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4.4 Mask for data input 
The data input have to be performed by the specialists 
themselves in order to guarantee a correct management. 
So, user-friendly inputs masks have to be designed considering 
the different skills of the people involved in the project. 
In this way each specialist can insert the data without having to 
deal with all the complex relationships between the tables, IDs, 
primary keys, etc. (Figure 5) 
The created masks have to accomplish in the best possible way 
the format used by each specialists during the collection of the 
data on the field. 
In order to guarantee the check of the inserted data the original 
documents have to be inserted into the database as raster file. 
5. G.I.S. PERFORMANCES 
One of the main aims of the GIS is to share information 
between specialists in order to help them in the correct 
interpretation of the acquired data and, in the future, to obtain 
an efficient communication of the achieved results. 
In fact a GIS allows to perform several spatial analysis which 
are easy from a technical point of view, and very important and 
effective for the historical and archaeological study of an area. 
The location query, for example, is a simple and direct way of 
accessing the database, by using the location of the object of 
interest on a map. 
4 #.*«¡»*¿'>-•<4 
Figure 6. Identify on the San Martin church entity 
a*. ÄEÜ*■“**•••****> a— 1 * •! 
Figure 7. Information about dating and sources of a structure 
Figure 8. Selection by Attributes: gold mines and quarries 
Users can access a schedule in which there is a set of collected 
information. This information has been defined by the 
specialists in order to allow an easy understanding of the object. 
Figure 6 shows the data acquired on the Saint Martin Church, 
inside the castle of Graines; in this case the schedule collects all 
the data about the location and the description of this structure. 
It is also possible however to access information about the 
dating of the structure which was obtained from the 
bibliography and documents, and the authors of these 
publications, as shown in Figure 7. 
The GIS allows data to be classified using two different 
selections. The Selection by Attribute, and the Selection by 
Location. 
The Selection by Attributes allows those geometric entities that 
have the properties asked by the query to be identified. The 
query can be as simple or complex as the user needs. 
The query condition is an instruments that is useful to suggest 
new interpretations of the data, and sometimes deeper 
investigations, to the specialists. The selection in figure 8 shows 
the gold mines and quarries that have been identified in the 
Ayas Valley. 
The Selection by Location allows the selection of different 
entities which are on different layers of the GIS structure. It is 
therefore possible to carry out the so called spatial analysis. In 
the foregoing type of query the spatial content is based on the 
use of georeferenced data, while in the location queries the 
selection considers the topological link between the layers. 
Figure 9. Selection by location, all the entities enclosed in 
the municipal district of Brusson