Information Technology Reference
In-Depth Information
convert such a meta-data in order that it matches the RepInfo requirements and
associated compatibility with OAIS.
An important component of the data management process is the definition and
management of “metadata”: data about the data. One major problem is that for the
moment the data still remains with the group that implemented the laser scanning
and therefore usually meta-data is neglected. In other words there is no need to
elaborate meta-data since I was the one doing the laser scanning and I know per-
fectly how the scanning was done, under which conditions, using what type of
equipment, etc.
However, the large amount of data is forcing the experts to submit the final record
for archiving in other organizations. It is then that the issue of meta-data becomes
urgently needed and necessary.
The very minimum level of information that might be maintained for raw scan
data might include the following:
1. file name of the raw data
2. date of capture
3. scanning system used (with manufacturers serial number)
4. company name
5. monument name
6. monument number (if known)
7. survey number (if known)
8. scan number (unique scan number for this survey)
9. total number of points
10. point density on the object (with reference range)
11. weather conditions during scanning (outdoor scanning only)
21.1.2.4 Different File Formats
The laser scanning technology for digital heritage has emerged from a large variety
of industrial applications. From cars, boats, aircraft, and buildings to turbine blades,
dental implants, and mechanical parts, 3D scanning provides you with high quality
digital models - no matter how big or small your part is. Scanning systems today
are capable of scanning miniature figurines a mere 4 mm high and can also scan a
240
long jumbo jet - all with incredible accuracy and resolution.
21.1.2.5 A Simple Illustrative Example
It would be extremely complex for CASPAR software developers to understand
the whole laser scanning process of for example all archaeological monuments of
Villa Livia: too much data, too many different techniques according to the various
monuments and too many different devices (hardware used).
However, the most important for UNESCO testbed developers as well as for
UNESCO is to understand the main concept, each step involved and the data
resulting out of each step.
