The Catalogs and Surveys Group of the Space Telescope Science Institute has digitized the photographic Sky survey plates from the Palomar and UK Schmidt telescopes to produce the "Digitized Sky Survey"(DSS). Each plate covers 6.5 x 6.5 degrees of the sky and have been\ndigitized using a modified PDS microdensitometer. The DSS blue HiPS is a combination of DSS2-XJ and DSS2-S. DSS2-XJ north is the digitalization of the POSS-II J (1987-1998 - 0.491um) from Caltech,DSS2-S south is the digitalization of the SERC-J (1975-1987 - 0.468um) and SERC-EJ (1979-1988 - 0.468um) from ROE.The all-sky HEALPix resampling has been done by the CDS with the help of CADC. Original acknowledgement for data: The Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. 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. The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society. The Second Palomar Observatory Sky Survey (POSS-II) was made by the California Institute of Technology with funds from the National Science Foundation, the National Geographic Society, the Sloan Foundation, the Samuel Oschin Foundation, and the Eastman Kodak Corporation. The Oschin Schmidt Telescope is operated by the California Institute of Technology and Palomar Observatory. The UK Schmidt Telescope was operated by the Royal Observatory Edinburgh, with funding from the UK Science and Engineering Research Council (later the UK Particle Physics and Astronomy Research Council), until 1988 June, and thereafter by the Anglo-Australian Observatory. The blue plates of the southern Sky Atlas and its Equatorial Extension (together known as the SERC-J), as well as the Equatorial Red (ER), and the Second Epoch [red] Survey (SES) were all taken with the UK Schmidt. Supplemental funding for sky-survey work at the ST ScI is provided by the European Southern Observatory.