International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 
  
  
5.1 THE INSTALLATION OF A GIS FOR THE 
TOWNSHIP OF ARZEW 
according to the available data and the existing means the 
realization of the Prototype Communal GIS of Arzew takes 
the three following phases as a basis : 
5.1.1 Data Organization Phase 
The organization of data and their modelling rests on the 
SRT, as presented in the section (8. 3) of this publication. In 
this context the data base on the Communal GIS of Arzew 
includes several data, that are represented under shape of 
layers according to the available initial data : 
General data : 
- A Plan of the structure 
- Plan parcels 
- Parklands 
- The postal addresses 
- Topographic plan 
- Aerial photo 
Data of networks : 
- A Plan of axes of streets 
- Networks of drinking water 
5.1.2 Data Seizure Phase 
Maps and the existing plans are the essential sources to the 
construction of our GIS, and to the creation of the different 
layers. The geometric whole is constructed from the 
different information numérisation representing on these 
plans and that appearing to be useful for our application. 
Before their definitive storage and their use in our system, 
the spatial data underwent pre-treatments: conversion of 
data structure, unification of the projection system. 
5.1.3 System implémentation Phase 
In accordance with our identified needs, vector GIS, DBMS 
Relational Multiconnexion and a footbridge to stock and to 
manage data multi-users georeferenced. And in order to 
validate the retained solution, the application will be driven 
under the following environments : 
| - Software Arcview® 3. 2 : The choice carried on this GIS 
because, on the one hand it offers the possibility to adjust to 
our problematic and the available data, on the other hand, it 
is available to the CNTS. Besides, it gives the possibility of 
the access as customer to the distant data according to 
architecture client/server (Fig. 3). 
2 - Software Oracle® 8i: Multiconnexion Relational DBMS, 
constitute an operational platform of production, permitting 
to publish a data base easily on the network, assuring an 
optimal transition traditional of the client/server thus toward 
network architectures. It also allows files of all nature to 
benefit from the security and the integrity of the data base 
(83. 5). 
3 - ArcSDE® 8. 0. 2: (SDE: Spatial Database Engine) It is 
the footbridge between the Multiconnexion Relational 
DBMS and the software GIS. The SDE permits to stock the 
spatial geometry (points, lines, polygons. ) and data 
attributiveses within a same relational data base, Oracle, 
Informix, IBM DB2, Sybase or SQL Server. It lets then to 
the Relational DBMS the care of the management and add it 
a certain number of specific geographical operators. it 
allows the relational data bases to understand and to exploit 
the spatial information. 
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To concretize the proposed solution we worked to the side 
Client ArcView® 3. 2, with its own Avenue® programming 
language to create a convivial work environment (Fig. 5), 
this last permits of : 
- To facilitate the access to information; 
- To execute requests according to the right of 
access; 
- To assure a fast and convivial communication for 
the client (user of the local geographical 
information), either locally either to a distant data 
base. 
In order to keep the set of clients (group of partners) in the 
same work context, this environment of work has been 
created like being an extension!" supplementary for the 
software ArcView®, its gives the possibility to transfer this 
environment on the set of clients joined to the network and 
connected to the Oracle RDBMS. 
  
(1): Extensions permit to share personalizations, documents 
or all other object, independently of a project. Extensions 
can be easily, intuitively used and created by all person 
knowing the language Avenue [ESRI 1996]. 
The main menu, allows the user to reach in a simple manner 
and predefined to data that interest him, while placing at its 
disposal the set of functions allowing him to do its tasks. it 
is composed of five elements : 
ERSTE 
    
Dre dr 
Llama dei | 
Fonts fuidap ey 
  
ara ga Yaad 
  
Faust se | 
Figure 5. The Main Menu 
Classes of entities : allows the user to choose the entity on 
which he wants to visualize or to do requests. 
Public Functions : to see the available and responsible 
public functions on classes of entities selected. 
Products : maps of the township, the cadastral plans, the 
aerial photos, orthophotoses, etc..., with which the user 
wants to work. 
Zone of work : allows the user to define the geographical 
zone of the township, in which he wants to select and to 
visualize data, to do its treatments or its cartographic 
reproductions, precisely. According to the available data for 
this application, we divided the zone of work in five under 
zones: Complex zone, Zabana zone, the center city, Plateau 
zone and the industrial zone. 
Closing : this function permits to leave the application, with 
a registration of modifications under the index of work 
named ARZEW in the user's disk root.