We spectroscopically identify 101 Galactic HII regions using spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey, cross-matched with an HII region catalog derived from the all-sky Wide-Field Infrared Survey Explorer (WISE) data. Among all HII regions in our sample, 47 sources are newly confirmed. Spatially, most of our identified HII regions are located in the anti-center area of the Galaxy. For each of the HII regions, we accurately extract and measure the nebular emission lines of the spectra, and estimate the oxygen abundances using the strong-line method. We focus on the abundance distribution of HII regions in the Galactic anti-center area. Accordingly, we derive the oxygen abundance gradient with a slope of -0.036+/-0.004dex/kpc, covering a range of R_G_ from 8.1 to 19.3kpc. In particular, we also fit the outer disk objects with a slope of -0.039+/-0.012dex/kpc, which indicates that there is no flattening of the radial oxygen gradient in the outer Galactic disk.

Cone search capability for table J/PASP/130/K4301/table1 (Catalog for the spectroscopic properties of HII regions in our sample)