308 
Several professional surveyors work on GPS, having as 
reference the IGM95 first order GPS network. Some 
companies are equipped with GPS/INS vehicles for road 
survey. 
GPS is used in some cities to monitor the bus fleet, and 
some private transport companies use GPS with the same 
purpose. A GPS security service is used on cars connected 
with GSM. 
4. CONCLUSIONS 
The GPS activity in Italy is strong in the research field and 
in the geodetic applications, supported by the Ministry of 
Research and University, the Italian Space Agency, The 
National Research Council. The vehicle management is 
increasing and a DGPS national service is essential for the 
diffusion as well as for new applications and research 
activity. 
Real time kinematic DGPS is quite useful also in the 
current cartographic work since it allows the real time 
control of the standard deviation 
The most promising DGPS method seems to be DAB, 
which will allow also the transmission of updated maps. 
On continental basis for transport applications, the 
extension to East Europe of GNSS 
(GPS+GLONASS+EGNOS) is one of the main goal and 
will diffuse the applications to terrestrial fleet control and 
other use at consumer level. Diffused applications to air 
traffic near and inside airports are expected to increase 
safety. 
Lanslide and soil movement GPS monitoring will also 
increase as the receivers are cheaper and compact. 
Moreover cadastal cartography is moving towords the 
use of satellite positioning, which fact is helped by the 
reference stations network.. 
In conclusion, the applications will increases more and 
more the importance of the satellite positioning methods. 
The extension of DGPS to east Europe will open a wide 
new market, which fact means the peace so highly 
desired at the end of this bloody century. 
Ahrer H., Doeller H.-GPS-Netz GesmbH-AREFl- 
DARC-Technical Report GPS Netz Ziviltechniker 
GembH, Voecklabruck, A 4840, 1998); 
de Robertis A., Gerin R.-Public Transport GPS Positioning 
in Trieste-Meeting on Data Radiobroadcasting for 
Differential GPS Positioning and Navigation, University of 
Trieste, March 6, 1998 
Dittrich J., Kuehmstedt E., Richter B., Reinhart E.- 
Accurate Positioning By Low Frequency (ALF) and other 
services for emission of DGPS correction data in Germany- 
Proceedings Int. Symp on DGPS in Engineering and 
Cadastral Measurements, Education and Practice, 
Ljubljana, August, 25-27,1997, Reports on Geodesy, 
6(29), 1997,Politechnika Warszawska, Warsaw 
Faendrich H.-DAB Pilot Project Baden Wuerttemberg- 
Sueddeutschen Rundfunk Stuttgart, Heft 24, Stuttgart 
1998 
Femetti M., Manzoni G.-A GPS+GLONASS Multimedial 
Reference Station for DGPS+DGLONASS Positioning and 
Terrestrial Navigation- Proceedings Int. Symp on DGPS in 
Engineering and Cadastral Measurements, Education and 
Practice, Ljubljana, August, 25-27,1997, Reports on 
Geodesy, 6(29), 1997,Politechnika Warszawska, Warsaw,pp 
29,36 
Hoeggerl, 1997-DGPS Service in Austria- Proceedings 
Int. Symp on DGPS in Engineering and Cadastral 
Measurements, Education and Practice, Ljubljana, 
August, 25-27,1997, Reports on Geodesy, 
6(29), 1997,Politechnika Warszawska, Warsaw 
Manzoni G., Plattner G.- DAB, Digital Audio Broadcasting 
and DGPS experiments, to be published on Reports on 
Geodesy, Politechnika Warszawska, Warsaw 
Oszczak S.-Egnos Project for Integration of GPS with 
Glonass System- Proceedings Int. Symp on DGPS in 
Engineering and Cadastral Measurements, Education and 
Practice, Ljubljana, August, 25-27,1997, Reports on 
Geodesy, 6(29), 1997,Politechnika Warszawska, Warsaw 
References on DGPS