Canadian Galactic Plane Survey (CGPS)

Observations of the 21cm spectral line from atomic hydrogen (HI) and radio continuum emission at 1420 MHz were obtained using the Dominion Radio Astrophysical Observatory (DRAO) as part of the Canadian Galactic Plane Survey (CGPS). The surveys cover Galactic longitudes 63° < l < 175° and latitudes -3.5° < b < 5.5°.

The resolution of both the continuum and HI data is 1 arcminute.

CADE currently only serves a HEALpix map of the HI integrated intensity emission. This HI map is constructed by integrating the HI spectral line cube over all 272 channels (each with a velocity resolution of 1.3 km/s).

The HI data has units of K km/s. The continuum data has units of K.

Healpix maps made by D. Paradis.


CGPS HI CGPS Continuum

Atomic Hydrogen


Combination of the CGPS with the VGPS data (units: K km/s)


More information on the VGPS page.

Radio Continuum


Combination of the radio continuum of the CGPS with the VGPS data (K units)


More information on the VGPS page.


Enter the following URLs in Aladin (“Files” then “Use directly a URL”):

The combination of the VGPS with the CGPS HiPS is available in Aladin Collections/Image

Original WCS Data

Project Website

See also