  A mid-infrared atlas of part of the Galactic plane ($75^\circ < l <
148^\circ, b = \pm6^\circ$) has been constructed using HIRES processed infrared
data to provide a mid-infrared data set for the Canadian Galactic Plane Survey
(CGPS). The addition of this data set to the CGPS will enable the study of the
emission from the smallest components of interstellar dust at an angular
resolution comparable to that of the radio, millimetre, and far-infrared data
in the CGPS. The Mid-Infrared Galaxy Atlas (MIGA) is a mid-infrared (12 $\mu$m
and 25 $\mu$m) counterpart to the far-infrared IRAS Galaxy Atlas (IGA), and
consists of resolution enhanced ($\sim 0.5'$ resolution) HIRES images along
with ancillary maps. This paper describes the processing and characteristics of
the atlas, the cross-beam simulation technique used to obtain high-resolution
ratio maps, and future plans to extend both the IGA and MIGA.
