Example of two sources in LoTSS-DR2 (orange and white contours) matching with a LoLSS (purple outline and colour background) source. The orange and purple ellipses represent the FWHM, the blue line connects the centres, while the red dot is the point where the value exceeds the matching condition and is accepted. Both matches are accepted, because either the second matching condition (upper left source) or the first (lower right source) is fulfilled, as indicated by the values.