-
Draw: tap each corner of the area on a satellite map.
-
Walk: or go round it on foot and drop a corner where you stand.
-
Import: KML, GPX or GeoJSON, from Google Earth, a handheld GPS or farm software.
Then Track, and the phone tells you whether you are in, out, or on the edge.
Corners0
Area–
Edge–
GPS–
Last fix–
Tap the map to drop the first corner, or walk them out on foot
Waiting
––m
looking for satellites
Border width
1102030
How far either side of the boundary line counts as on the border. Phone GPS is usually good to 3–8 m, so under about 4 m the answer flickers.
Hear the warnings
Try each one now, at the volume you will work at.
This phone cannot vibrate from a web page (iPhones never can), so you get color and sound only. Keep the volume up.
Position quality
–
With no satellite lock, a phone guesses from wifi and masts and still calls it a position. If nothing better arrives for 15 seconds, the app shows what it has and says how rough it is.
Poor positions everywhere? On Android, give the browser precise location: Settings, Apps, your browser, Permissions, Location. Chrome blends GPS with wifi, cell and motion sensors; Firefox reads raw GPS and wanders more. Track in Chrome where you can.
Your areas
–
Browser storage is no place for the only copy of anything. A backup is one file holding every area, and any browser, phone or computer can read it back.
Offline maps
–
Areas and tracking need no signal. The map picture does, unless you save it first with Save map while drawing.
What stays on this phone, what the map providers receive, and your rights: Privacy.