Survey Settings
The Survey Settings control how positions are captured, processed, and displayed. This includes GPS source configuration, accuracy filtering, height corrections, position averaging, and data collection methods.
- Android
- iOS
Go to Settings > Survey Settings to access these options.
Export GPS information
Default: Off
When enabled, detailed GNSS quality metadata is included when exporting point layers. The exported data will contain additional fields such as HDOP, VDOP, PDOP, HRMS, and VRMS for each point.
This is useful when you need to document the quality of each surveyed position for post-processing or compliance reporting.
Export full picture paths
Default: Off
Controls whether attached photo file paths are exported as absolute paths or relative paths.
- On - exports the full file system path to each attached picture.
- Off - exports relative paths only.
Enable this if your post-processing workflow needs to locate the original image files on the device.
Orthometric height (MSL)
Orthometric height correction requires a Mapit Pro subscription.
Default: Off
Converts GPS ellipsoidal height to orthometric (mean sea level) height using the formula:
Orthometric height = Ellipsoidal height - Geoid height
GPS receivers report height above the WGS84 ellipsoid, which can differ from the actual height above sea level by tens of metres depending on your location. Enabling this setting applies a geoid model correction to give you a more meaningful altitude value.
When enabled, the Geoid Model selector appears below.
Geoid model
Default: Embedded
Select which geoid model to use for the orthometric height correction. The embedded model provides a global approximation. Country-specific models offer higher accuracy within their coverage area.
| Model | Coverage | Notes |
|---|---|---|
| Embedded | Global | Built-in, no download needed |
| EGM2008 2.5x2.5" | Global | High-resolution global model |
| RAF09 / RAF18 | France | IGN French geoid models |
| CHGEO04 | Switzerland | Swiss geoid model |
| 12B (g2012bu0) | USA | NOAA/NGS model |
| HT2 | Canada | NRCan Canadian model |
| OSGM15_GBR | United Kingdom | Ordnance Survey model |
| GEOIDSLO | Slovenia | Slovenian geoid |
| PlGeo11 / PL_EVRF2007_NH | Poland | Polish geoid models |
| PT08 | Portugal | Portuguese geoid |
| DVRM05 | Slovakia | Slovak geoid |
| External software | - | Use geoid from external GNSS app |
Country-specific models are downloaded automatically when selected. Files are stored locally and only need to be downloaded once.
GPS antenna height
Antenna height correction requires a Mapit Pro subscription.
Default: 1.30 m
Enter the height of your GPS antenna above the ground in metres. This value is subtracted from the measured height to give you the ground-level elevation.
When using a survey pole, set this to the pole height. When holding the device in your hand, a typical value is around 1.30 m. Set to 0 if your receiver is at ground level.
Accuracy and GPS quality on the map
Default: Off
Displays real-time GNSS quality information directly on the map screen. When enabled, you can see accuracy values, fix type, and satellite information while surveying without opening a separate panel.
Show speed and altitude
Default: Off
Displays your current speed and altitude on the map screen. Useful during GPS tracking or navigation to monitor movement in real time.
Remember last feature
Last added as default
Default: Off
When enabled, new features are pre-filled with the attribute values from the last feature you added. This saves time when collecting many similar features in sequence - for example, surveying a row of identical poles or trees.
Keep default field values
Default: Off | Visible when: Last added as default is on
When enabled, field default values defined in the attribute schema take priority over values from the last added feature. This is useful when some fields should always reset to a standard value while others carry over from the previous feature.
Position accuracy
Minimum accuracy
Minimum accuracy filtering requires a Mapit Pro subscription.
Default: Off
When enabled, positions that do not meet the accuracy threshold are rejected. Only GPS readings with accuracy better than the specified value are accepted for point collection.
Minimum accuracy unit
Choose between metres and centimetres for the accuracy threshold.
Minimum accuracy threshold
Range: 0 - 150 (in selected unit) | Default: 150
Set the maximum acceptable accuracy value. Positions with worse accuracy than this threshold are ignored. For example, setting 2 metres means only positions with accuracy of 2 m or better are used.
Position averaging
Position averaging requires a Mapit Pro subscription.
Default: Off
When enabled, multiple GPS readings are collected and averaged into a single position for better accuracy. Instead of using a single GPS fix, the app takes several readings and computes the mean position.
Averaging positions
Range: 2 - 100 | Default: 2
Set the number of GPS samples to collect for each averaged point. Higher values give better accuracy but take longer. A value of 10-20 is a good balance for most fieldwork.
Distance and bearing method
Distance and bearing requires a Mapit Pro subscription.
Default: Off
Enables an alternative point collection method where you specify a distance and bearing from a reference position (current GPS location, a base point, or the map cursor) to place a new point. This is useful when the target point is not directly accessible with GPS.
Bluetooth rangefinder
Default: Off | Visible when: Distance and bearing is on
Pairs a Bluetooth laser rangefinder with the app to automatically capture distance measurements. When enabled, you are prompted to select a paired Bluetooth device. The rangefinder provides the distance, and you provide the bearing to calculate the target point position.
Show base points on map
Default: Off
Displays reference base points as a layer on the map. Base points serve as known reference locations for distance and bearing calculations.
Show base points in layers management
Default: Off
Includes the base points layer in the layer management panel, allowing you to control its visibility and styling like any other layer.
Export range finder measurement details
Default: Off
Includes the raw distance and bearing measurements from the rangefinder in exported data. Useful for quality assurance and post-processing verification.
Accuracy as HRMS
HRMS accuracy display requires a Mapit Pro subscription.
Set accuracy as HRMS
Default: Off
When enabled, accuracy is reported as Horizontal Root Mean Square (HRMS) instead of the standard Android accuracy value. HRMS is a common accuracy metric used in professional surveying.
