Seismic Data Analysis Center

Bundesanstalt für Geowissenschaften und Rohstoffe, Germany

The SDAC environment

SDAC picture
Photo: Bundesanstalt für Geowissenschaften und Rohstoffe

The Seismic Data Analysis Center at the Federal Institute for Geosciences and Natural Resources automatically collects, archives and analyses seismic data from national seismic stations according to the protocol of the Comprehensive Test Ban Treaty (CTBT).

UNIX systems are used for interactive analysis of the data to determine epicenters and magnitudes of earthquakes. The analysis program based on the C language and the X Window system developed by the Institute runs on Sun workstations under Solaris.

Visual inspection is done on two 18" flat screens which are virtually combined by the XbigX software.

Bundesanstalt für Geowissenschaften und Rohstoffe
Markus Dohmann
+49 511 643 3155

Our contribution: XbigX

The SDAC installation shows the typical application of the XbigX product.

One screen is not enough. However, simply adding a frame buffer and connecting a second monitor is not the real solution. Because the X Window system treats multiple screens separately, the limitation of one monitor is not overcome. To benefit from the additional screens the user wants to move or even stretch windows over multiple screens.

The XbigX proxy maps one or more virtual screens arbitrarily on one or more real screens of an X Window server. Due to its unique proxy principle the applications connect to the X Window display as usual, without any modification.

The mapping is really arbitrarily. Normally invisible gaps may be made visible by panning a screen over the virtual display. Overlapping screen areas provide more overview near the screen borders.

Often the mouse pointer image is difficult to find on the large virtual screen. XbigX allows to zoom the cursor image for all applications.

X-Software GmbH
+49 8334 9867 70

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