🗺️ Geodesy & Global Navigation
GPS Coordinate ($\text{DD} \leftrightarrow \text{DMS} \leftrightarrow \text{DDM}$) Converter
Convert global latitude & longitude between Decimal Degrees ($\text{DD}$), Degrees Minutes Seconds ($\text{DMS}$), and Degrees Decimal Minutes ($\text{DDM}$).
🕰️ Greenwich Meridian (51.4769, -0.0005)
🗼 Eiffel Tower (48.8584, 2.2945)
🏙️ Empire State Bldg (40.7484, -73.9857)
🎭 Sydney Opera House (-33.8568, 151.2153)
🗼 Tokyo Tower (35.6586, 139.7454)
Decimal Degrees (DD)
Positive (+) = North (N), Negative (-) = South (S)
Positive (+) = East (E), Negative (-) = West (W)
Degrees Minutes Seconds (DMS)
51° 28' 36.84" N, 0° 0' 1.80" W
Standard DD:
51.476900, -0.000500
DMS Format:
51° 28' 36.84" N, 0° 0' 1.80" W
DDM (GPS NMEA):
51° 28.6140' N, 0° 0.0300' W
UTM Approx Zone:
Zone 30U
💡 DMS Conversion Formula:
$$\text{DD} = D + \frac{M}{60} + \frac{S}{3600} \implies 51^\circ + \frac{28}{60} + \frac{36.84}{3600} = 51.4769^\circ$$
Understanding GPS Geographic Coordinate Formats
Geographic positions on Earth's ellipsoid (WGS 84 datum) are expressed in three primary notation formats:
- Decimal Degrees (DD): e.g., `51.4769, -0.0005`. Widely used in web mapping APIs, GIS software, and smartphone databases.
- Degrees Minutes Seconds (DMS): e.g., `51° 28' 36.84" N, 0° 0' 1.80" W`. Traditional navigation and cartographic format ($1^\circ = 60', 1' = 60''$).
- Degrees Decimal Minutes (DDM): e.g., `51° 28.6140' N, 0° 0.0300' W`. Universal standard for marine maritime GPS and aviation NMEA 0183 sentences.