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interest. Our main users are the municipalities and other official The bridge/tunnel between the islands of Fyn and Sjelland (the
bodies. Great Belt) is important for development of new methods in
The guess today is that it will take 5 - 6 years to finish the surveying and mapping. Here photogrammetry has only served
conversion of the cadastral maps for the rest of the country. to a minor extent.
In order to meet this time limit it is planned to give private
companies the contract for more than half of the conversion
job. New trends in digital mapping
Jonna Hvidegaard
In the month of May 1988 new specifications for digital map-
ping were published by a committee under the Association of
Chief Engineers in the municipalities. This meant a break-
THE PRIVATE PHOTOGRAMMETRIC through for the standardization of digital mapping. These
COMPANIES standards have been used by all mapmakers since then.
The maps have been defined by 3 different standard types, T1,
T2 and T3, from simple to more differentiated mapping.
However, a very important standard type was established in
1989, TO (called T Zero) (see illustration). The idea of TO was
that it should cover the open country of Denmark to a degree
of 100 per cent, thus being a very economic mapping using
photo scales 1:18 000 -1:30 000. In 1993 Denmark is totally
covered by digital maps.
A new edition of the specifications is soon ready for
publishing.
Introduction
The period 1988-1992 was for Danish photogrammetric map-
makers the years, when digital mapping for the natural gas net
was completed.
As this project was of great importance for development of
digital mapping and the investments in new technique, the
private companies are now looking for new large projects in
Denmark and abroad.
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TO map
The digital TO coverage has been the most important mapping project in Denmark in this congress period. An important feature
is that roads are being mapped by the centre lines, and that addresses are added. The map is better presented in colour.
73
