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Thread: long lat ect

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    Default long lat ect

    can someone explain how the geo locations work, i forgot, long time since school

    eg. newcastle is 32° 55′ 0″ S, 151° 45′ 0″ E

    & port augusta is 32° 29′ 33″ S, 137° 45′ 57″ E

    reason is, by the map it looks like there are nearly the same longitude? but my brother argues that port augusta is way down lower than newcastle, true?
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    Your brother needs to look at a map.

    It's latitude where they look similar... longitude is the vertically running meridian lines, which are very different between Newcastle and Port Augusta.

    Port Augusta is actually a little higher (north) than Newcastle.

    The latitude figures you've quoted confirm that with both being 32°, but Newcastle being 55 minutes is further south than Port Augusta at 29 minutes.

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    yes i thought so looking at a map
    never realised just how far up SA comes
    now i know
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    Quote Originally Posted by Philquad View Post
    can someone explain how the geo locations work, i forgot, long time since school

    eg. newcastle is 32° 55′ 0″ S, 151° 45′ 0″ E

    & port augusta is 32° 29′ 33″ S, 137° 45′ 57″ E

    reason is, by the map it looks like there are nearly the same longitude? but my brother argues that port augusta is way down lower than newcastle, true?

    Let's refresh some Primary school geometry.
    A circle has 360 degrees. So does a sphere as you move around it in on any axis. This however causes some problems when we want to translate it to a 2D flat map.

    The first thing to consider is Longitude. Pretty simple, it's based on the equator. But rather than using 360 degrees around the equator starting from Greenwich Meridian. We instead use 180 degrees East and West.

    So Newcastle is about 151 degrees East of Greenwich. New York by comparison is 74 degrees West of Greenwich.

    Newcastle is 151 degrees 45 minutes 0 Seconds East which clearly puts it more further East than Port Augusta at ~137°

    ----

    Next is Latitude. Lines of Latitude run parallel to the equator, but a measured in angular degrees from it. 0° latitude is the equator and +90° is the north pole and -90° is the south pole. They can also be expressed as 90°N or 90°S.

    Newcastle at 32° 55′ 0″ South is further south then Port Augusta at 32° 29′ 33″ South.
    Newcastle is 25 minutes 27 seconds further south.

    The reason why Newcastle 'might' look further north on a map is just an optical illusion.
    The two are very close in latitude, but the angle of the approaching coastline distorts perception of where and how far each is from the southern most point.


    As a side note...
    New York is ~40° North making it about 72 degrees difference.
    Just for the flat earth idiots. If you take a photo of the full moon rising in Newcastle and then fly to New York and take another photo of it rising there, the moon's orientation in the photo will be rotated about 72 degrees relative to the horizon.
    Last edited by trash; 19-10-17 at 12:29 PM.
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    thanks trash
    i knew id be up your alley
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    There is a group I believe who want the global map shape changed because what we use today is misleading.

    I havent got it now but I had an Amateur Radio map that showed YOUR location as Zero like the North Pole and I was amazed to see the direction that both Melbourne and Perth were from me.
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

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    Quote Originally Posted by gordon_s1942 View Post
    I havent got it now but I had an Amateur Radio map that showed YOUR location as Zero like the North Pole and I was amazed to see the direction that both Melbourne and Perth were from me.
    Any GPS (straight line, not road map), or Google Earth can display that.

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    When I had that map, neither GPS nor Google Earth had been invented then nor was the Home Computer to use it on, at least not in MY home.....
    I stand unequivicably behind everything I say , I just dont ever remember saying it !!

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