The Northeast Greenland Ice Stream (NEGIS) is an elongated feature extending ~600 km into the interior of the Greenland Ice Sheet. Here, we investigate detailed subglacial topography along the length of the NEGIS to ascertain the characteristics of the ice stream bed. Spatial topographic roughness describes the standard deviation of vertical change in bed elevation over a given horizontal distance (Root Mean Square height, or RMSh). RMSh values were derived from ice thickness data from AWI's P5-233_NEGIS_2022 and P6-211_EGRIP_NOR_2018 flight campaigns, where the majority of profiles were oriented parallel or perpendicular to ice flow direction. A moving window size of 960 m (64 data points) was used to calculate RMSh, and values are omitted where gaps in the ice thickness data were present. Roughness anisotropy was also calculated at the intersection of two flightlines, as the ratio between along- and across-flow roughness.