The red laser levels cut through the dust of the renovation site, painting straight lines across the rotting plaster of the old textile mill. Elias squinted at them, then down at his tablet, then back at the chaos of the room.

Three reliable methods to get correct scale:

| Mistake | Consequence | Fix | |---------|-------------|-----| | Scaling from a short distance (e.g., 10 ft) | High error | Use 100+ ft reference | | Using a screenshot with perspective tilt | Wrong proportions | Use “Top down” view in Google Earth | | Forgetting units (feet vs meters) | Scale factor off | Set UNITS before scaling | | Not locking image after scaling | Accidental movement | RENAME image → layer lock |

Manual scaling can be prone to human error. Several tools offer automated scaling and georeferencing. Scaling a Google map image on auto CAD

| Method | Accuracy | Best for | |--------|----------|----------| | | High | Site plans, property lines | | 2. AutoCAD Geolocation (built-in) | Very high (with coordinate system) | Newer AutoCAD versions | | 3. Third-party tools (Google Earth Pro + GIS) | Highest | Professional work |

One point down. The image shifted, rotating violently.