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Demonstrator Release Notes (R0.3)

Release R0.3 is available for end-users and user support partners on DAT or Exabyte tape during the April 1997 Meeting and parallel demonstration in Athens, for SUN SPARC workstations.

Please note that SUN workstations should:

  • have at least 32 MB RAM (64 recommended) and sufficient (128 MB) swap space
  • run under Solaris 2.5 or higher,
  • run CDE as a window manager
  • support high-resolution (1280*1024) 8 bit color graphics
  • be connected through a LAN/WAN TCP/IP connection to
    • a name server (for an external server only), can be run locally;
    • access to a "server" with an http daemon and the cgi and server demo executable
which means, if you don't have network access, you can still run the client-server demo on a single machine (which is then client and server at the same time ...)

The Release R0.3 contains what was demoed in Athens, plus an extension of the client-server part using a data-driven selection of servers and a special cgi/model demo available source code with the cgi scripts as an example.

you can either run the ISC model here on our server, or you can run a simple demo generating a simple geometrical pattern as a the result from a cgi/"model" (that will eventually be replaced by MUSE, REGOZON, MEMO, DYMOS, POM and MODFLOW etc.) that we distribute with the demo.

You can, of course, write your own cgi/model based on our example and connect any other "model", provided it generates the same (structurally) output, which is a single matrix (of floats) covering the 100*100 km model domain (NOTE: no model domain extent has been fixed for Gdansk yet) with grid cell sizes of 1 km (or any other size that fits into the 100 km domain like 2 km, 500m, 200 m, etc.)

Once this is done, the next step involves the temporal and multi-parameter extensions and (possibly) the multi-layer and vector data issues, foreseen for R0.4, already designed for the on-site validation.

The main objective is to provide you with an example as to how a vector of "model parameters" (we use the set from the ISC model) is sent to the model-server, and how the "model" should return a matrix of concentration values to the interface-server for display.

You can find extensive documentation on the http protocol and server installation/configuration in a local copy or under the original source at NCSA at

R0.3 also contains the Berlin air quality observation data time-series as an example of the time-series data structures.

Copyright 1995-2002 by:   ESS   Environmental Software and Services GmbH AUSTRIA