How to Project a Waypoint
Last Updated on Monday, 03 April 2006 05:23 Written by Administrator Saturday, 19 November 2005 05:53
Projecting a waypoint can be a difficult concept to wrap your head around. Luckily, recent GPS receivers and geocaching programs take away most of the heavy lifting from us.
We'll be using a Garmin Legend C and the steps required to project a waypoint.
First thing to know about projecting a waypoint is that we need three pieces of data:
- Origin Coordinates
- bearing
- distance
The goal is to find a waypoint using these three pieces of data.
A typical example would be doing a multi-cache geocache and the final waypoint includes only the bearing and distance. The geocache would then be located at the distance and bearing from the last multi-cache location.
So, let's look an example, using a Garmin Legend C.
First we get to our waypoint. In this example, we'll assume that this waypoint is the origin.
Once we have the waypoint selected, we should see its data page. Next we hit the FIND button to access the waypoint menu.
We'll select "Project Waypoint" from the menu.
From here, we enter the bearing data field.
Finally the distance data field.
Now we can hit the MAP or GO TO button to view the resulting projected waypoint.
If your GPS does not have this feature, you can compute the projection from your computer or PDA:
- Compute lat/lon given radial and distance from a known point
- Using Cachemate
- If you have another GPS unit that does a similar function, email them to me and I will include them to this tutorial.
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