International cooperation and technology transfer

Fras, Mojca Kosmatin

Bibliographic data

Monograph

Persistent identifier:: 856490555

Author:: Fras, Mojca Kosmatin

Title:: International cooperation and technology transfer

Sub title:: Ljubljana, Slovenia, February 2 - 5, 2000 : proceedings of the workshop

Scope:: VI, 163 Seiten

Year of publication:: 2000

Place of publication:: London

Publisher of the original:: RICS Books

Identifier (digital):: 856490555

Illustration:: Illustrationen, Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: G.P.S. AND G.I.S. FOR REALIZATION AND GOVERNMENT OF ROAD CADASTRE. Giuseppe Mussumeci

Document type:: Monograph

Structure type:: Chapter

133 ■ time necessary for initializing (however, with respect to the 15 min that the manufacture stated as necessary, we found that 5 min was sufficient). Instrument advantages were: ■ the high precision and ■ reduced number of personnel (only two GPS operators and one car-driver), ■ reduced time for measurements, ■ predetermination of operational time. cases, in fact, the difficulties and the uncertainties of inserting the survey in a cartographic system risk accepting times and precision that are not acceptable. However, the potentiality of G.P.S. and the prospect of further technological enhancements for greater precision, together with the necessity of cataloguing the extensive road infrastructure, make the research in the road sector interesting from the point of view of new and more efficient means of surveying. Figure 1 - Surveyed curves (example). 7. Conclusive Considerations The great versatility of GPS and the high precision also in the field of navigation, immediately allowed the researches to hypothesize its use for surveying road infrastructures. After the first encouraging experiments in Italy in 1990, its widespread use has not been seen. In fact, despite the good experimental results obtained, there are a series of conditions that limit the fields of use of GPS methods for road surveys. The greatest obstacle is the obstruction of the satellite signals along any stretch of road especially urban ones. The precision, furthermore, is referred to the covered trajectory of the vehicle and not to the road axes, which are obtained by interpolation curves and/or approximations and that, consequently, are affected by further errors. Finally, we must consider the difficulty of the operations (also topographic) that are necessary for the passage of the ellipsoidal WGS84 co-ordinates to those of the local cartographic system, which requires the connection of the GPS points to the vertices and bench-marks determined in the national system with traditional instruments In particular, in the case of road surveys, it should be borne in mind the altimetric profile found with GPS is not directly connected to local cartography. The GPS heights, in fact, are ellipsoidal heights, while the official cartographic system has geodetic heights. The transformation of the GPS co-ordinates into cartographic or local Cartesian co-ordinates is still complex and uncertain, as the knowledge of local shifting between geodetic and ellipsoidal is not yet sufficiently precise and diffused (it is surely not comparable to the precision with which GPS provides geocentric co-ordinates). These considerations induce a certain cautiousness in believing that the use of GPS techniques are always correct for plano-altimetric surveying of roads, above all when the survey is for cartographic up-dating. In these Selected Bibliography W. Paterson , 1991 “Choosing an appropriate information System for road management”, “XIX World road congress AIPCR” - Marrakech. M. Bordin, S. Rossi, E. Salvatori, 1994.“Rilievo automatizzato delle caratteristiche geometriche e funzionali della strada per la costituzione del catasto stradale” - tema IV, p. 163-167, “XXII Convegno nazionale stradale AIPCR” - Perugia Ministero Italiano dei LL.PP. 1995,- Direzione Generale della Viabilità e Mobilità urbana ed extraurbana. “Studio ed apprestamento di supporti conoscitivi per la definizione delle modalità di istituzione ed aggiornamento del Catasto delle Strade” M.R. De Blasiis, 1996 “Il catasto delle strade per la gestione del patrimonio e la programmazione territoriale”, Collana di Ingegneria delle Infrastrutture Viarie n.2, supplemento n.1, Infrastrutture e territorio, maggio 1996. G. Bitelli, G. Dondi, 1996 “L’impiego delle tecniche di rilievo GPS nella realizzazione del catasto stradale”, Collana di Ingegneria delle Infrastrutture Viarie n.2, supplemento n.1, Infrastrutture e territorio, maggio 1996. L. Leone, G. Mussumeci, 1996 “Problematiche e prospettive dell’impiego del GPS per il rilievo plano- altimetrico delle strade”, Collana di Ingegneria delle Infrastrutture Viarie n.2, supplemento n.1, Infrastrutture e territorio, maggio 1996. L. Leone, G. Mussumeci, 1996 “Standard della cartografia di base per Sistemi Informativi Territoriali delle Infrastrutture Viarie (SITIV)”, Collana di Ingegneria delle Infrastrutture Viarie n.2, supplemento n.1, Infrastrutture e territorio, maggio 1996. C.B. Gauer, M. Trzaski, M. Paoli, 1997 “Integration of computer applications into a highway planning process”, “XIII World meeting IRF” - Toronto, Ontario, Canada, giugno 1997. M. Barbarella, L. Vittuari, 1998 “Il rilevamento GPS: sviluppi recenti” - voi. I, p. 7-16, “Il Conferenza nazionale della federazione delle Associazioni Scientifiche per le Informazioni Territoriali e Ambientali” - Bolzano, novembre 1998. V. Casella, R. Gaietto, 1998, “Tecniche innovative per il rilevamento terrestre, aereo e da satellite” - voi. I, p. 33-54, Il Conferenza nazionale della federazione delle Associazioni Scientifiche per le Informazioni Territoriali e Ambientali” - Bolzano, novembre 1998. J. Wolf, S. Hallmark, M. Oliveira, R. Guensler, W. Sarasua, 1999 “Accuracy issues with route choice data collection using GPS”, 78 th Annual meeting TRB - Washington, D.C. gennaio 1999.

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