MassGPS

LIVE POSITION

No GPS fix

Unknown

AccuracyN/A

Altitude (MSL)N/A

SpeedN/A

HeadingN/A

Location ageN/A

FilterRaw GPS

GPS confidenceUnavailable

Start tracking to calculate confidence.

GNSS diagnostics

SatellitesN/A

HDOPN/A

VDOPN/A

Fix qualityN/A

Altitude refN/A

Geoid sep.N/A

Browsers do not expose raw GNSS metadata. External NMEA/native providers can supply it later.

Trail

Stopped

No recorded trail.

Auto-save interval Keep awake

FIELD DATA

Saved locations

0

No saved locations yet.

Data exchange

DISTANCE & BEARING

Path measurement

Off

Enable the tool, press +, then tap the map. You can also choose saved/current points. Add two or more points for a path.

No measurement points.

Manual coordinate

POLYGON SURVEY

Area measurement

Off

Enable, press +, then tap the map to add each vertex. Drag vertex handles to refine the boundary; tap a vertex in the list to remove it.

No polygon vertices.

NAVIGATION

Compass

Unavailable

NESW

Heading N/A

Choose a saved location as a target.

No target selected.

ELEVATION ANALYSIS

Terrain profile

0 samples

StartNot set

EndNot set

Choose the start/end target below, press +, then tap the map. Saved/current-point actions remain available.

Sampling interval (m) Max samples Elevation provider Show samples

Provider configuration

OpenTopoData base URL Dataset

Coordinates are sent only when you explicitly generate a profile.

Select start and end points.

#	Distance	Coordinate	Elevation	Slope

FIELD AVAILABILITY

Offline maps

Restricted

Provider policy enforced

Public OSM and OpenTopoMap tiles cannot be bulk downloaded. Configure a custom/self-hosted source that explicitly permits offline caching.

Region name Min zoom Max zoom

No region selected.

Stored regions

No offline regions.

The app shell and your field data remain available offline. Tile regions require a permitted provider.

CONFIGURATION

Settings

Display & coordinates

Theme Coordinate format Decimal places Show raw coordinates

Location processing

Smoothing filter Battery mode Max accuracy (m) Max age (s) Min confidence Allow low-quality manual save Use online MSL elevation MSL API base URL MSL dataset

Custom tile provider

XYZ URL template Attribution Offline cache permission I own or have permission to bulk cache this source.

Storage

Calculating…

Private by design

Location data is stored on this device. Online MSL elevation sends the current coordinate to the configured elevation API.