Geodesy in the Netherlands*) by prof. dr. ir. M. J. M. Bogaerts, professor at the Department of Geodesy of the University of Technology in Delft. I am pleased to introduce to you geodesy, as it is practised in the Netherlands. Although, internationally seen, the methods and techniques applied in ourfield of profession do in principle not differ very much, the problems to be solved in our flat, densely populated country are quite different from those in, for instance, a mountainous country as Switzerland. When thinking over the factors that are greatly influenc ing the way in which we practice the profession in our country, I come to the following specific characteristics: 1. the level of education and research. Without exag geration we may say that this level is high, internatio nally seen. Geodesy (also surveying and mapping) in our country is being taught since a long time at uni versity level. Geodesy has its own faculty at the Uni versity of Technology in Delft. Already in the early days the education was connected with the activities of the „Rijkscommissie voor Geodesie" (Netherlands Geodetic Commission) which celebrated its cente nary last year. This faculty has always been the centre of research in the field of geodesy. It is characteristic for Dutch education and research that we, living in a country with a rather small linguis tic span, can acquaint ourselves with publications issued in the English-, German- and French-speaking countries, whereas there is rather little transfer of knowledge from our country. 2. The Dutch Cadastre (Office of Land Registry) which celebrates its 150th anniversary this year, has deter mined to a great extent the image of geodesy in this country. Many actions could be initiated by, or in cooperation with this Institution. An important aspect in connection herewith is that the Cadastre is a large public organisation, where - until recently - most tasks were carried out under direct management. Therefore, the profession of surveyor was in most cases a public function in our country. 3. The agricultural activities have always played an important part in our country. Since the beginning of the century, large land reconstruction projects have been carried out. Today projects with an area of 200 km2 are being carried out. In these projects the geodesists have an important task. On one hand they are responsible for a great part of the supply of in formation, and on the other hand for making new classifications of the property situation. In these ac tivities automation is very much in progress. Inleiding gehouden op 23 juni 1982 tijdens de door de NVG georganiseerde studiedag in het kader van de bijeenkomst van het Comité Permanent van de FIG te 's-Gravenhage. 208 4. The continuous struggle of the Dutch against the sea has resulted in large civil engineering works, some of which are still being carried out. A great part of our country is situated below sea-level, so that many dikes are required. Important projects are the recla mation of the IJsselmeer and the closing of the arms of the sea in Zeeland. It stands to reason that much geodetic work is necessary for the realization of these projects. Although the geodetic education in our country is independent, it has always had close relation with civil engineeringprogrammes. 5. Particularly in the field of education the Netherlands contribute in a large measure to the aid to the developing countries. In professional circles the International Training Centre (ITC) for photogram- metric education is well known. Many foreigners have taken a complete training or a post-graduate course at this Centre. In this afternoon's programme attention will be paid to all these aspects. A paper will be presented on the Netherlands' Cadastre and an explanation will be given of the role this Office plays in land arrangement projects. The work of the ITC is explained. Thereafter the activities of the Meetkundige Dienst van de Rijkswaterstaat (Survey Department of the Ministry of Transport and Public Works) will be discussed. Finally a number of activities of the industry in the Netherlands will be presented. Since education and research are hardly discussed here, I myself should like to make some remarks on these subjects. Education Although the geodetic/survey education is taught at all levels in our country, I shall limit myself to the education at the Department of Geodesy of the University of Tech nology in Delft, because the developments there greatly influence the way our profession is practised. For many years this education is a kind of twin-edu cation, on the one hand mathematical/technical and on the other hand aimed at planning and administration. As far as the mathematical/technical side is concerned, it is a matter of determining the shape of rather small parts of the land, and the surface and the bottom of the sea. In this case the main points are the measurements, the registration of measurements, the calculation and the mapping. Besides at surveying, the „mathematical/ technical" side of the education is aimed at the measu rement technique and the model-theoretical aspects of the surface of the earth in its entirety or of large parts of it. As regards the planning and administration side, the NGT GEODESIA 82

Digitale Tijdschriftenarchief Stichting De Hollandse Cirkel en Geo Informatie Nederland

(NGT) Geodesia | 1982 | | pagina 22