Max Latitude and Longitude

Hello,
I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????
Thanks
N@poleon

"Napoleone" wrote in message
om...
Hello,
I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????
Thanks
N@poleon

90°0'0'' and 180°0'0''

If you still have a doubt, try to evaluate the sin(90°59'59'') on a
calculator, or using a computer language.

Henry wrote:

"Napoleone" wrote in message
om...

Hello,
I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????
Thanks
N@poleon


90°0'0'' and 180°0'0''

Napoleone wrote:

I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????

Spherical Coordinates
http://mathworld.wolfram.com/SphericalCoordinates.html

Sam Wormley wrote in message ...
Napoleone wrote:
I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????

Napoleone -

Are you referring to terresterial or earth-place latitude and
longitude, or astronomical latitude and longitude on the celestial
sphere?

On the astronomical celestial sphere, the maximum and minimum latitude
a

+90 degrees and -90 degrees, between the North Celestial Pole and the
South Celestial Pole, for a total span of 180°0'0", or 180.000 decimal
degrees - not 180°59'59" or nearly 181 degrees.

On the astronomical celestial sphere, the maximum and minimum
longitude a

+0 degrees and the same point - +360 degrees, in the degree system,
around the Celestial Equator starting and ending at the First Point in
Aires. As with all circles, its total angular span is exactly
360°0'0", or 360.000 decimal degrees - not nearly 360 degrees or
359°59'59".

In the astronomical coordinate system (unlike geographical coordinates
on the earth), longitude is most often expressed in units of time of
right ascension (RA), instead of degrees or decimal degrees. On the
geographical coordinate system, applicable to places on the surface of
the earth, longitude is expressed as degrees east and west of the
Greenwich, England prime meridian, e.g. 110 degrees West or 110
degrees East of that place.

An example of astronomical longitude, expressed in time units of
hours, minutes, seconds is "RA 12h 00m 00s." There are 24 hours in a
day and 360 degrees on the celestial equator. Therefore, 15 degrees
equals 1 hour of RA. "RA 12h 00m 00s" is the same as 180.000 ( 12 x
15 ) degrees of longitude. This can make chart reading more confusing
for beginners because one minute in the degree system (used for
astronomical latitude ) is not the same angular size as one minute of
right ascension.

On the geographic coordinate system used to locate places on the
earth, the maximum longitude is 180 degrees, either east or west, for
a total of 360 (2 x 180 ) degrees. The maximum latitude is + or - 90
degrees, for a total of 180 (2 x 90 ) degrees.

The earth has a circumference of about 24,902 miles or 40,076
kilometers. So there are about 62.2 miles ( 24,902 miles / 360
degrees ) in a rectangular degree on the earth's surface or 111.3
kilometers ( 40,076 / 360) in a rectangular degree on the earth's
surface.

On the astronomical celestial sphere, there is no equivalent measure
of distance like miles or kilometers on the earth's surface.
Everything is measured in angular degrees. There are a total of
64,800 (180 x 360) rectangular degrees on the Celestial Sphere. If
you hold your arm out and extend your index finger, the your index
finger's nail covers about one rectangular degree of the celestial
sphere in the night sky.

The internet-url reference provided by Sam goes into these topics in
more depth for astronomical latitude and longitude. Do an internet
search for "basic astronomy" and "celestial sphere" or "coordinate
system" or "hour angle", "right ascension" to read more web pages.

Do not confuse astronomical latitude and longitude with terresterial,
or earth-place, latitude and longitude. They are two different
systems to measure the position of stars in the sky and things on the
earth, respectively. Each system has a different "fundamental point"
from which all location of all other objects are located. In
astronomy, the fundamental point is called the First Point in Aires,
a place near a star in the night sky in the constellation Pisces. In
geography, the fundamental point is at intersection between the
Greenwich, England prime merdian and the earth's equator.

Hope this helps more than it confuses you.

- Kurt

Thanks to all.
However yesterday, after about an hour thinking about it I decided
that the max was 90.0.0 and 180.0.0.
Bye
N@poleon

(PrisNo6) wrote in message . com...
Sam Wormley wrote in message ...
Napoleone wrote:
I have a doubt. What is the max latitude and longitude???
In other words, the poles are at 90°59'59'' or 90°0'0''.
And for the longitude?? Is the maximum 180°59'59'' or 180°0'0''????

Napoleone -

I rereading your question, it seems the simplier answer is that you
are confusing the end point of a circle. Angular measurements are
made with respect to a circle. If you travel 360 degrees, you end up
at exactly the starting point - which is the same point at 0 degrees.
The same principle applies to your question about geographic
longitude. 180 degrees West longitude at the equator is exactly the
same point end point as 180 degrees East longitude.

Sorry for the longer explanation.

- Kurt

Corrections to prior post:

The earth has a circumference of about 24,902 miles or 40,076
kilometers. So there are about 62.2 miles ( 24,902 miles / 360
degrees ) in a rectangular degree on the earth's surface or 111.3
kilometers ( 40,076 / 360) in a rectangular degree on the earth's
surface.

This is true only at the equator. As latitude increases, the size of
rectangular degree decreases.

On the astronomical celestial sphere, there is no equivalent measure
of distance like miles or kilometers on the earth's surface.
Everything is measured in angular degrees. There are a total of
64,800 (180 x 360) rectangular degrees on the Celestial Sphere. If
you hold your arm out and extend your index finger, the your index
finger's nail covers about one rectangular degree of the celestial
sphere in the night sky.

This overstates the case per above. As latitude increases, the size
of rectangular degree decreases.