The showcase is demonstrating how the current process for fusing multiple surveys and surface generation can be improved both in terms of automation and processing spent. These improvements will enable surfaces to be generated for much larger areas and also in response to user control. The user control requires a new approach to the current deconfliction method so surveys selected by users can be combined without the need for human interaction. The user–controlled or interactive deconfliction planned to be implemented in IQmulus will combine the metadata of the different datasets with geometrical properties of the different datasets as well as their spatial relationships.
The Marine Showcase is formulated as follows:As the processing starts from point clouds, either general ones or in a raster structure, it is natural to identify portions of the point clouds that in an incremental process gradually can be represented in a compact way. The first result will be a spline representation where parts of the initial point clouds that are not well represented by the spline are identified. This representation is a good starting point towards a final result which will be a hybrid representation of point clouds, triangulations and splines, where the remaining point sets may be semantically tagged. The approach will draw heavily on the longstanding experience of some consortium partners in shape representations, especially from CNR-IMATI (for triangulations) and SINTEF (for piecewise polynomial splines).
The following aspects of IQmulus functionality are being demonstrated in this showcase:
- (MS1) Marine DEM generation: rapid and flexible generation of a single seamless surface from multiple disparate point cloud source data and associated visualization. The workflow inculdes a deconfliction step.
- (MS2) Inspection of the quality of the representation. The work flow is tightly integrated with MS1 and can serve as a starting point for a more interactive deconfliction process than the one envisaged in MS1.
- (MS4) Change detection by comparing DEMs from different dates. In year 2 the focus will be on raster represented DEMs.
- (MS5) It demonstrates Lidar WaveForm coastal Feature Extraction. The workflow has a major role in production of a seafloor 2D map with labels corresponding to identified sea bottom types using Bathymetric Lidar Full WaveForm Data.
The originally planned MS3 workflow has been down prioritized, and will not be implemented.
The main advantage of the marine DEM generation method offered by the Showcase is the high accuracy control and a non-uniform, lean representation format. It can reduce the time taken to generate a surface. These are steps towards interactive and on-demand surface generation inresponse to user inputs.
Examples of the Marine Showcase