5. CONCLUSION 
With the development of GIS the need for quality 
system has increased. There is now the possibility to 
document every step of a control procedure ; this 
may lead to a huge amount of information which may 
create an extra overhead to the database. 
It is also necessary to simplify procedures in order to 
reduce time and cost. This can be achieved by 
developing methods and tools which will facilitate the 
management of quality information. 
Finally, more research is required in order to find out 
whether a continuous quality control leads to a 
significant quality improvement of the final product 
and which processes require special attention in 
order to optimize the whole production line in terms of 
quality. 
REFERENCES 
Bouloucos, T., 1995 : Selected statistical concepts 
used in GIS, ITC lecture notes 
Eslami, A., 1995 : Development of a quality control 
procedure for photogrammetric digital mapping, MSc 
thesis ITC 
Faiz, S., Boursier P., 1994 : Modelling and Visualizing 
the quality of geographic information : an object- 
oriented approach. EGIS 1994 pp. 161-167. 
Ginervan, M., 1979 : Testing land-use map accuracy: 
another look, PE & RS vol. 45, No 10, 1979. 
Grussenmeyer, P., 1994 : Contróle géométrique de 
la saisie en photogrammétrie, Thése de doctorat, 
Université de Strasbourg. 
Hottier et al., 1994 : Le contróle topographique d'une 
carte ou d'une base de données constituée par voie 
photogrammétrique, Revue XYZ, No 59 1994 pp. 39- 
43. 
Newby, P.R.T., 1990 : Quality management for 
surveying, photogrammetry and digital mapping at 
the Ordnance Survey, ISPRS, Commission IV, pp. 
106-115. 
Thapa, K., Bossler, J., 1992: Accuracy of Spatial data 
used in geographic information systems, PE & RS, 
Vol. 58, No 6, June 1992. 
Veillet, l., Leconte, G., 1995 : Evaluer la qualité de la 
BD TOPO : l'approche de l'IGN, Bul. S.F. P. T. No 
137, pp. 119-123. 
17 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996