After data acquisition and storage, the final numbers and associated presentation of the gathered data, and the success of a dredging operation depends for a large part on on the post-processing software.
Hydro international has published previous product surveys on software products varying from Swath bathymetry data acquisition, to data processing and navigation software. Although this survey focuses on software, in particular, post-processing capabilities for dredging works, we see that each product combines acquisition, navigation and processing capabilities. Only Caris products are specialised in processing capabilities alone and, therefore, support various standard sonar data formats from numerous acquisition packages. Viking Survey is the only product working on a non-Windows platform. Although DOS and UNIX were until recently much used, Windows may nowadays be considered the most stable operating system for these combined packages, and will be so for the foreseeable future. Huge amounts of data are being processed, especially with the use of swath bathymetry systems. Data has to be edited, but even minimal manual editing slows down the process to unacceptable levels. Thus automated filters and data-cleaning algorithms improve the efficiency of processing. The operator judges which filter and what settings are to be used in order to guarantee data integrity. This product survey gives wide insight into the various automated editing, algorithm and other mathematical tools in use with the various products. Hypack, QINSy and PDS-2000 provide the operator with the greatest choice. Presentation of data in 3D has become standard and even fly-through imaging is expected to become standard in the near future. Modern techniques and evolution in the development of software packages means these tools come within the reach of any user. If we look at Hypack, the user does not necessarily need to be educated in the English language, but can choose from nine languages. However, for the not-so-demanding requirements on dredging post-processing the market still offers simple and efficient packages just right for purpose.
Although we try, it remains difficult to benchmark and independently review the many software products, and therefore we rely on manufacturers to provide the relevant information.

Hydro International is much indebted to all software manufacturers who contributed to this product survey by filling in the questionnaire.

Participating Suppliers:

• Caris
• CT Systems
• Damen Dredging
• Fugro
• Hypack
• IHC Systems
• GL Systems
• Reson
• Tower Software
  QPS