Information Technology Reference
In-Depth Information
how one feature in the landscape relates to another. An engineer might simply want
to know the size of a structure and where existing services are located. In other
terminology, laser scanning might be able to help inform on a particular subject by
contributing to the understanding. Scanning may also improve the accessibility of
the object.
Once the experts have a clear idea of the heritage site and the ultimate purpose
of the task, then whether laser scanning is appropriate or not depends on a range of
variables and constraints.
21.1.2.2 Frequent Applications for Laser Scanning
•
Contributing to a record prior to renovation of a subject or site which would help
in the design process, in addition to contributing to the archive record.
•
Contributing to a detailed record where a feature, structure or site might be
lost/changed forever, such as in an archaeological excavation or at a site at risk.
•
Structural or condition monitoring, such as looking at how the surface of an object
changes over time in response to weather, pollution or vandalism.
•
Providing a digital geometric model from which a replica model may be
generated for display or as a replacement in a restoration scheme.
•
Contributing to three-dimensional models, animations and illustrations for
presentation in visitor centres, museums and through the media (enhancing
accessibility/engagement and helping to improve understanding).
•
Aiding the interpretation of archaeological features and their relationship across
a landscape, thus contributing to the understanding about the development of a
site and its significance to the area.
•
Working, at a variety of scales, to uncover previously unnoticed archaeologically
significant features such as tool marks on an artefact, or looking at a landscape
covered in vegetation or woodland.
•
Spatial analysis, not possible without three-dimensional data, such as line of sight
or exaggeration of elevation, etc.
However, it is important to recognise that laser scanning is unlikely to be used in
isolation to perform these tasks. It is highly recommended that photography should
be collected to provide a narrative record of the subject. In addition, on-site draw-
ings, existing mapping and other survey measurements might also be required. The
capture of additional data helps to protect a user as it helps to ensure the required
questions can be answered as well as possible, even if the a subject has changed or
even been destroyed since its survey.
21.1.2.3 Meta Data - RepInfo
One major issue is that all existing data (and meta-data) of UNESCO is not yet
compatible with the OAIS model. In this sense UNESCO provides meta-data for
the testbed and the new tools developed within CASPAR for the UNESCO testbed
