| Tool | Type | Pros | Cons | | :--- | :--- | :--- | :--- | | | Free | No cost, good for learning. | Time-consuming, low accuracy, difficult scaling. | | AutoCAD Raster Design | Autodesk Add-on | Seamless integration, powerful vectorization. | Expensive separate license; learning curve. | | CAD-Earth | Third-party Plugin | Easy UI, handles 3D meshes well, affordable subscription. | Recurring cost; requires internet connection. | | Scan2CAD | Standalone Software | Excellent raster-to-vector algorithms. | Separate workflow (Export -> Import). |

Google Earth uses a geodetic coordinate system (Latitude/Longitude) based on the WGS84 datum, while AutoCAD typically utilizes a Cartesian coordinate system (X, Y, Z). Directly importing Google Earth images without rectification results in distorted, non-scaled drawings. Furthermore, Google Earth imagery is raster-based (pixels), whereas AutoCAD designs are vector-based (lines, polylines).