Map and compass: A practical introduction

By Christian Jensen - 11.01.2026

Some time ago, I ran a small survey to learn more about how people use maps and compasses. The results were pretty much what I expected: most people don’t carry a map and compass, and many don’t really know how to use them. Of course, there are always a few classic exceptions. I won’t claim to be an expert myself, but I’ve managed to navigate successfully many times using nothing but manual tools. In this post, I’ll walk you through the basics of how a map and compass actually work — and add a few essential skills that form the foundation of good navigation.

Understanding the Map

The two most important elements of any map are the legend and the grid lines. If you hold the map so the legend is readable, north will be at the top and west to the left.

The legend contains more than just symbols — it also includes the scale. Most hiking maps use a 1:50,000 scale. That means:

1 meter on the map = 50,000 meters in real life
Or more practically: 1 cm on the map = 500 meters on the ground

If your compass has a built‑in ruler, you’ll find a small scale on one of the edges showing distances in kilometers.

If your map includes contour lines, the legend will also show the contour interval. On my map, the interval is 20 meters — meaning each contour line represents a 20‑meter change in elevation. The terrain can vary up to ±20 meters between lines without being shown, so an area that looks flat on the map may actually be quite uneven. Some map producers shade these areas darker to make the terrain easier to interpret.

Orienting the Map

Before you start navigating, the map should be oriented to the terrain. This simply means rotating the map so that features on the map line up with what you see around you. When the map is oriented correctly, ridges, lakes, valleys, and paths will “make sense” visually. This is one of the simplest but most important skills for beginners.

Magnetic Declination

Magnetic north and true north are not always the same. In Norway, the difference is usually small, but it’s still worth knowing that:

The compass needle points to magnetic north
The map is drawn with true north at the top

Most modern hiking maps show the local declination. For basic navigation in Norway, you can usually ignore it, but it’s good to be aware of.

Reading the Terrain

Contour lines are the key to understanding the landscape. With a bit of practice, you can recognize:

Ridges (contours forming long, narrow shapes)
Valleys (U‑ or V‑shaped contours)
Hills and peaks (closed circles)
Depressions or bowls (closed circles with hachures)
Steep slopes (contours close together)
Gentle terrain (contours far apart)

Being able to match these shapes to the real world makes navigation far easier, especially in poor visibility.

Basic Navigation

Navigating with a map is actually quite simple. What makes it challenging is the environment around you. Poor visibility, bad weather, or difficult terrain can make map reading much harder. In a storm, for example, the first priority is finding shelter, not pulling out the map.

If you know where you are and where you want to go, navigation becomes straightforward. Start by drawing an imaginary straight line between your current position and your destination. Place the edge of your compass along that line. Then rotate the compass housing until the red north arrow printed inside the housing lines up with the north‑south grid lines on the map, pointing toward the top of the map.

Now lift the compass off the map and hold it in front of you. Turn your body until the floating red needle aligns with the north arrow inside the compass housing. The direction of travel arrow now shows the direction you should walk. If you also know the distance and your approximate walking speed, you’re ready to go.

Using “Handrails” in the Terrain

Instead of walking blindly on a straight compass course, it’s often smarter to follow natural or man‑made features such as:

Rivers
Ridges
Valleys
Forest edges
Trails
Power lines

These features act as handrails, guiding you safely and reducing the chance of drifting off course. This is one of the most useful techniques for beginners.

Estimating Distance

Knowing how far you’ve walked is just as important as knowing the direction. You can estimate distance by:

Using the map scale
Timing your walking speed
Counting steps (pacing)
Using terrain features as checkpoints

Remember that distance feels longer in rough terrain, deep snow, or steep climbs.

What If You Don’t Know Where You Are?

This is where things get more challenging. Fortunately, I’ve never been truly lost, but I like practicing this skill from time to time. My preferred method is triangulation, but it requires some practice and a decent understanding of the terrain. Good visibility helps a lot, because you need to identify landmarks around you.

Ideally, you should find three distinct landmarks. Two can work, but you won’t get a verification line.

I start by looking around. I spot a small lake below me, but it’s fairly round, so it’s hard to pinpoint my exact position relative to it. Lakes are usually excellent reference points, but this one isn’t very distinctive. I keep scanning the landscape and notice a mountain formation with four peaks, two of them higher than the others. That’s a good landmark. I find another one to my right.

Now I pull out the map. I have a general idea of where I am, but not the exact location.

With three landmarks identified, I take out the compass. I point it at the lake and rotate the housing so the floating needle aligns with north. Then I place the compass on the map and draw a line. I repeat the process with the first mountain peak. Ideally, the two lines will intersect. To verify, I draw a third line from the last landmark. If all three lines meet at one point, I’ve found my location. If they form a small triangle, that’s my uncertainty zone.

In the example shown, the lines form a triangle. Based on the map scale, I can determine my position with an uncertainty of about ±100 meters — which is perfectly acceptable in most situations.

Common Sources of Error

Even experienced navigators make mistakes. The most common include:

Misreading contour lines
Forgetting to orient the map
Following the wrong terrain feature
Overestimating or underestimating distance
Navigating while tired, stressed, or cold
Poor visibility

Being aware of these helps you avoid them.

A Simple Starter Kit

For anyone wanting to learn map and compass skills, I recommend:

A hiking map in 1:50,000 scale
A simple mirror compass
A waterproof map case
A pencil for marking positions
Practicing in good weather before trying in poor conditions

Practice Makes Perfect

One thing is certain: the more you practice, the better you get. So get outside, bring a map and compass, and try it for yourself. It’s surprisingly fun — and a skill that might one day be very useful.