Description** | | :--------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | | `gnssInfoFlags` | [GnssLocationInfoFlagMask](https://docs.qualcomm.com/doc/80-80023-25/topic/GnssLocationInfoFlagMask.html#gnss-location-info-flagmask) | Specifies the validity of parameters. | | `altitudeMeanSeaLevel` | `FLOAT` | Altitude with respect to mean sea level, in meters. | | `pdop` | `FLOAT` | Position dilution of precision (PDOP). Ranges from 0 (highest accuracy) to 50 (lowest accuracy). | | `hdop` | `FLOAT` | Horizontal dilution of precision (HDOP). Ranges from 0 (highest accuracy) to 50 (lowest accuracy). | | `vdop` | `FLOAT` | Vertical dilution of precision (VDOP). Ranges from 0 (highest accuracy) to 50 (lowest accuracy). | | `gdop` | `FLOAT` | Geometric dilution of precision (GDOP). Ranges from 0 (highest accuracy) to 50 (lowest accuracy). | | `tdop` | `FLOAT` | Time dilution of precision (TDOP). Ranges from 0 (highest accuracy) to 50 (lowest accuracy). | | `magneticDeviation` | `FLOAT` | The difference between the bearing to true north and the bearing shown on a magnetic compass. The deviation is positive when the magnetic north is east of the true north. | | `horReliability` | [LocationReliability](https://docs.qualcomm.com/doc/80-80023-25/topic/LocationReliability.html#location-reliability) | Horizontal reliability. | | `verReliability` | `LocationReliability` | Vertical reliability. | | `horUncEllipseSemiMajor` | `FLOAT` | Horizontal elliptical accuracy semi-major axis, in meters. Uncertainty is defined with a 39% confidence level. | | `horUncEllipseSemiMinor` | `FLOAT` | Horizontal elliptical accuracy semi-minor axis, in meters. Uncertainty is defined with a 39% confidence level. | | `horUncEllipseOrientAzimuth` | `FLOAT` | Horizontal elliptical accuracy azimuth, in degrees. The range is \[0, 180]. Confidence for uncertainty isn’t specified. | | `northStdDeviation` | `FLOAT` | North standard deviation, in meters. Uncertainty is defined with a 68% confidence level. | | `eastStdDeviation` | `FLOAT` | East standard deviation, in meters. Uncertainty is defined with a 68% confidence level. | | `northVelocity` | `FLOAT` | North velocity, in meters/sec. | | `eastVelocity` | `FLOAT` | East velocity, in meters/sec. | | `upVelocity` | `FLOAT` | Up velocity, in meters/sec. | | `northVelocityStdDeviation` | `FLOAT` | North velocity uncertainty, in meters/sec. Uncertainty is defined with a 68% confidence level. | | `eastVelocityStdDeviation` | `FLOAT` | East velocity uncertainty, in meters/sec. Uncertainty is defined with a 68% confidence level. | | `upVelocityStdDeviation` | `FLOAT` | Up velocity uncertainty, in meters/sec. Uncertainty is defined with a 68% confidence level. | | `numSvUsedInPosition` | `UINT16` | Number of SVs used in position report. | | `svUsedInPosition` | [GnssLocationSvUsed InPosition](https://docs.qualcomm.com/doc/80-80023-25/topic/GnssLocationSvUsedInPosition.html#gnss-loc-sv-used-in-position) | GNSS SVs used in position data. | | `navSolutionMask` | [GnssLocationNavSolution Mask](https://docs.qualcomm.com/doc/80-80023-25/topic/GnssLocationNavSolutionMask.html#gnss-location-nav-solution-mask) | Navigation solutions that are used to calculate the position report. | | `posTechMask` | [LocationTechnologyMask](https://docs.qualcomm.com/doc/80-80023-25/topic/LocationTechnologyMask.html#location-technology-mask) | Position technology used in computing this fix. | | `gnssSystemTime` | [GnssSystemTime](https://docs.qualcomm.com/doc/80-80023-25/topic/GnssSystemTime.html#gnss-system-time) | GNSS system time when this position is calculated. | | `measUsageInfo` | std::vector \<[GnssMeasUsageInfo](https://docs.qualcomm.com/doc/80-80023-25/topic/GnssMeasUsageInfo.html#gnss-meas-usage-info)> | GNSS measurement usage information. | | `leapSeconds` | `UINT8` | The number of leap seconds at the time when this position is generated. | | `locOutputEngType` | [LocOutputEngineType](https://docs.qualcomm.com/doc/80-80023-25/topic/LocOutputEngineType.html#loc-output-engine-type) | Location engine type. When this field is set to `LOC_ENGINE_SRC_FUSED`, the fix is the propagated or aggregated reports from SPE. To check which location engine contributes to the fused output, check for `locOutputEngMask`. | | `locOutputEngMask` | [PositioningEngineMask](https://docs.qualcomm.com/doc/80-80023-25/topic/PositioningEngineMask.html#positioning-engine-mask) | When `locOutputEngType` is set to fused, this field indicates the set of engines that contribute to the fix. | | `altitudeAssumed` | `BOOL` | When this field is valid, it indicates whether altitude is assumed or calculated. | | `sessionStatus` | [LocSessionStatus](https://docs.qualcomm.com/doc/80-80023-25/topic/LocSessionStatus.html#loc-session-status) | Indicates whether the session is a success, failure, or intermediate. | | `dgnssStationId` | `std::vector ` | List of DGNSS station IDs providing corrections. Range: |