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Section 3. Archiving Marine Survey Data#

3.3 Metadata and Documentation#

In order for an archive to undertake proper archiving of a project's data, it is important that as much information as possible is recorded and stored with the archive at a number of levels i.e. project, survey/dataset and file level. The metadata and documentation required by an archive can vary and has been discussed in general terms in Section 2.3.

File level metadata, as previously highlighted, is largely dependant on the file type but a list of the files that have been deposited should be included with the archive. This should list filename, file size, software package and version used to create the file and a short description of the file's contents. This documentation should be created in digital form to be preserved alongside the data files themselves for future users of the resource. As with file level metadata, project level metadata requirements vary and a number of standards currently exist as detailed in Section 2.3.

Comprehensive Documentation - section 5 covers this but the specific sections of relevance are:
5.2 Project metadata elements
5.3.1 All Survey Techniques - elements relevant to all survey types
5.3.3 Magnetometer Surveys - for marine magnetometry
5.3.6 Maritime Sonar Surveys - maritime sonar surveys 5.3.7 Survey Methodology|Geophysics_5] of the Geophysics guide) 5.4 Data treatment - software used and any data processing

App 2 Georeferencing Geophysical Data http://guides.archaeologydataservice.ac.uk/g2gp/Geophysics_App2 discussion of georef inc accuracy etc.

Positional and Navigational Data

Datasets containing positional data can come from a number of sources on marine projects and are largely dependant on the data collection methodology. The VENUS project missions, for example, largely focussed on the collection of multiple data streams, including positional data, via unmanned Remotely Operated Vehicles (ROVs). Other projects may use a similar methodology to record the position of divers through a combination of acoustic tracking and GPS.

Positional data may be possibly processed and not the raw data. Any processing carried out should be suitably documented.

For both Wessex Archaeology's Wrecks on the Seabed project and the VENUS project this data was seen as crucial to the project archive as it sets much of the other project data in context. It forms a vital reference point for the position of the ROV or diver individual photographs were taken, segments of digital video recorded or general observations made.

As with positional data, it is important to document any processing carried out on the original datasets.


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