### ARE THE GEOGRAPHICAL COORDINATES IMPORTANT? PUBLISHED

Andreea STULEANEC, Lavinia POPESCU, Roxana ȘELARIU, Mihai Valentin Herbei None mihai_herbei@yahoo.com
This paper presents how to visualize and how to transform geographic coordinates used in everyday life for various purposes that require precision and accurate localization. Geographic coordinates are based on latitude and longitude. Latitude and longitude make it possible to precisely locate any point on the Earth's surface. The equator is the imaginary circle on the Earth's surface, formed by its intersection with a plane passing through its center and perpendicular to its axis of rotation (the axis connecting the North Pole to the South Pole). The meridian is the circular arc (semicircle) on the surface of the Earth that connects the North Pole with the South Pole, the semicircle determined by the intersection of the Earth with a plane containing its axis of rotation. Meridian 0 or Meridian Origin is the semicircle joining the North Pole with the South Pole passing through the Royal Observatory location in Greenwich, London, UK. The position of Meridian 0 was adopted in 1884 at the International Meridian Conference, held in the United States. Correct transmission and precise interpretation of the position of a location based on geographic coordinates is very important, even vital in certain situations. The geographic position of a point, based on geographic coordinates, can be rendered in 3 distinct ways, depending on Latitude and Longitude 1. Decimal Degree – DD (ro.: Grade Zecimale - GZ): 44,42750; 26,10278 2. DEGREE DECIMAL MINUTE - DDM (ro.:Grade Zecimale Minute - GZM): 440 25.650 N; 260 06.167 E 3. Degree Minute Second - DMS (ro.: Grade Minute Secunde - GMS): 44025’39’’N, 260 06’10’’E Thus, the transformation of geographical coordinates is of particular importance in practice, because these very commonly used coordinates can be written in various forms, and GNSS tools and specialized software records and displays these coordinates according to the user's settings (DD or DDM or DMS). That is why it is very important to know these types of geographic coordinates and to transform them among them.
DD, DDM, DMS, geographic coordinates, transformation
Sustainable Development, Environmental Engineering and Geomatics
Presentation: oral