Open Session - SWISS GEOSCIENCE MEETINGs

302
Symposium 12: Data acquisition, Geo-processing, GIS, digital mapping and 3D visualisation
Die Vorgehensweise der Datenerfassung über Grafikprogramme bietet zwei wesentliche Vorteile:
1) rasche und einfache Datenerfassung durch Verwendung von Bézierlinien
2) freie Gestaltung der kartografischen Elemente, der dargestellten Objekte und der Maquette. Damit ist die Möglichkeit der
Druckausgabe in hoher Qualität gegeben
Bézierlinien beschreiben einen Kurvenverlauf mathematisch mit wenigen Ankerpunkten. Damit ist eine präzise Erfassung
komplexer Kurvenverläufe möglich Korrekturen und Anpassungen können einfach durchgeführt werden. Für den Export in
GIS werden die Bézierlinien in Polylinien konvertiert. Mit Hilfe eines Zusatzprogrammes des Institutes für Kartografie (IKA,
ETH-Zürich) kann diese Konvertierung gesteuert und mit hoher Präzision durchgeführt werden.
Abbildung 1: Vergleich der Liniendarstellung durch Bézierlinien (links) und Polylinien (rechts) nach dem Konvertierungschritt.
12.6
The relevance of digital data and techniques to applied geosciences
Beer Christoph* & Beres Milan*
*Swiss Geological Survey, Federal Office of Topography swisstopo, Seftigenstrasse 264, CH-3084 Wabern (christoph.beer@swisstopo.ch)
Geoinformation has become one of the most important components of the national economy. An added value is thereby
created in economic, administrative and everyday activities. The current market volume of the private geoinformation market
is estimated to total 500 Mio. Swiss Francs per year (Fig.1). In comparison to estimates in 2002, the market volume has
increased by 300 Mio. Swiss Francs, equivalent to 5% growth per year.
The operational meaning of digital technology is in the making of existing data useful, in the transfer of knowledge and in
the networking and co-ordination of data sources down to the customer groups. The most modern technology is essential
for handling digital data, particularly in knowledge management. Such technology permits the association of simple datasets
for the purpose of recognizing their significance and eventually gaining practical information from them. If this new
information is linked with existing information and knowledge, then more knowledge can be generated. Increased knowledge
improves the understanding of phenomena and the development of innovative solutions.
Together with the free market use, digital geodata and geoinformation have substantial social and economical uses. They
are indispensable for making clear and comprehensible decisions and for engaging the public in important political decisions
and social developments. Geoinformation is becoming increasingly important in practically all aspects of life. Various
studies of cost-use analyses show that the economical use of digital geoinformation is 4 to 10 times higher than its production
cost.
Digital geodata are a raw material with the highest potential in the supply chain. On the one hand there is the one-time
profit margin within the value chain of a data-producing enterprise. But since geodata and geoinformation reside in a network
of various customers and multiple refinement stages, their added value becomes enormous.
In short, Geodata are a top-ranking good in both political and economical regards.