Header: main navigation menu and related submenus. 
• Query: devoted to the data retrieval. In this part a 
searching aid form can be displayed. 
• Report: this frame will contain the search results, or the 
descriptive forms. 
• Graphic: is the main part of the Web page, where all the 
graphic searches are displayed in an Active CGM format. 
3. Case study 
Creation of the Web mapping application: this is the site 
setup. The different steps include: 
• search aids implementation to guide users in the 
database information retrieval; 
• integration of Active CGM maps in HTML 
documents; 
• to implement safe rules to avoid local network 
external users entering the system (a login procedure 
has been produced to prevent this problem). 
In order to show what has been illustrated before; fig. 5 shows a simple search example performed on the realised Web. 
Menu and submenus showing 
navigation paths 
Active CGM map sent from server 
to the client using a hypertext link 
(SHOW MAP). 
http://geomatic48/civwhtm/edifi cato.htm 
’oom Out 
Pan Down 
Pan Right 
i 
L 
FOTOGRAFICHE 
MAGNA 
TURISMO 
HOME 
VIABILITÀ’ 
UTENZE 
STORIA 
|yb( Netscape - [edificato] 
UNITA' EDILIZIA. 
Ricerca le informazioni relative al civico № WyW 
Displayable form in the report frame 
clicking on the building border (hot spot 
associated to a database dynamic 
extraction command). 
A, 
MOSTRAraeppA 
PIAZZA LAV 
№4, 
unità edilizia 
selezionata 
Codice unita 
4703 
¡Codice 
¡destinazione 
¡d'uso 
71.28495 
¡Supernae 
¡Penine tro 
34.546667 
¡Quota in 
¡gronda 
32.0 
¡Quota al 
¡piede 
6.65 
Evidenzia 
Database element extraction on the 
basis of the query frame requests 
L hotspot 
informazioni generali 
' caratteristiche edilizie 
ANALISI TEMATICHE 
quote in gronda 
destinazioni d'uso 
Figure 4 - Example derived from the designed GIS/WEB application