Shot Dispersion Visualizer
Your launch monitor already measured your pattern; this makes you look at it. Import a session (or load the sample), pick a club, and drag the aim slider until the fairway percentage stops lying to you.
Nothing leaves your browser. No upload, no account.
The method
Every shot is plotted down-range: distance up the page, side miss across it, exactly as it would land on a fairway. The ellipse is the selected club's one standard deviation footprint (the fainter ring is two); the shaded band is a fairway of the width you choose. The percentages simply count shots inside the band, first with the aim at dead center, then at the aim you set.
Parsing and plotting run entirely in your browser; your data is not uploaded anywhere. The Matrix app does this same exercise on satellite imagery of the actual hole, where the band is not a rectangle but the real fairway between the real bunkers, and the aim advice comes with strokes gained attached.
Questions
What CSV format does this read?
The common launch monitor export shape: columns Club, Type, Target, Total, Side, where Type is Tee or Approach and Side accepts values like -15.1, 3.6R or 2.4L. SkyTrak, Garmin R10 and Mevo sessions export to this shape or convert to it in a spreadsheet in a minute. Nothing is uploaded: parsing happens in your browser.
What does the ellipse mean?
It is the one standard deviation footprint of the selected club: centered on your average finish, one sigma wide in each direction. Roughly two thirds of your shots with that club land inside it. Its width, not your best shot, is what should pick your targets.
Why does shifting my aim change the fairway percentage so much?
Because your pattern is rarely centered on where you aim. If your driver bias is 9 yards right, aiming down the middle wastes half the fairway on your short side. Shifting aim to center the pattern, not the ball, is usually worth several percentage points of fairways without changing your swing.
How many shots do I need?
Ten per club starts to be meaningful, thirty is solid. Below that the ellipse is a sketch, not a measurement.
This math, on the actual hole.
Matrix runs the same engine on satellite views of real courses: your shot pattern on the fairway you play Saturday, strokes gained on a draggable aim line, and one specific practice priority. The first shot-map preview is free.