We've defined an absolute scale for each colour on the map, so that if you see an area with a particular colour, you know what kind of signal to expect. A dbm scale (units of signal strength) for mobile signal typically ranges from -113 to -51. For the new maps, we've defined < -99dBm as poor signal (solid red) - this covers your 1-bar and 2-bar situations. We've defined > -85dBm as good signal (dark green). Then, to fill in the -99dBm < and < -85dBm interval, we have a red to green gradient.
Articles in this section
- What data contributes to the maps?
- Why cannot I see my operator in your maps?
- When do you start showing coverage maps for an operator?
- How does the zoom on your maps work?
- What are the thresholds of the different colours in your maps?
- Why does the color of the coverage markers change as I zoom in?
- Why do I not see coverage markers in areas where I know there is coverage on the maps?
- You've made the maps red and green - how will people with colour blindness see them?
- Can someone find out my location by looking on the map?