MENU CONTACT 
   Redirecting... ...to our OLD website!


We're still in the process of converting the site to the new format.

Apologies for the inconvenience and thank you for your understanding.

-Matt, Admin

5

Ok - go now to OLD site

No thanks - stay on NEW site


BM Website Issues/Help Requests

biker match miles

biker match miles  - Forums [Biker Match] biker match miles  - Forums [Biker Match]
Home / Search Forums / BM Website Issues/Help Requests /

biker match miles

 Posts: 28       Pages: 1/2

Post Reply
from my house to vmaxdegs its 14 miles but from vmaxdegs to mine its 9 miles how do you work that one out ? is it something to do with the camber of the road ? or how many right turns at islands ? Actually we have both clocked it and it is 16 miles ............ which ever way you go. Has anyone else noticed a discrepancy ? or how do you lose 5 miles ? with the price pf petrol could be a useful tip.

   Update Reply
Kate5930 @ 01/10/2007 17:45  

Is this a trick question? Is it uphill to Deg's and downhill to yours?

   Update Reply
Sandi @ 01/10/2007 17:51  

islands! what islands,i didn't see any

   Update Reply
vmaxdeg @ 01/10/2007 17:57  

hmmmmm. Damn. Let me figure it out. But for info the distance is calculated in a straight line

   Update Reply
Matt @ 01/10/2007 18:09  

ROFLMHO @ Matt

   Update Reply
Sandi @ 01/10/2007 18:17  

You sure its saying that? I've checked the 2 postcodes you have, and they're pretty similar results (Allowing for a 10% error at either side due to the shape of the earth - makes it difficult to calculate). Here's my results for you.... The distance between these 2 postcodes is precisely 14.23317361 miles (To 8 decimal places).<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p> --------------------------------------------------------------------------------<o:p></o:p> The latitude distance between them is 13.26450232 miles (To 8 decimal places).<o:p></o:p> The longitude distance between them is 5.16102795 miles (To 8 decimal places).<o:p></o:p> Pythagorus theory (SquareRt of: X*X + Y*Y) is applied to find the distance...<o:p></o:p> SquareRt ( (5.2x5.2) + (13.3x13.3) ) = 14.23317361 miles.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> The distance in reverse between these 2 postcodes is precisely 14.69078673 miles (To 8 decimal places).<o:p></o:p> --------------------------------------------------------------------------------<o:p></o:p> The latitude distance between them is -13.26450232 miles (To 8 decimal places).<o:p></o:p> The longitude distance between them is -6.31444321 miles (To 8 decimal places).<o:p></o:p> Pythagorus theory (SquareRt of: X*X + Y*Y) is applied to find the distance...<o:p></o:p> SquareRt ( (-6.3x-6.3) + (-13.3x-13.3) ) = 14.69078673 miles.

   Update Reply
Matt @ 01/10/2007 18:23  

hmmmm longitude distance is quite well out, tho it doesnt affect the result so much. The longitude is difficult to calculate, because its different distances (per one unit of messurement) at each point of the earth (Oval shape)

   Update Reply
Matt @ 01/10/2007 18:27  

Aww bless Matt, you and your calculations, you're just a frustrated MATThematician aint ya

   Update Reply
Sandi @ 01/10/2007 18:30  

Check out how difficult it is just to calculate the earths radius... http://en.wikipedia.org/wiki/Earth_radius Nevermind calculate the distance between to units of messurement on that radius :-) Took me about 2 months writing the script that got within 1% accuracy. It's so complex that I wrote a full essay about it for college at the time.

   Update Reply
Matt @ 01/10/2007 18:31  

lol thx Kwak

   Update Reply
Matt @ 01/10/2007 18:31  

Basicly you're saying it 14 miles Matt? I've noticed that on some profiles,say for instance,someone from Birmingham,it could say that they are closer to me than someone from Cambridge is Its fairly simple really,we can all tell the mileage calculator doesnt work very well & thats not a fault of the sites,commonsense should tell people to question it. p.s I've seen another site with a far worse calculator,Paris from Cambridge 4 miles!!!!???? lol

   Update Reply
oggy @ 01/10/2007 18:34  

Sorry that sounds a bit blunt really Knackered

   Update Reply
oggy @ 01/10/2007 18:35  

hmmm, forget everything i just said (The results). My calculations may be wrong. Well, the calculations in my script are accurate (The methodolgy of calculating it) but the way I've implemented it is wrong. I've changed the value of a variable that I shouldn't have. Dammit.

   Update Reply
Matt @ 01/10/2007 18:38  

DAMN! It's the cosine thing. I work the longitude value out using the earth's radius. Simplified to cosinge(Postcode1's latitude value). BUT - its not accurate enough.

   Update Reply
Matt @ 01/10/2007 18:48  

Hmm ok, changed something which might fix it. It's actually 13 miles! LONGdifMile = LONGdifUnit * 2 * (4*Atn(1)) * cos(Postcode1_LAT) * 3956.545 /360 Changed to... LONGdifMile = (sin(LATdifUnit/2))^2 + cos(Postcode1_LAT) * cos(Postcode2_LAT) * (sin(LONGdifUnit/2))^2

   Update Reply
Matt @ 01/10/2007 19:14  

nope that doesn't work. ROchdale to scuunthorpe aint 3 miles! lol

   Update Reply
Matt @ 01/10/2007 19:27  

When i rode to the Isle of Wight I did 10 miles more than someone else riding with me. I did 167 miles they did 157 was it because i rode slower so took longer to do them and he rode fast so his speedo struggled to record them all.

   Update Reply
Cruiser gal @ 01/10/2007 19:34  

I go to CG'S house every week and never can go the same way... she lives in the bermuda triangle....LOL

   Update Reply
skins @ 01/10/2007 19:45  

I think Matt needs a holiday, or arresting! lol I hated Math's at school. Matt aka Carole Vorderman That's your excuse and you're sticking to it, eh Skins? You fellas always get lost, even with satnav

   Update Reply
Sandi @ 01/10/2007 19:57  

ok ok, think I've fixed it. Not implementing it everywhere just yet, but I'm testing it on the QUICK search page (Not the full search!). Go to www.bikermatch.co.uk (Homepage) And use the form there. Let me know if it works or not. It's now accurate to 0.01%!!!

   Update Reply
Matt @ 01/10/2007 19:58  

 Posts: 28       Pages: 1/2

Back to top
Facebook Twitter Google Pinterest Text Email