I'm not an expert in GIS. To my understanding
-180° longitude and
+180° longitude are the same, meaning that if I draw two vertical lines on the map along this longitude, they will overlap.
But does this work for latitudes, too? Is
-90° latitude equivalent to
+90° latitude? If that is the case, as the title says this would mean that
-90, -180 and
90, 180 are equivalent, is that correct?