You would be in the Gulf of Guinea, hopefully in a boat, aboat 385 miles south
off the coast of Accra, Ghana. Tourists sail there and take each others' pictures
there, just to say that they've been to the Earth's "zero point". That's nonsense,
of course, because the whole system of latitude and longitude was invented by
people, and the 'zero point' could easily have been somewhere else. The only
points on Earth that are intrinsically unique are the north and south poles.
180° north longitude
26 degrees latitude and 430 degrees longitude do not exist on Earth's surface as the latitude ranges from -90 to 90 degrees and the longitude ranges from -180 to 180 degrees. If you meant 26 degrees S latitude and 130 degrees E longitude from Australia, it would be in the Indian Ocean southwest of Australia.
Australia
The latitude and longitude for 46 degrees North latitude from the Prime Meridian are approximately 46 degrees North latitude, 0 degrees longitude. Moving to 21 degrees South, 35 degrees West would take you to approximately 21 degrees South latitude, 35 degrees West longitude. Continuing to 20 degrees South, 45 degrees West would position you at approximately 20 degrees South latitude, 45 degrees West longitude. Finally, moving to 20 degrees North would bring you around 20 degrees North latitude, along the same longitude as the previous location (45 degrees West).
20000
At 80°S and almost ANY longitude, you would be standing on Antarctic ice.
180° north longitude
26 degrees latitude and 430 degrees longitude do not exist on Earth's surface as the latitude ranges from -90 to 90 degrees and the longitude ranges from -180 to 180 degrees. If you meant 26 degrees S latitude and 130 degrees E longitude from Australia, it would be in the Indian Ocean southwest of Australia.
The prime Meridian is 0 degrees longitude.
The longitude of the State of Missouri is 89 degrees 6'W to 95 degrees 42'W. The Latitude is 36 degrees N to 40 degrees 42'W. The longitude and Latitude of the Missouri River would depend on what location you are researching.
Australia
The latitude and longitude for 46 degrees North latitude from the Prime Meridian are approximately 46 degrees North latitude, 0 degrees longitude. Moving to 21 degrees South, 35 degrees West would take you to approximately 21 degrees South latitude, 35 degrees West longitude. Continuing to 20 degrees South, 45 degrees West would position you at approximately 20 degrees South latitude, 45 degrees West longitude. Finally, moving to 20 degrees North would bring you around 20 degrees North latitude, along the same longitude as the previous location (45 degrees West).
That would be Greenwich.
20000
Since you did not specify the directions of the latitude and longitude lines, the best assumption would be 15 degrees north latitude and 100 degrees east longitude. However, there is no capital city located there, and none at the other combinations. It is actually Chainat province in Thailand.
The longitude and latitude coordinates for a location at 175°E and 41°S would be 175° longitude and 41° latitude. These coordinates specify a point on the Earth's surface at 41 degrees south latitude and 175 degrees east longitude.
In the middle of the Pacific