The dataset is also separated into several layers covering administrative boundaries, lakes and rivers in different 'densities' according to their importance. A shaded relief is also added. Another example of such a special digital product is a placename database of Switzerland. Situation in other European countries National surveying agencies in other European countries offer similar digital cartographic products. Pixel maps and digital height models are available in almost every country.
Some countries have projects to collect digital base data at large scales.
The evaluation of a suitable computer graphics system will be completed in mid-1995. At the moment this project is still in its specification phase. Swiss Federal Office of Topography, Wabern, 1992. Swiss Federal Office of Topography, Wabern, 1992. Pixel Maps .