| 1 | Digital video recording with fish-eye lens and high-definition cameras from a moving vehicle |
| 2 | Calculating the height of building contours using images captured via fish-eye lens |
| 3 | Converting high-definition video images into AVI files to obtain still images |
| 4 | Producing still images of overhead views of buildings based on digital aerial photos |
| 5 | Placing optically distorted still images on polygons (contours) comprising each building |
| 6 | Placing polygons on a 50-m mesh elevation map published by the Geospatial Information Authority of Japan, which provides accurate height information |
| 7 | Embedding building information (e.g., addresses, tenants) as metadata |
| 8 | Adding information on underground structures (e.g., fire hydrants, sewer lines) as optional data |