[GRASS-user] Which EPSG code for location default?

[Rich Shepard]

Applying gdalsrsinfo to a shapefile's .prj produced these results:

PROJ.4 : +proj=utm +zone=10 +datum=NAD83 +units=m +vunits=m +no_defs

OGC WKT2:2018 :
COMPOUNDCRS["NAD83 / UTM zone 10N + NAVD88 height",
     PROJCRS["NAD83 / UTM zone 10N",
         BASEGEOGCRS["NAD83",
             DATUM["North American Datum 1983",
                 ELLIPSOID["GRS 1980",6378137,298.257222101,
                     LENGTHUNIT["metre",1]],
                 ID["EPSG",6269]],
             PRIMEM["Greenwich",0,
                 ANGLEUNIT["Degree",0.0174532925199433]]],
         CONVERSION["UTM zone 10N",
             METHOD["Transverse Mercator",
                 ID["EPSG",9807]],
             PARAMETER["Latitude of natural origin",0,
                 ANGLEUNIT["Degree",0.0174532925199433],
                 ID["EPSG",8801]],
             PARAMETER["Longitude of natural origin",-123,
                 ANGLEUNIT["Degree",0.0174532925199433],
                 ID["EPSG",8802]],
             PARAMETER["Scale factor at natural origin",0.9996,
                 SCALEUNIT["unity",1],
                 ID["EPSG",8805]],
             PARAMETER["False easting",500000,
                 LENGTHUNIT["metre",1],
                 ID["EPSG",8806]],
             PARAMETER["False northing",0,
                 LENGTHUNIT["metre",1],
                 ID["EPSG",8807]],
             ID["EPSG",16010]],
         CS[Cartesian,2],
             AXIS["(E)",east,
                 ORDER[1],
                 LENGTHUNIT["metre",1,
                     ID["EPSG",9001]]],
             AXIS["(N)",north,
                 ORDER[2],
                 LENGTHUNIT["metre",1,
                     ID["EPSG",9001]]]],
     VERTCRS["NAVD88 height",
         VDATUM["North American Vertical Datum 1988"],
         CS[vertical,1],
             AXIS["gravity-related height (H)",up,
                 LENGTHUNIT["metre",1,
                     ID["EPSG",9001]]]]]

The data are the Columbia River and southern Washington state.

It's been a couple of decades since I last dug into proj and I'd appreciate
being pointed to a document that will teach me which of the several EPSG
codes above is the one to which I want to apply to PROJ_INFO in the
PERMANENT mapset.

TIA,

Rich