Lanarkshire Fed racing 2009

[Guest Gareth Rankin]

Motherwell to Eyemouth due East approx 76 miles good sprint race

 

Correct Fair Play, so how the hell does BigDa only get "quote" from west to east  there is only 45mile of land  and motherwell is  18mile inland :-/ :-/ :-/ :-/ :-/

 

Can you explain Bigda because i am at a lost as to were you get your measurements from.

 

 

[Guest bigda]

if you want to know whats on the same grid line,  line  up edinburgh   and you will find  Cardiff  are on the same grid line as like Inverness and Swansea   taking in lanarkshire in a grid around 34 degrees draw those two lines up  that will let you see how offset  we lie

[hotrod]

yes yor right about inverness and swansea  that is  due north to  duesouth and go 90 degrees from the perpendicular at motherwell on the line .and have a look numptie you will go due east/west and you WILL PASS THROUGH DUNS ON THE EAST AND LARGS ON THE WEST .

[hotrod]

where are you bigda are you away looking up perpendicular in the dictionary ?

[Guest Gareth Rankin]

if you want to know whats on the same grid line,  line  up edinburgh   and you will find  Cardiff  are on the same grid line as like Inverness and Swansea   taking in lanarkshire in a grid around 34 degrees draw those two lines up  that will let you see how offset  we lie

 

Bigda it is pretty much common knowledge that the uk lies nw to se, but is still 76 miles from Motherwell to the east coast and grangemouth is still North East of motherwell even allowing for the shape GB lies.

 

 

[Guest bigda]

so the tin head, now knows  yes  we fly south east  in all our races  didn't take you long after all ;D

[Guest bigda]

 

Bigda it is pretty much common knowledge that the uk lies nw to se, but is still 76 miles from Motherwell to the east coast and grangemouth is still North East of motherwell even allowing for the shape GB lies.

 

 

it lies  more east than north

[hotrod]

so the tin head, now knows  yes  we fly south east  in all our races  didn't take you long after all ;D

this was never about where we race our birds everyone knows our birds race from the s/east , this was about a nasty comment to uphallhen that he was a novice for saying he trained east 45 miles , thn you come away with east of lanarkshire was grangemouth so have you changed your opinion?

 

[hotrod]

 

it lies  more east than north

no your wrong again its north east simple as that.

 

 

[Guest Gareth Rankin]

Click on attachment to end this nonsense that has bee getting aired for 2 days now.

 

[hotrod]

Click on attachment to end this nonsense that has bee getting aired for 2 days now.

well done big man i wish i could work a computer like you , im one finger and on and off.

 

[Guest uphallhen]

THANKS HOTROD .bigda dose not know  s*** about pigeon racing   ;)

[Guest bigda]

you couldent tell  me  if your shoes where hurting  

[hotrod]

well bigda youve been proved wrong (completely wrong ) so are you going to apolagise  for calling me an idiot when i was CLEARLY RIGHT.

[Guest bigda]

well bigda youve been proved wrong (completely wrong ) so are you going to apolagise  for calling me an idiot when i was CLEARLY RIGHT.

 

hotrod  i will let you into a secret as your not a man of this world  but i suggest  you take all the time  in the world to work this out and come back in a few days  with   the answer and more knowledgeable than you are, as you have led a shelterd live  ;D ;D :X 8)

Magnetic Declination & Grid Convergence

 

Courtesy of GeoForschungsZentrum (Geo-Research Centre), Potsdam

 

It is generally believed that a compass-needle points towards the North Pole and that the vertical grid-lines on maps like Ordnance Survey maps do likewise. Sadly, while both these beliefs are approximately true, neither is exactly so. The discrepancies are very small (no more that a few degrees in either case), but they must be taken into account for accurate position-finding and navigation.

 

 

 

 

Magnetic declination

 

The Earth behaves as though there were a huge bar-magnet embedded deep in its core with the "north pole" somewhere under Antarctica and its "south pole" somewhere under the extreme north of Canada. Does that sound upside down? Well it isn't—if the "north poles" of two bar magnets are brought close together, they repel each other; the south pole of one magnet attracts the north pole of another. The north pole of a compass-needle points (approximately) towards the Earth's North Pole, so the Earth is behaving as though the imaginary magnet embedded in its core has its "south pole" in the Arctic and its "north pole" in the Antarctic.

 

The Earth's magnetic field has two "poles" where the direction of the field is vertical; the North Magnetic Pole is located in the extreme north of Canada and the South Magnetic Pole is in Antarctica. The positions of the magnetic poles are not fixed: the Magnetic North Pole is slowly drifting north-westwards across the Canadian Arctic; the most recent survey established its position in 2001 as Lat. 81.3°N, Long. 110.8°W and it is moving about 0.3−0.4° northwards and 0.9° westwards per year; its present position is estimated to be 82.7°N, 114.4°W. The South Magnetic Pole was found to be at Lat. 64.7°S, Long. 138.0°E in 2001. It's immediately obvious from these figures that the Earth's magnetic axis does not coincide with its axis of rotation; in fact, the angle between the rotational axis and the line joining the 2001 Magnetic Poles is almost 15°. But what's more surprising (although less obvious unless you happen to be very good at three-dimensional coordinate geometry) is that the magnetic axis does not even pass through the Earth's centre, but misses it by about 1300km (roughly 800 miles). Click here to see the maths.

