Sprinkler heads, cart GPS and the scorecard: how to read a course map

Most golfers look at a course map the way they look at a subway map in a city they are visiting: long enough to find the next stop, never long enough to understand the network. The diagram on the back of the scorecard, the hole sign on the tee, the screen on the cart, the yardage book in the pro shop all carry more than a picture of the hole. Read properly, they tell you where the hole wants you to miss.

A map does not make your swing better. It stops you from aiming a good swing at the one place on the hole where it costs a stroke, and for a golfer who shoots in the 90s that is worth more than anything they could change on the range this month.

What a course map is actually telling you

Four kinds of map turn up on an American course, and they do not say the same thing. The scorecard diagram is a sketch: it shows the shape of the hole, the main hazards and a few numbers, and it is rarely drawn to scale. The hole sign on the tee is often the same sketch, larger, with the yardage from each set of tees. A yardage book is a different object, drawn from a survey, to scale, with distances to carry bunkers and reach water written on the page. A GPS screen, on a cart or in an app, sits on top of satellite imagery and measures from where you stand.

Before you trust any number, answer two questions. First, measured from where? Tee signs count from a plate or marker on the tee, and the tee markers may have been moved ten yards forward or back that morning. Second, measured to where? Most American courses measure fairway yardages to the center of the green. Some measure to the front, and a few do both. The scorecard or the book usually says so in small print, and it is the most expensive line on the page to skip.

Then find the scale. A fairway that looks generous on a scorecard sketch can be 30 yards wide where your drive lands. On a yardage book, measure one known distance with your thumb and you have a ruler for the whole hole.

Five things to find on every hole before you tee off

Look for the same five things, in the same order, every time.

• Your landing zone. Take your real carry with the club you plan to hit, not your best drive of the year, and find that distance on the hole. What is there: fairway, a bunker, the edge of a penalty area, a dogleg you will run through?
• The width at that distance. Holes narrow and widen. The fairway might be 45 yards wide at 200 and 25 yards wide at 250. That is often the best argument for a shorter club off the tee.
• The lines that cost strokes. White stakes or lines mark out of bounds, which is stroke and distance. Red and yellow mark penalty areas, where you drop with a one stroke penalty. A map that shows OB tight on one side and a penalty area on the other has just told you which way to favor.
• The green’s depth and shape. A green 35 yards deep is a two or three club green depending on the flag. A kidney shaped green with a bunker in the gap is really two small targets.
• The short side. Look at where the trouble sits around the green. Missing on the side with no bunker and plenty of green to work with is a bogey at worst. Missing on the other side is how doubles happen.

Reading the numbers: carry, reach, front, back

A good yardage book gives two kinds of number to hazards, and mixing them up is the most common way golfers find the bunker they were trying to clear. The number to reach a bunker is the distance to its front edge. The number to carry it is the distance to its back edge. On a fairway bunker those can be 20 or 25 yards apart. If your drive carries 220 and the bunker is 205 to reach and 228 to carry, you are hitting straight into it.

Greens work the same way. A hole that plays 152 to the center might be 138 to the front and 166 to the back. A front flag makes the center number a club too long, a back flag a club too short. Many courses post a daily pin sheet or use colored flags to show roughly where the hole is cut; ask in the pro shop.

Elevation is the one thing a map shows badly. A few books add arrows or a plus and minus figure, satellite views show nothing. When a shot plays clearly uphill, take more club than the number says.

Plan the hole backward from the green

The habit that turns a map into strokes saved is simple: decide where you want to hit your approach from, then work back to the tee.

Take a 390 yard par 4. The map shows a fairway bunker on the left, 230 to reach and 255 to carry, and a penalty area along the right from 235 to 280. The green is 30 yards deep with a bunker short left. The driver looks like the natural club. It is also the club that brings both hazards into play.

