Same as Fig. 1, but for G25.1−2.3. Here the λ11 cm and λ21 cm maps were extracted from the Effelsberg λ11 cm survey (Reich et al. 1990a) and λ21 cm survey (Reich et al. 1990b), respectively. The contours in the λ6 cm total-intensity maps are (n = 1, 2, 3 ...), in the λ11 cm total-intensity maps are (n = 1, 2, 3 ...), and in the λ21 cm total-intensity maps are (n = 1, 2, 3 ...). The polarization intensity threshold for the B-vectors is 12.0 mK  T_B at λ6 cm and 75.0   mK  T_B at λ11 cm. No polarization data at λ21 cm are presently available. The star-symbols in the λ6 cm maps (top left panel) indicate known pulsars in the field. The polygon in the λ6 cm image in top central panel outlines the area for the TT-plot spectral analysis shown in Fig. 5.