TracePoint

1. Load an image — drop a photo onto the left panel, or pick the demo from the image menu ☰
2. Level the image (optional) — use the Level tool to correct a tilted horizon before adding lines. Makes alignment more accurate
3. Add a line — click + New Line, then drag it to align with a direction visible in the scene (road, shadow, building edge pointing away from the subject)
4. Place 2 reference points — switch to Add Point mode, click the line twice. Then click each point's 🌐 P1 pill and mark its real-world location on the map
5. Repeat for a second line — once two rays are drawn their intersection marks the estimated camera position. Add a third or more for a confidence ellipse around the result

💡 You loaded the Potsdam demo. Try adding a line along the road or a building edge, then find that same feature on the map.