The Multi-Array Galactic Plane Imaging Survey (MAGPIS) is an ongoing

project to map out the northern Galactic plane in the 21 cm radio continuum.

The survey identified 30 probable supernova remnant

candidates in the Galactic plane from 18° ≤ l ≤ 32°. H I absorption spectra were taken toward these sources using data from

the VLA Galactic Plane Survey (VGPS).

Using both circular and hydrodynamical Galactic rotation models, the

corresponding distances were calculated.

Of the 30 candidates, distances to nine of them were determined, and

another eight sources

had their distances constrained with upper and lower

bounds. Many of these sources have detectable radio recombination line

emission toward them, and the possible nature of these sources is discussed.