Southern Latitude
South Latitude
noun
South latitude is south latitude or southern latitude.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
理論上は、南緯45度が南極点から赤道までの距離の中間地点であるとされる。
Theoretically, 45 degrees south is considered to be middle point between the South Pole and the equator.