Now work backward. Your most reliable full approach is a 9 iron at about 135 yards. From 135 out, the tee shot needs to travel 255 yards, which is exactly where both hazards pinch. A hybrid at 200 leaves 190, a long approach, but from the widest part of the fairway. A 3 wood at 225 leaves 165 with a 6 iron, from short of both hazards. The map has turned a hopeful driver into a choice between two sensible clubs, and it has told you to aim the approach at the right half of the green, away from the bunker short left.

It takes about thirty seconds per hole, and on most holes the answer is the obvious one. The map pays for itself on the three or four holes where it is not.

Make the map your own

Printed maps are written for everyone. If you play the same course often, print a set of hole diagrams and mark them up at home.

• Write your carry distance for driver, 3 wood and hybrid on the tee of each hole, so you can see where each one lands.
• Circle the places where a miss costs a stroke, and draw a small arrow toward the safe side.
• Mark your preferred approach distance on each par 4 and par 5, the yardage you would choose if you could.
• After each round, put a dot where your tee shots actually finished. Three rounds in, the dots tell you more than any lesson about which way you really miss.

The Rules allow all of this. Handwritten notes are fine, as long as you are not building a detailed replica of the green contours. Since January 1, 2019, the USGA and The R&A have limited images of putting greens used during a round to a scale of 3/8 inch to 5 yards (1:480) or smaller. Traditional course guides that show a green’s outline and its general slopes are permitted. A rangefinder or GPS is allowed too, unless the committee has adopted the Local Rule that bans them, but the function that measures elevation must be off. Under the current Rules, the first breach costs the general penalty and a second one in the same round means disqualification.

Mistakes golfers make with a course map

• Taking the center number as the flag number. It is the most common misread, and it costs a club on every front or back pin.
• Reading the wrong tee. Scorecard diagrams often show the yardage from the back tees. If you play from the middle set, subtract before you plan.
• Trusting an old map. Bunkers get filled, trees come down, tee boxes move. A book from ten years ago can be wrong in exactly the place that matters.
• Planning for your best shot. Use the carry you hit seven times out of ten. The map is there to protect the three.

Where American golfers find a map they can trust

Start with the markers in the fairway. On many American courses, colored stakes, discs or plates follow a simple code: red for 100 yards, white for 150 and blue for 200, usually to the center of the green. Many courses also stamp yardages on sprinkler heads, which are often more accurate than the stakes because they were surveyed individually. The code varies from course to course, so check the scorecard or ask at the counter before the first tee, and ask the other question too: center or front?

The scorecard itself is a map, and its back is where the local rules live: out of bounds lines, dropping zones, cart paths and native areas, sometimes whether desert areas are played as penalty areas. On a desert course in Arizona or Nevada, that one line changes how aggressively you should play the whole round. The front gives the course rating and slope for each set of tees.

Carts at many daily fee and resort courses carry a GPS screen with a hole flyover. Ask one question of it: does it know today’s flag position, or only the middle of the green? Phone apps built on satellite imagery raise the same question, and are less reliable on a recently renovated course.

Yardage books are sold in the pro shop at many resort courses and at clubs that host events, and some courses publish hole by hole guides on their websites. Playing somewhere new, print the guide the night before and do the backward planning on the kitchen table. At a busy muni with nothing but a tee sign, the habit still works: pace off from the nearest sprinkler head, look at the shape of the green, and find the short side.

A thirty second routine for every tee

• Check the tee you are on and whether the numbers are to the center or the front.
• Find your real carry on the map and look at what sits there, and how wide the hole is.
• Locate out of bounds and the penalty areas, and decide which side to favor.
• Pick your ideal approach distance and choose the tee club that leaves it.
• Note the short side of the green before you get there.

Five questions, thirty seconds, eighteen holes. For the next step, see five shots you can save without changing your swing, and if you are choosing a device to get the numbers, rangefinder or GPS: which one lowers your scores. For the right set of tees to plan from, read which tees you should actually be playing.