method global attribute blank for area average.

[rljacob]

This is the header from an area averaged map. Looks like "method" is blank. Should it be?

// global attributes:
        :Title = "TempestRemap Offline Regridding Weight Generator" ;
        :concave_dst = "false" ;
        :concave_src = "false" ;
        :domain_a = "ne30pg2_20200209.g" ;
        :domain_b = "ocean.IcoswISC30E3r2.mask.scrip.20230901.nc" ;
        :grid_file_dst = "ocean.IcoswISC30E3r2.mask.scrip.20230901.nc" ;
        :grid_file_ovr = "oa_overlap.g" ;
        :grid_file_src = "ne30pg2_20200209.g" ;
        :method = "" ;
        :mono = "false" ;
        :nobubble = "false" ;
        :noconserve = "false" ;
        :nocorrectareas = "false" ;
        :np_dst = "1" ;
        :np_src = "1" ;
        :sparse_constraints = "false" ;
        :type_dst = "fv" ;
        :type_src = "fv" ;
        :version = "GenerateOfflineMap 2.6 : 2022-10-11"

[rljacob]

By contrast, the bilinear map does fill in the "method" attribute:

// global attributes:
        :Title = "TempestRemap Offline Regridding Weight Generator" ;
        :concave_dst = "false" ;
        :concave_src = "false" ;
        :domain_a = "ne30pg2_20200209.g" ;
        :domain_b = "ocean.SOwISC12to60E3r1.nomask.scrip.20230901.nc" ;
        :grid_file_dst = "ocean.SOwISC12to60E3r1.nomask.scrip.20230901.nc" ;
        :grid_file_ovr = "oa_overlap.g" ;
        :grid_file_src = "ne30pg2_20200209.g" ;
        :method = "bilin" ;
        :mono = "false" ;
        :nobubble = "false" ;
        :noconserve = "false" ;
        :nocorrectareas = "false" ;
        :np_dst = "1" ;
        :np_src = "1" ;
        :sparse_constraints = "false" ;
        :type_dst = "fv" ;
        :type_src = "fv" ;
        :version = "GenerateOfflineMap 2.6 : 2022-10-11"

[dmarsico1]

@rljacob Yes, the "method" attribute should be empty for a first order area-averaged map.

The "method" argument is only used for generating maps if you want to use one of the methods "bilin," "intbilin," "invdist," "intbilingb," "delaunay" or any of the other methods listed in the block of code starting at line 223 of "GenerateOfflineMap.cpp." If one of these methods is used, then the "methods" attribute will not be blank (as in the case for bilinear remapping shown here).

[rljacob]

I'd like to suggest that "method" have "aavmap" or similar added for that case. Asking downstream users of TR-generated maps to remember "blank means area-averaged map" is asking to much.