[MLB-WIRELESS] New Node Coordinates?

[Ian Donaldson]

Nick,

There are a couple of ways of expressing co-ordinates, but they are 
variations on either degrees, minutes, seconds, or decimal notation. There 
are 60 minutes in each degree and 60 seconds in each minute, just like 
time.

When it is written degrees, minutes, seconds as below:

37 46' 03" S

It is actually saying that the co-ordinate is 37 degrees + 46/60 of a degree 
+ 3/60 of a minute (or 3/3600 of a degree).

So in decimal notation it is 37 + 0.766666.. + 0.000833333... or 37.7675 
degrees.

Just to be painful, sometimes people write co-ordinates as degrees, minutes, 
but seconds in decimal, e.g. 36 46.05' S.

Oh, and sometimes the "N E S W" comes before the co-ordinate rather than 
after.

Converting from a decimal back to degrees, minutes seconds is relatively 
straightforward, e.g. 37.7675, write "37" and subtract 37, leaving .7675. 
Multiply that by 60, giving 46.05. Write "46'" and subtract it, leaving 
0.05. Multiply that by 60, giving 3, which is your seconds '03"'.

Ian



On Wed, 28 Apr 2004 03:37 pm, Nick Sibbing wrote:
> Just added a new node for a mate in Kerry Rd Warranwood but something
> isn't quite right with the coordinates. Locfinder shows him to be 43 km
> from my place in Montrose (should be about 10-12)
>
> I found the block on Vic MAp ok and the coordinates in the status bar
> are
> 37 46' 03" S and 145 15' 42" E
>
> I checked another node in Warranwood BEA and they show Lat -37.7694 Long
> 145.2407
>
> so this looks good and my theory is that the lat/long is made up of the
> figures from the status bar  with a dot after the  forst 2 and the other
> 4 concatenated.
>
> Problem is most other nodes have a 7 digit figure rather than 6 and when
> I add the node it ends up in the middle of nowhere. I can't tell from
> the map but there aren't any roads and ther seem to be a few other
> confused nodes out there as well eg Box Hill and Scoresby nodes. At
> least I'm in Vic as it warns for non vic locations but its a bit lonely.
>
> So if anyone can shed any light on what my correct coordinates are that
> would be great and it might  help someone else to add it to the create
> node page.
>
> Regards Nick Sibbing
>
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-- 
Ian Donaldson, SA @ MI                       -- ian at myinternet.com.au


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