calculate bearing and distance

darth trader · Post by **darth trader** » 20 November 10 11:07 pm

I am stuck creating a hide trying to calculate the bearing and distance betwwen two given long/lat waypoints.

I want to have the cache finder stand at one waypoint and project X degrees and Y meters to find the next stage in a multicache.
I have my two waypoints in long/lat. what do I do with them?

help me obi one kenobi, you are my only hope.

Richary · Post by **Richary** » 21 November 10 12:20 am

OziExplorer will do it, if you have the 2 waypoints programmed in you can ask for distance and bearing between waypoints. It should even do it in the free version if you haven't registered.

Second choice but a bit less accurate is to plot the locations in google earth, draw a line between them with it's distance measuring tool and that will also give you distance and bearing.

Papa Bear_Left · Post by **Papa Bear_Left** » 21 November 10 12:52 am

Mr. Google knows even more than Obi Wan...

http://www.movable-type.co.uk/scripts/latlong.html

Fuddley · Post by **Fuddley** » 21 November 10 12:28 pm

Try going HERE and downloading the FuzzyCalc it is great for this type of thing

tronador · Post by **tronador** » 21 November 10 12:46 pm

You could use a compass, I find them the most accurate for taking bearings. And I mean a "real" compass not the electronic one on the GPS, which is only as good as the satellites you have at the time.

Blackbeards Pirates have a few caches that do what you want to do. Look at their cache Illa Wrong GC2C57 and Picnic with the Georges.GC246C

darth trader · Post by **darth trader** » 21 November 10 2:16 pm

thankyou all for your help.
I also found a free Iphone app, IGCT geocaching toolkit, which did the job, and I will field test my results tonight.
the Empire thanks you.

Big Matt and Shell · Post by **Big Matt and Shell** » 21 November 10 4:08 pm

darth trader wrote:thankyou all for your help.
I also found a free Iphone app, IGCT geocaching toolkit, which did the job, and I will field test my results tonight.
the Empire thanks you.

Mental note, leave that app on Shell's iPhone. have a feeling we will be needing it soon.

darth trader · Post by **darth trader** » 21 November 10 9:26 pm

Yeah, just setting up a 1klm night cache that also involves origami. Will be good for the dogs, when she gets better (not the origami- dogs don't have thumbs).

roundcircle · Post by **roundcircle** » 21 November 10 9:52 pm

One of the problems I've seen with Cache's where there's a need to do some sort of projection is working out which version of North is intended to be used. The Garmin O300 allows you to use True, Magnetic, Grid and User. I'm not sure how useful "user" would be though.

Echo · Post by **Echo** » 22 November 10 1:22 pm

roundcircle wrote:One of the problems I've seen with Cache's where there's a need to do some sort of projection is working out which version of North is intended to be used. The Garmin O300 allows you to use True, Magnetic, Grid and User. I'm not sure how useful "user" would be though.

And if that doesn't confuse you, grid north is the fixed north on a map, true north is about the same as grid north (over short distances and magnetic north is what a compass points at.
Unless you are good at calibrating a compass to a map, we find it easier to keep everything as magnetic (saves confusion).
Make sure you make a note of which north you use for your projection, it does make a difference.

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