| 摘要 |
A method of generating a geodetic reference database product is disclosed The method comprises acquiring mobile mapping data captured by means of digital cameras, range sensors and position determination means including GPS and IMU mounted to a vehicle driving across the earth surface, the mobile mapping data comprising simultaneously captured image data, range data and associated position data in a geographic coordinate system. Linear stationary earth surface features are derived from the mobile mapping data by processing the image data, range data and associated position data. 3D-models are generated for the linear stationary earth surface features in the geographic coordinate system from the image data, range data and associated position data and stored in a database to obtain the geodetic reference database product. A 3D-model could include an image representing the colors of the surface of the 3D model or a set of smaller images representing photo-identifiable objects along the model. The 3D-models could be used to rectify aerial imagery, to correct digital elevation models and to improve the triangulation of digital elevation models. |
| 主权项 |
1. A method of generating, by a computer implemented system comprising one or more processors, a geodetic reference database product, the method comprising:
acquiring, by the one or more processors, mobile mapping data captured by means of digital cameras, range sensors and position determination means mounted to a vehicle driving across the earth surface, the mobile mapping data comprising simultaneously captured image data, range data and associated position data in a geographic coordinate system; determining, by the one or more processors, linear stationary earth surface features from the mobile mapping data by processing the image data, range data and associated position data; generating, by the one or more processors, 3D-models for the linear stationary earth surface features in the geographic coordinate system from the image data, range data and associated position data; and storing, by the one or more processors, the 3D-models in a database to obtain the geodetic reference database product; the method further comprising: generating, by the one or more processors, orthorectified images for the 3D-models by combining image data and range data, determining, by the one or more processors, elevation information in the geographic coordinate system for pixels of the orthorectified images; linking, by the one or more processors, the orthorectified images and the elevation information to obtain 3D-orthorectified images; and storing, by the one or more processors, the 3D-orthorectified images and linking the images to respective 3D-models in the geodetic database product. |
