diff --git a/maps_nuopc.xml b/maps_nuopc.xml
index c9e6b60712..f5d3d56a01 100644
--- a/maps_nuopc.xml
+++ b/maps_nuopc.xml
@@ -95,77 +95,6 @@
       <map name="ROF2OCN_ICE_RMAPNAME">cpl/gridmaps/rJRA025/map_jra_to_tx2_3_nnsm_e333r100_230415.nc</map>
     </gridmap>
 
-    <!-- ======================================================== -->
-    <!-- GRIDS: glc to ocn mapping                                -->
-    <!--                                                          -->
-    <!-- Eventually we will also want glc to ice mapping files.   -->
-    <!-- These will likely differ from the glc to ocn mapping     -->
-    <!-- files in their degree of smoothing (or they may not be   -->
-    <!-- smoothed at all). But for now we are only specifying     -->
-    <!-- glc to ocn mapping files. (By default, glc to ice        -->
-    <!-- mapping is turned off in the system.)                    -->
-    <!-- ======================================================== -->
-
-    <gridmap ocn_grid="gx1v6" glc_grid="gris4" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx1v6_nn_open_ocean_nnsm_e1000r300_marginal_sea_171105.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx1v6_nnsm_e1000r300_171105.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v7" glc_grid="gris4" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx1v7_nn_open_ocean_nnsm_e1000r300_marginal_sea_171105.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx1v7_nnsm_e1000r300_171105.nc</map>
-    </gridmap>
-    <!-- POP's estuary box model is currently not active for gx3v7, so we need nnsm maps for liquid as well as ice. -->
-    <gridmap ocn_grid="gx3v7" glc_grid="gris4" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx3v7_nnsm_e1000r500_180502.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_gx3v7_nnsm_e1000r500_180502.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v6" glc_grid="gris20" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx1v6_nn_open_ocean_nnsm_e1000r300_marginal_sea_171105.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx1v6_nnsm_e1000r300_171105.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v7" glc_grid="gris20" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx1v7_nn_open_ocean_nnsm_e1000r300_marginal_sea_171105.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx1v7_nnsm_e1000r300_171105.nc</map>
-    </gridmap>
-    <!-- POP's estuary box model is currently not active for gx3v7, so we need nnsm maps for liquid as well as ice. -->
-    <gridmap ocn_grid="gx3v7" glc_grid="gris20" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx3v7_nnsm_e1000r500_180502.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland20km/map_gland20km_to_gx3v7_nnsm_e1000r500_180502.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v7" glc_grid="ais8" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/ais8/map_ais8_to_gx1v7_nn_open_ocean_nnsm_e1000r300_marginal_sea_TOBECREATED.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/ais8/map_ais8_to_gx1v7_nnsm_e1000r300_TOBECREATED.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="tx0.66v1" glc_grid="gris4" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_tx0.66v1_nnsm_e1000r300_190314.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_tx0.66v1_nnsm_e1000r300_190314.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="tx2_3v2" glc_grid="gris4" >
-      <map name="GLC2OCN_LIQ_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_tx2_3_nnsm_e250r250_230914.nc</map>
-      <map name="GLC2OCN_ICE_RMAPNAME">cpl/gridmaps/gland4km/map_gland4km_to_tx2_3_nnsm_e1000r300_230415.nc</map>
-    </gridmap>
-
-    <!-- ======================================================== -->
-    <!-- wav->ocn, ocn->wav, ice->wav -->
-    <!-- TODO: these should be removed - only here for backwards compatibility with MCT -->
-    <!-- ======================================================== -->
-
-    <gridmap ocn_grid="gx3v7" wav_grid="ww3a">
-      <map name="WAV2OCN_SMAPNAME">cpl/gridmaps/ww3a/map_ww3a_TO_gx3v7_splice_150428.nc</map>
-      <map name="OCN2WAV_SMAPNAME">cpl/gridmaps/gx3v7/map_gx3v7_TO_ww3a_splice_150428.nc</map>
-      <map name="ICE2WAV_SMAPNAME">cpl/gridmaps/gx3v7/map_gx3v7_TO_ww3a_splice_150428.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v6" wav_grid="ww3a">
-      <map name="WAV2OCN_SMAPNAME">cpl/gridmaps/ww3a/map_ww3a_TO_gx1v6_splice_150428.nc</map>
-      <map name="OCN2WAV_SMAPNAME">cpl/gridmaps/gx1v6/map_gx1v6_TO_ww3a_splice_150428.nc</map>
-      <map name="ICE2WAV_SMAPNAME">cpl/gridmaps/gx1v6/map_gx1v6_TO_ww3a_splice_150428.nc</map>
-    </gridmap>
-    <gridmap ocn_grid="gx1v7" wav_grid="ww3a">
-      <map name="WAV2OCN_SMAPNAME">cpl/gridmaps/ww3a/map_ww3a_TO_gx1v7_splice_170214.nc</map>
-      <map name="OCN2WAV_SMAPNAME">cpl/gridmaps/gx1v7/map_gx1v7_TO_ww3a_splice_170214.nc</map>
-      <map name="ICE2WAV_SMAPNAME">cpl/gridmaps/gx1v7/map_gx1v7_TO_ww3a_splice_170214.nc</map>
-    </gridmap>
-
     <!-- ======================================================== -->
     <!-- MizuRoute mapping files -->
     <!-- ======================================================== -->