What is DMS and How to Convert Latitude and Longitude to GPS Coordinates By Flatlong tool

Maria Taylor
2 min readOct 30, 2020

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What is DMS?

DMS is the abbreviation for Degrees Minutes Seconds. Degrees minutes seconds (DMS) are special type of units used for measuring angles, as an alternative to decimal way to stating the size of an angle. It is a known fact that there are 360 degrees in a whole circle, with 1/60th of those being 1 minute, and 1/60th of one minute being 1 second. DMS includes degrees (°), minutes (‘), seconds (‘’), with the corresponding symbols, and a size of any angle can be stated like.

For example, 10 degrees, 5 minutes, 30 seconds.

DMS Lat 16° 15' 0" N

DMS Long 61° 34' 59.999" W

The numerical values for latitude and longitude in decimal number format are:
° for degrees, ‘ for minutes and ‘’ for seconds.

The common abbreviations of the directions:

  • S: South
  • W: West
  • E: East
  • N: North
  • Z: Zone

What is UTM?

The Universal Transverse Mercator (UTM) is a system for assigning coordinates to locations on the surface of the Earth. As the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth as a perfect ellipsoid. However, it differs from global latitude/longitude in that it divides the earth into 60 zones and projects each to the plane as a basis for its coordinates. Specifying a location means specifying the zone and the x, y coordinate in that plane. The projection from spheroid to a UTM zone is some parameterization of the transverse Mercator projection. The parameters vary by nation or region or mapping system.

Most zones in UTM span 6 degrees of longitude, and each has a designated central meridian. The scale factor at the central meridian is specified to be 0.9996 of true scale for most UTM systems in use

  • Easting: the x coordinate
  • Northing: the y coordinate

What is CSS? CSS (celestial coordinate system) a system for mapping positions on the celestial sphere. In astronomy, a celestial coordinate system (or celestial reference system) is a system for specifying positions of satellites, planets, stars, galaxies, and other celestial objects relative to physical reference points available to a situated observer (e.g. the true horizon and north cardinal direction to an observer situated on the Earth’s surface). Coordinate systems can specify an object’s position in three-dimensional space or plot merely its direction on a celestial sphere if the object’s distance is unknown or trivial.

An example uses Flatlong tool to convert Latitude and Longitude :

Latitude 10.9440774

Longitude 106.85324969999999

DMS Lat 10° 56' 38.679" N

DMS Long 106° 51' 11.699" E

CSS Lat 10° 56' 38.679"

CSS Long 7h 7m 24.78s

UTM Easting 702,527.18

UTM Northing 1,210,418.06

UTM Zone 48P

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