The Online Digitized Sky Surveys server at the ESO Archive provides access to the DSS1 and DSS2 surveys produced at the
Space Telescope Science Institute through its Guide Star
Survey group. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and
the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions.
See the copyright notices. Other versions of DSS are available from
the STSci - DSS form
and the CADC - DSS form.
The entire DSS1 and DSS2 data are stored on magnetic
disks. Retrieval time takes less than 5 seconds for any field less than 20 arcmin in size.
A client to access the DSS-1 and DSS-2 at ESO directly from your computer (without Web browser) is available here. The client can also be used in batch mode, so as to submit multiple requests with a single command.
An implementation of the Simple Image Access Protocol (SIAP, an IVOA standard)
is also available. Check the service metadata.