Tap boundary corners in order, then Finish. Avoid crossing edges. Pan or pinch to navigate.
Areas & measurements
For new areas
- Area
- Perimeter
Tap an area to select and measure it. Tap empty map to deselect. Areas are saved in this browser; selection resets on reload.
No area selected · GPS & info
Requesting your location. The initial map view is not your location.
Blue = live device location; its circle shows reported accuracy. Purple = simulation: drag it to test.
Warnings start more than 5 m outside the selected area and clear on re-entry. Measurements and GPS are approximate. Poor accuracy can cause false warnings. This is not a safety guarantee or a background alarm.
Draw an area or select an existing one. Location requires permission.