Synthesized spectral rasters obtained using forward-modeled analysis. Panel a shows the synthesized intensity, while the panels b and c show the Doppler maps (mimicking the SPICE CIII line) with and without local velocities imposed on top of the feature. The black ellipse in panel c shows the location of a strong signal that corresponds to the high intensity gradient. The magenta ellipse outlines the location that does not correspond to any intensity gradient.