HRMS multiplier
Default: 1.00 | Visible when: Set accuracy as HRMS is on
A multiplication factor applied to the HRMS value. Common values:
- 1.00 - 1-sigma (68% confidence circle)
- 1.96 - 95% confidence circle
- 2.00 - approximate 95% confidence
- 2.45 - 2DRMS (95-98% confidence)
Go to Settings > Survey to access these options.
GPS source
Select which GNSS provider to use for positioning.
| Source | Description | Subscription |
|---|---|---|
| Internal GPS | Device built-in GNSS receiver | Free |
| TCP/IP NMEA | Network-connected receiver via TCP stream | Pro |
| Bluetooth Classic | MFI-certified receivers (e.g. EOS Arrow) | Pro |
| Bluetooth BLE | BLE receivers (e.g. u-blox, Emlid) | Pro |
Auto-start
Default: Off
When enabled, the selected GPS source starts automatically when the app launches. For the internal GPS this means location tracking begins immediately. For external sources, it attempts to connect to the last used device or address.
Connection status
A read-only indicator showing the current state of the GPS connection:
- Disconnected (grey) - no active connection
- Connecting (orange) - connection in progress
- Connected (green) - receiving position data
- Error (red) - connection failed
Fix quality
Displayed only when connected and receiving position data. Shows the current GNSS fix type:
| Fix type | Typical accuracy |
|---|---|
| No Fix | No position available |
| GPS | 3 - 5 m |
| DGPS | 0.5 - 2 m |
| PPS | < 1 m |
| RTK Fixed | 1 - 2 cm |
| RTK Float | 10 - 50 cm |
| Estimated | Varies |
| Manual | User-defined |
| Simulation | Simulated |
TCP/IP NMEA configuration
Visible only when TCP/IP NMEA is selected as the GPS source.
Host
Default: localhost
The hostname or IP address of the NMEA stream source. Enter the address of your GNSS receiver or correction service.
Port
Default: 5000
The TCP port number to connect to. Valid range is 0 - 65535.
Auto-reconnect
Default: On
Automatically reconnects to the TCP stream if the connection drops unexpectedly. The app retries after a 3-second delay.
Use the Connect / Disconnect button to manually control the connection.
Bluetooth Classic configuration
Visible only when Bluetooth Classic is selected as the GPS source. This is for MFI-certified GNSS receivers such as the EOS Arrow series.
Tap Select Device to choose from available Bluetooth Classic accessories. The selected device name and model are displayed. Use the Connect / Disconnect button to manage the connection.
Bluetooth BLE configuration
Visible only when Bluetooth BLE is selected as the GPS source. This is for Bluetooth Low Energy GNSS receivers that use the Nordic UART Service, such as u-blox and Emlid devices.
Tap Select Device to scan for and select a BLE GNSS receiver. Use the Connect / Disconnect button to manage the connection.
Accuracy threshold
Default: Off
When enabled, positions that do not meet the specified horizontal accuracy are rejected.
Accuracy threshold value
Default: 5.0 m (when enabled)
Enter the maximum acceptable horizontal accuracy in metres. Positions with worse accuracy are ignored during data collection. For example, setting 2.0 means only positions accurate to 2 metres or better are accepted.
Antenna height
Default: 0 m
The height of your GNSS antenna above the ground in metres. This value is subtracted from the measured altitude to give the ground-level elevation.
Set this to your survey pole height when using an external receiver on a pole. Set to 0 when the receiver is at ground level or when altitude correction is not needed.
Position averaging
Position averaging requires a Mapit Pro subscription.
Default: Off
When enabled, multiple GPS readings are collected and averaged to produce a more accurate position. Instead of recording a single fix, the app collects several samples and computes the mean.
Averaging count
Range: 2 - 100 | Default: 10
The number of position samples to average for each point. Higher values produce better accuracy but take longer to collect. A value of 10 - 20 is a good balance for most fieldwork.
GPS tracking intervals
Control how frequently positions are recorded during GPS tracking (automatic vertex recording along a route).
Time interval
Range: 0 - 60 seconds | Default: 2 s
The minimum time that must pass between automatic vertex recordings. Set to 0 to disable time-based filtering.
Distance interval
Range: 0 - 100 metres | Default: 2 m
The minimum distance you must travel before a new vertex is recorded. Set to 0 to disable distance-based filtering.
Both conditions must be met before a new vertex is added. For dense track recording, use low values for both. For sparse recording (e.g. driving), increase both to avoid excessive points.
Platform comparison
The survey settings are organised differently on each platform. Some features appear in different settings screens or are exclusive to one platform.
| Setting | Android | iOS |
|---|---|---|
| GPS source selection | External GNSS settings | Survey settings |
| Auto-start GPS | External GNSS settings | Survey settings |
| Connection status / Fix quality | External GNSS settings | Survey settings |
| TCP/IP configuration | External GNSS settings | Survey settings |
| Bluetooth Classic / BLE configuration | External GNSS settings | Survey settings |
| Accuracy threshold | Survey settings | Survey settings |
| Position averaging | Survey settings | Survey settings |
| Antenna height | Survey settings | Survey settings |
| Orthometric height / Geoid model | Survey settings | - |
| Accuracy & GPS quality on map | Survey settings | - |
| Show speed & altitude | Survey settings | - |
| Export GPS information | Survey settings | - |
| Export full picture paths | Survey settings | - |
| Remember last feature | Survey settings | Features settings |
| Distance & bearing method | Survey settings | Features settings |
| Accuracy as HRMS | Survey settings | - |
| GPS tracking intervals | Miscellaneous settings | Survey settings |