Tesseract
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Units model units

Drag to move across the ground. Right-drag to turn around the point under the cursor. Scroll to zoom toward it. Double-click to go there.

Set the scale from one known length

This clip has no GPS, so lengths are in the model's own units. Draw a line along something whose real length you know, such as a road lane or a car, then type that length.
TesseractReading the model