Green maps were one of the most requested features in Shot Pattern's user survey last fall.
I'd been on the fence about building them for a while. They're expensive to do well, and I wasn't willing to ship something mediocre. I actually got all the way through integration with one vendor before pulling the plug because the data quality wasn't there.
I'm writing this post because I think most golfers are going to use green maps the wrong way.
The instinct, when you first see a green with slopes and contours laid out in front of you, is to treat it as a targeting system. Figure out where the green tilts, pick a spot that sets you up for an uphill putt, aim there.
But that's not what green maps are for.
Unless you're Scottie Scheffler, you don't have enough control over your golf ball to reliably land an approach shot on a specific portion of a green. If you did, you'd aim for the hole.
This isn't a knock on anyone. It's just the reality of what's achievable for the other 99.9% of us. Trying to engineer a precise putt angle with your approach is a fool's errand.
What you can do is understand which parts of the green will destroy your score if you miss, and which parts are genuinely forgiving. That's the real job of a green map.
The key concept to understand here is what it means to be “short-sided”.
Short-sided means the distance between your ball and the edge of the green is greater than the distance between the pin and that same edge of the green.
In other words, if the lie forces you to hit the shot with more air time than ground time, you’re short-sided.
Here's an example.
Imagine you're 10 yards from the hole and 3 yards off the green. In this scenario, you aren’t short-sided. Why? Because there are 7 yards of putting surface between you and the pin. That’s plenty of room to land on the green and let the ball work toward the hole.
Now flip it. Same 10-yard distance from the pin, but now you're 7 yards off the green. Here you are Short-sided. You have to carry the ball at least 70% of the distance just to reach the putting surface.
In this scenario your margin for error collapses. The shot requires more height, more precision, more spin, etc. And, importantly, when you’re short-sided more things can go wrong.
That’s why it’s generally considered bad to be short-sided. But there’s an important catch.
The key to whether a short-sided shot is deeply penalizing (and needs to be avoided) or relatively easy (and doesn’t need to be feared) heavily relies on the slope of the green. The direction and severity of the slope is the key factor
Being short-sided when the green is running away from you is nearly a guaranteed dropped shot. But being short-sided back into an upslope is often nothing to be afraid of, just like Luke Kerr-Dineen details in the video below:
This is what you need to identify before you hit an approach: where is the pin, and where would being short-sided cost you the most?
This is where green maps play a crucial role. They give you the data you need to answer those questions.
Think of the slope percentages in the green map as your early warning system.
At Tour level green speeds, hole locations are placed on blue or green areas on the map. Red, orange, and pink areas (i.e. slopes > 4%) can be so slippery that the ball may not stop on these contours.
If you take away one thing from this section, let it be this: not all short-sides are equal. Green Maps help you determine which are really bad and which are just… not great.
Again, this sounds pretty complicated when it’s written out like this. Luke does a great job breaking down all the details in the video above. It’s 100% worth taking 18 minutes to watch (or 12 min on 1.5x like I tend to do).
The second reason to use a green map has nothing to do with your approach. It's about what happens once you're on the putting surface.
After my first year tracking data in Shot Pattern, I was confronted with a humbling (and perhaps relatable) reality: my putting was considerably worse than I'd assumed.
To solve the issue, I did two things. I got fitted for a new putter. And I started learning a green reading system.
The one I use is called Tour Read, developed by Ralph Bauer. The concept is similar to Aimpoint in that both systems use slope percentage to calculate break.
The key difference is that Tour Read doesn't require measuring with your feet or fingers. It's a simple calculation you can run in your head in about 3 seconds.
Trust me, it’s really easy. If you can do seventh-grade math, you can do Tour Read. I'd estimate most golfers can learn it in 20 minutes.
The catch is that it requires accurate slope data. If you're guessing at the percentage, the calculation doesn't help you much.
That's exactly where a precise green map earns its keep. You're not estimating the slope in front of you. You're reading it.
When your green reading is anchored to actual data, the confidence change is real. You're not hoping your read is right. You know the ACTUAL inputs.
For Shot Pattern's green maps, the data comes from StrackaLine.
They're the same provider used by college programs and tour players, and their data is detailed enough to make a system like Tour Read work.
If the slope data wasn't precise enough to support a green reading system, it wasn't good enough for Shot Pattern users.
I held the vendors to a really high bar, and StrackaLine passed it. You can be confident in this feature and start using it today to improve your game.
Shot Pattern overlays your personal shot dispersion patterns directly onto each hole. That means the green map isn't just showing you where the slopes are in the abstract. It's showing you the slopes in relation to where your shots actually land.
If your data shows you tend to miss an approach 10 yards right, and the right side of the green has a 4% slope running away from the pin, that's not a coincidence you discover mid-chip. That's something you can see and plan around from the fairway.
The strokes gained predictor takes this further. It models the expected value of different targets given your dispersion, so you're making target decisions based on your actual miss tendencies, not theoretical ideal outcomes.
Start your free trial of Shot Pattern — 7 days free, no commitment.