The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008
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This will assist the generation of numerous virtual presentations
of the daily life on the ship, a rather worthy tool to the historical
research.
4.8 The Geographic Catalogue Server
It is obvious from the previous Sections that this Project
produces a wide digital content of various types and formats,
ranging from digital image files to web mapping applications.
In order to make this content available and increase usability,
we have been generating a geographic catalog server. This
server will be able to diffuse all the digital content on the web,
using widely accepted standards for services and protocols
(such as those proposed by ISO/TC211 and OGC). In other
word, the catalog server will transform the digital repository to
a Spatial Data Infrastructure (SDI; Williamson et al., 2004) for
the history of the battleship “G.Averof’.
The software package adopted to implement the geographic
catalog server is the GeoNetwork Open Source Server (Figure
8). We have stored in this server appropriate metadata for the
digital content (i.e., digital photographs, deck plans and battle
plans) and the applications generated under this project. The
metadata are in XML format and follow the specification of
IS019139.
.
[ ] \ • - •
Pi THt porta) to «pateas -dati Stá Ы& .. 'í * Ш * - : Ьууилаа *
Figure 8. The initial screen of the Catalog Server for the
battleship “G.Averof’. Available at: http://averof.
dynalias.net/sdi
The metadata items have been generated in an automated
procedure, similar to the one in Figure 6 and they are
subsequently imported (batch import mode) to the GeoNetwork
Catalog Server. Figure 9 presented graphically the procedure
for the generation of the photographs metadata items.
Image
Database
SELECT Result java script IS019139
► ► template
Zl
GeoNetwork
CatalogServer
7
batch import
tool
Figure 9. The procedure towards the generation of the metadata
items for the historical photographs.
Figure 10 presents the metadata of a historical photograph as
presented to the end-user. As mentioned above, this metadata is
encoded based on an ISO 19139 template (XML format).
Should Web users be authorized, they are capable to connect to
the GeoNetwork server, access, browse the metadata and
retrieve the geospatial content and/or applications. The server
provides them an efficient interface to pose queries on metadata
items with thematic, spatial and temporal predicates.
Figure 11 presents the customized query interface in
GeoNetwork Catalog Server for the battleship “G.Averof”.
End-users may enter: (a) the thematic predicates at the left side
of the screen (e.g., a Keyword=“Naval battle of Elli”) and/or at
the right side of the screen (e.g., Category= “Image file”); (b)
the spatial predicate on map frame at the middle of the screen
(e.g., Spatial Query Window=[min_long, minlat, maxlong,
maxlat]); and/or (c) the temporal predicate at the top-right side
of the screen (e.g., Temporal Interval = [1911-1915]).
5. CONCLUSION
This paper presents a series of systems and tools generated or
under development to promote and enrich the Archives of the
legendary warship “G. Averof’. Special attention has been
given to the spatio-temporal dimension of the battleship history,
while modem technologies in web mapping and catalog
services have been adopted.
Our future actions are twofold. Firstly, to complete and further
customize the systems and tools described in Section 4. This is
expected to be concluded by the end of this Project in
December 2008. Secondly, to launch a new Project with special
focus on the analytical functionality over the historical
repository. Our research, towards this direction, will include the
enhancement of semantics associated to the digital content, the
establishment of semantic networks, and the adoption of more
efficient multimedia presentations.
REFERENCES
Adobe Flash, http://www.adobe.com/products/flash/
Adobe Photoshop Elements, http://www.adobe.com/products/
psprelements/
ESRI ArcGIS, http://www.esri.com/arcgis
“G. Averof’ Museum, http://www.bsaverof.com/