Coordinate Converter
Convert between Decimal Degrees (DD) and DMS coordinates.
십진도 (Decimal Degrees) 입력
Overview
Convert between Decimal Degrees (DD) and Degrees-Minutes-Seconds (DMS) coordinate formats bidirectionally. Useful for GPS data processing, surveying, map API integration, and academic coordinate notation.
Formula
DD to DMS: Degrees(D) = integer part, Minutes(M) = integer part of (decimal × 60), Seconds(S) = remainder × 60. Example: 37.5665° → 37° 33' 59.40". DMS to DD: DD = D + M/60 + S/3600. Apply negative sign for South latitude (S) or West longitude (W). Example: 37° 33' 59.40" N → 37.5665°.
How to Use
- 1Select conversion direction (DD→DMS or DMS→DD).
- 2For DD conversion: enter latitude and longitude as decimal numbers (e.g., 37.5665).
- 3For DMS conversion: enter degrees, minutes, seconds, and direction (N/S, E/W).
- 4Results are displayed automatically. Copy them for your use.
Tips
- ✔Google Maps uses DD format; aviation and maritime sectors primarily use DMS.
- ✔Make sure to correctly specify N/S for latitude and E/W for longitude.
- ✔In DD, positive values mean North/East; negative values mean South/West.
- ✔Including decimal places in seconds provides more precise conversion.
- ✔Most programming languages and databases work better with DD format.
FAQ
Q. What is the difference between DD and DMS?
DD (Decimal Degrees) represents coordinates as decimals like 37.5665°, while DMS (Degrees-Minutes-Seconds) uses the format 37° 33' 59.4". DD is preferred for computation and programming; DMS is more common in maps and navigation.
Q. Which format should I use for storing GPS coordinates?
DD (Decimal Degrees) is recommended for databases and programming because it simplifies calculations. DMS is more intuitive for display purposes. Most map APIs (Google Maps, Mapbox) use DD format.
Q. How precise is the conversion?
6 decimal places in DD provide approximately 11 cm precision. 2 decimal places in DMS seconds provide about 30 cm precision. For general location purposes, 4 decimal places in DD (about 11 m) is sufficient.
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