Automated correction of position and orientation parameters means better accuracy in final products.
In this process TerraMatch compares overlapping laser strips from different flight lines with each other. During the process it measures differences between temporary TINs or the intensity of laser points from different strips. After finding the best fit it adjust the orientation parameters. The user can decide if TerraMatch matches either all the data points or only points of selected trajectories.Key Features:
- A fully automatic procedure for correction of laser scanned surfaces
- Rigid modelling of errors in orientation
- Least-squares adjustment for estimation of orientation errors
- The observations are differences in elevation and/or intensity
- Area based matching adjusted to the geometry of laser scanning
- "Data-snooping" for detection of gross errors
Advantages:
- Automatic adjustment and control of laser data
- Integrated with an TerraScan, TerraModeler and TerraPhoto for processing laser data
Before correction: Laser points on a building roof show mismatch between different strips.
Afterroof correction: The strips match well with each other.
