Longitude, latitude and degrees, minutes and seconds.

1. This tool can convert decimal longitude and latitude values to degrees, minutes, and seconds, and vice versa.

2. Decimal: In the decimal notation, longitude and latitude are expressed as decimal numbers. For example, longitude 116.456 and latitude 39.542. This notation is direct and unambiguous, and is commonly used in computers and Geographic Information Systems (GIS).

3. Degrees, Minutes, and Seconds: Commonly used on maps, the degrees, minutes, and seconds notation divides latitude and longitude into three parts: degrees (°), minutes ('), and seconds (“). For example, longitude 116°27’21”, latitude 39°32’31”.

4. Note: These results are for reference only; please refer to specialized equipment for accurate measurements.