The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
71 
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/