Wetlands emit roughly the same amount of methane (CH₄) as all anthropogenic sources combined, through pathways that are evolving as the planet warms. Wetland emissions are usually estimated from point-based techniques, which can be cumbersome and may not account for the expected heterogeneity of emissions. This study explores the use of a long-wavelength infrared imaging Fourier transform spectrometer (LWIR IFTS) for measuring CH₄ column density over extended path lengths and large areas. The instrument (Telops Hyper-Cam mini xLW) generates an intensity spectrum for each pixel interferometry. Gas temperature, background temperature, as well as the H2O and CH₄ column densities are inferred for each pixel by regressing a modeled spectrum to the measured spectrum. Field trials were conducted at wetlands and water reservoirs in southern Ontario from autumn 2024 – winter 2026. Pixelwise column densities inferred from the IFTS are validated through coaxial measurements made using an open path tunable diode laser absorption spectroscopy (TDLAS) system operating over the 1652 nm CH₄ absorption line, and also compared to flux chamber measurements. Findings reveal that measurement viability is strongly influenced thermal contrast, largely controlled by solar irradiation and background. While instrument’s ability to detect seasonal variability was limited, it was able to capture CH₄ emissions and their spatial variation over large areas, ultimately highlighting the utility of this technology in wetland CH₄ measurements.