 

Since the magnetic lines of force are directed towards the magnetic pole, that is the direction indicated by the needle of your compass (although the magnetic field is subject to distortions caused by local topology and is also affected by the magnetic field of the "solar wind"). The angle between the compass-needle and true north is called the magnetic declination, or magnetic variation. The magnetic declination varies from place to place, and also changes slowly with time. In locations where the needle of a compass points to the west (left) of true north the magnetic declination is negative; where the compass-needle points to the east (right) of true north the magnetic declination is positive.

 

 

 

For detailed information about the Earth's magnetism, please see the websites of the British Geological Survey or the NGDC (U.S. National Geophysical Data Center).

 

 

 

 

Grid convergence

 

The Ordnance Survey have a great deal of explanatory information on their website about their maps and the Transverse Mercator Projection they use. There is an interactive guide that explains the grid referencing system in very simple language and a two-sided A4 leaflet that they suggest you print and keep for handy reference, as well as an excellent online section about the National Grid map reference system on their GPS website. For the more technically-minded, an Ordnance Survey information booklet entitled A guide to coordinate systems in Great Britain is also available on their website.

 

The online National Grid map reference system pages include a diagram (on page 7) similar to the one below, showing the relationship between the graticule (i.e. the lattice of intersecting meridians of longitude and parallels of latitude) and the National Grid's lattice of vertical and horizontal grid-lines and it is immediately apparent from this that the only North-South grid-line that actually points to "true north" is the one that coincides with the longitude meridian 2°W, in the centre of the projection; all the other meridians of longitude converge towards the North Pole and "grid north" is west of true north in the west half of the projection and east of grid north in the east half of the projection. The angle between the North-South grid-line and true north at any point is called the convergence and this is described on page 18 of the online National Grid map reference system section; page 19 gives an approximate method of calculating it. Strangely, the much more technical A guide to coordinate systems in Great Britain doesn't mention convergence at all.

 

 

 

To summarise:

 

true north is the direction towards the North Pole,

magnetic north is the direction a compass-needle points to, and

grid north is the direction indicated by the vertical grid-lines on an Ordnance Survey map;

  

magnetic declination tells you the direction of magnetic north, measured from true north, and

convergence tells you the direction of grid north, measured from true north.

The magnetic declination and the convergence can both be positive or negative: positive values are east of true north and negative values are west of true north. The simplest case is where both are positive; this is shown diagrammatically in Figure 1:

 

 

Fig.1:Convergence and magnetic declination

 

We can see from this that the magnetic grid variation (the angle between magnetic north and grid north) is given by

 

magnetic grid variation  =  magnetic declination − convergence

 

In fact, the magnetic declination is negative (that is to say, magnetic north is west of true north) throughout the British Isles at the present time, but the National Grid convergence can be either negative or positive, as I have already explained. The situation to the west of the central meridian of the Ordnance Survey projection (longitude 2°W) is shown diagrammatically in Figure 2, and the situation to the east of the central meridian is shown in Figure 3:

 

  

Fig.2: In the western half of the O.S. projection, convergence and magnetic declination are both negative Fig.2: In the eastern half of the O.S. projection, convergence is positive and magnetic declination is negative

 

The relationship

 

 

magnetic grid variation  =  magnetic declination − convergence

 

still holds, though, provided the signs are handled correctly. For example, in the part of North London where I live, the magnetic declination is −2°25' and the convergence is +1°25': the magnetic grid variation here is therefore

 

(−2°25') − (+1°25')  =  âˆ’(2°25' + 1°25')  =  âˆ’3°50',

 

i.e. magnetic north is 3°50' west of grid north. On the other hand, at Penzance in the extreme south-west of Cornwall, the magnetic declination is −4°13' and the convergence is −2°43'; so the magnetic grid variation there is

 

(−4°13') − (−2°43')  =  âˆ’(4°13' − 2°43')  =  âˆ’1°30',

 

so that magnetic north is 1°30' west of grid north.

 

  Larry Simons

23rd May 2005  

 

[Fair Play]

It is just as well you didn't think that one out as there would have been a hellava noise rattling about inside :P

[Guest bigda]

It is just as well you didn't think that one out as there would have been a hellava noise rattling about inside :P

 

just as well your not in the masons, fairplay as you and degrees dont work :X ;D ;D :o

[JADE]

what was the original question???  lol

[Chris Little]

Click on attachment to end this nonsense that has bee getting aired for 2 days now.

 

Well done Gareth, there for all to see, Grangemouth is North East of Motherwell 8)

[Guest bigda]

there's another who aint officer material ;D ;D

[Chris Little]

Least I can read a map  ;D ;D ;D ;D ;D ;D 8) 8)

[Guest bigda]

Least I can read a map  ;D ;D ;D ;D ;D ;D 8) 8)

 

who good are you at reading threads ;D ;D

[alec guinness]

bigda big start for you on saturday kelso lanarkshire fed, how many are you sending? hows the training been going. :)no geography please.

[hotrod]

AYE YOUR RIGHT AND EVERYBODY ELSE IS WRONG , YOU ARE A COMPLETE AND UTTER CLOWN , you must have spent all night surfin the web to find that equation about true north and magnetic north and to be only 1 degree  of difference still proves you are a clown so go away back to your brain dead wee world .NUMPTIE.

[Guest bigda]

bigda big start for you on saturday kelso lanarkshire fed, how many are you sending? hows the training been going. :)no geography please.

 

not to bad training  but there wher afew saying today was a strange one  as birds as late as 3hrs from 15mile tosses dident go my self today but toss the day before  gilmerton 40 mile  no wind they done it in  55min-  last  home 1hr 10