How To Calibrate The Compass On An iPhone
Your iPhone's compass is a feature you may not know about, but it can save your life. However, you'll need to calibrate it ...
BBC2 年
Map symbols, direction and contour lines
A four-point compass can give a rough direction whereas a sixteen-point compass is much more precise. Map symbols show what can be found in an area. Each feature of the landscape has a different ...
Princeton University2 年
OA Guide to Map & Compass
The red end of your compass needle is magnetized and wherever you are, the earth's magnetic field causes the needle to rotate until it lies in the same direction as the earth's magnetic field. This is ...
The Manual on MSN9 个月
Ditch the GPS: How to navigate using a map and compass
GPS devices and GPS apps for your phone and even navigation watches with GPX files are nearly foolproof today. But what about ...