Abstract: The invention relates to a method for requesting and transmitting electronic resources via a data network. A web server operating according to said method interprets the URL path of a query inputted by a client as identification information, which is independent of the physical storage site of the requested web page. In order to find the requested web page, the identification information is assigned to the physical storage site in the server. To this end, the web server uses a databank in which the physical storage site for web pages made available by the server and a character string serving as identification information are stored. The inventive method makes it possible to use short content-related and easy-to-note URLs which are persistent due to the independence from the physical storage site.

Abstract: An automatic stereo plotter comprises a correlator and a follow-up unit, which is preferably employed to follow-up a measuring mark in z-direction relative to a stereo model to be evaluated. In order to improve the efficiency of the stereo plotter additional means are provided which increase the amplification factor between the parallax error signals at the output of the image correlator and the follow-up signals. Thus variations in the video signals derived from the measuring photographs are compensated for. Such means are, for example, an adjustable amplifier, which can be set to a plurality of stable amplification factors, and an analog multiplier which, due to a corresponding control voltage, permits a continuous variation of the amplification.