Point me please?

[+bottlecap]

I need a little help with mathematics, and coordinates, can you help?

 

I'm planning a cache, I'm ok with the math, but how do I incorporate coords, got a linky?

 

Thanks.

[+welch]

I don't quite understand what your asking...

but a good thing to read is always Markwell's update to the FAQ

[+bottlecap]

Ok, I'll be more specific. I have two sets of coords, and want to make an equalatteral triangle for the third point out of them, and was hoping someone could provide a linky.

[+ve1bvd]

No link, but the math isn't hard.

 

If you know the two coords, then you know the distance between them, and the bearing from one to the other, right?

 

Let's assume for simplicity that they are 100 ft apart, and point 'A' is due west of point 'B' i.e. the bearing of B from A is 090°. Let's assume further that the third point, 'C', is in a northerly direction from the line joining A and B.

 

The third and final assumption is that your GPSr can project a waypoint--if it can't, you'll have to resort to a compass.

 

From point A, project a bearing that is 60° less than the bearing of B...in this case 030°. Along that line of bearing, add your waypoint 100 ft away. If you're starting from B, add the 60°. If the third point is in a southerly direction from the baseline, reverse the procedure above [i.e. from A, add the 60°, and from B subtract it].

 

Hope this helps...

 

Phil/ve1bvd

[+OienLabs]

This one might help you. http://www.fizzymagic.net/Geocaching/GeoCalc/GeoCalc.html