how do i determine two opposing co-ordinates? (long/lat)?

Question

I want to "talk" to someone on the diametrically opposed location to my location. I.e., someone on the other "side" of the planet. But I must first learn where that other location is. I know where I am at, I just need to know where "they" are.

Answer 1

The grid consists of imaginary lines called latitude and longitude. Latitude is a series of concentric circles running parallel to the equator and extending to both poles. Longitude is a series of meridians, or longitudinal lines drawn between the poles at regular intervals that pass perpendicularly through the equator. Where a particular latitude crosses a particular longitude, a pair of numbers, or coordinates, can be assigned. Every point on the Earth has a set of coordinates that indicate its position relative to every other point.
Latitude is measured from zero at the equator to 90 degrees north and south at the poles. Longitude is measured from zero to 180 degrees west and east. The reference lines for counting are the equator, for latitude, and a line drawn through Greenwich in England, the prime meridian, for longitude. These are the zero lines. A degree of latitude is equivalent to about 112 kilometers (70 miles). Longitudinal lines converge toward the poles, meaning that degrees of longitude vary according to the position on the Earth. At the equator, one degree of longitude is the same length as one degree of latitude, and at the north and south poles, the distance between degrees of longitude is zero.

Degrees are divided into 60 minutes, and each minute is divided into 60 seconds. For example, the Eiffel Tower in Paris has the following coordinates: latitude 48° 51' 32" north and 2° 17' 35" east. Sometimes, coordinates are expressed in decimal minutes instead of minutes and seconds, so the coordinates of the Eiffel Tower can also be written as 48° 51.5333 north latitude and 2° 17.5833 east longitude.

Most official maps indicate latitude and longitude, so viewers know exactly what part of the Earth the map represents.

Answer 2

Latitude (ladder style) is across the equator so 10 degrees north is opposite 10 degrees south. Easy.
Longitude is a bit harder because the 0 line is arbitrary and people, especially in the U.S., do not have much experience with E and W. Further, the opposite side of the earth requires moving 180 degrees so you need to think of subtracting like you do degrees across the zero point of temperature.
In this case, take the Longitude 92.5W. If we subtract 180 we get -87.5W or 87.5E. Similarly, if we take 6.3E and subtract 180 we get 173.7W which is probably in the water as it is near the international date line in the Pacific.

Answer 3

the 1st element you may desire to do is to devise the factors so as which you get a image of what's going on. If ABCD is a parallelogram then opposite facets are parallel for this reason the gradients of opposite facets would be equivalent. We call the shapes going around the form for this reason AB would be parallel to DC and BC would be parallel to advert. The gradient of A B is given by A (one million, 3) B(2, 4) m = (y2 -y1)/ (x2 - x1) = (4 - 3) / (2 -one million) = one million /one million =one million Now the line CD might have a similar gradient and comprise the ingredient D (5, -one million) Use the formulation y - y1 = m(x - x1) y - - one million= one million (x - 5) y + one million = x - 5 y - x = -6 Now evaluate advert A (one million, 3) D ( 5 , -one million) m= (y2 -y1)/ (x2 - x1) =( -one million - 3 ) / (5 - one million) = -4/ 4 = -one million the line BC has this gradient and incorporates the ingredient B (2, 4) y - y1 = m(x - x1) y - 4 = -one million(x -2) y - 4 = -x +2 y + x = 6 we've the equations of BC and CD. the ingredient of intersection of those 2 stands out as the ingredient C, so resolve those 2 equations concurrently. y + x = 6 y - x = -6 If we upload those equations we get 2y = 0 y = 0 It follows that x = 6 So the co-ordinates of ingredient C are ( 6, 0) As a examine plot those factors and notice in case you get a parallelogram. (You get a rectangle!) desire it fairly is clever.

Answer 4

Here's the quick way to find your opposite ... you need to know the latitude and longitude of your location:

Their latitude: Change the direction on yours from north to south, or vice versa.

Their longitude: Subtract the number of degrees in your longitude from 180, then change the direction from east to west, or vice versa.

Example: Start at Butte, Montana ... 46°N, 112.5°W.

Latitude of the "opposite" is 46°S.(change north to south)

Longitude of the opposite is 67.5°E (180 - 112.5 = 67.5, then change west to east)

Answer: 46°S, 67.5°E. There's nothing living there but fish, though ... that location is in the southern Indian Ocean.

Answer 5

Very simple. Remember the Latatuide rhymes with FLATitud which is east to west. and long. means long running north to south.