[Bug] Datum <Reseau_Geodesique_Francais_Guyane_1995> not recognised (vector layers)

[jebins]

Hi,

Describe the bug
Importing a vector layer with the EPSGS:2972 - RGFG95 / UTM zone 22N projection throws an error (with v.import or v.in.ogr).

# French
WARNING: Datum <Reseau_Geodesique_Francais_Guyane_1995> non reconnu par GRASS et aucuns paramètres trouvés
# English
WARNING: Datum <Reseau_Geodesique_Francais_Guyane_1995> not recognized by GRASS and no parameters found

Importing raster layers with exactly the same projection works flawlessly.
Similar issue here: http://osgeo-org.1560.x6.nabble.com/Datum-not-recognized-by-Grass-td5423784.html

To Reproduce
Sample data provided: https://drop.infini.fr/r/pFNqYGPKvT#jXXyqe1Fbz7AAjamBsXnAHSryVNj/VuO+cuPCi5rTCk=
Steps to reproduce the behavior:

1. Create a new location (tested three different ways):
   • select the EPSG code: 2972 , or...
   • type the Proj4 string: +proj=utm +zone=22 +ellps=GRS80 +units=m +no_defs, or...
   • from the sample proj file provided in the sample data: lines.proj .
2. Create a new mapset or open the PERMANENT one.
3. Import the file lines.shp (sample data) in the mapset with v.import or v.in.ogr.

Expected behavior
Vector importation recognizes the EPSG:2972 datum.

System description

• Operating System: Ubuntu 20.04
• GRASS GIS version: 7.8.3
• QGIS 3.10.5 was used to export the sample data.
• details about further software components:
  version=7.8.3
  date=2020
  revision=exported
  build_date=2020-05-05
  build_platform=x86_64-pc-linux-gnu
  build_off_t_size=8
  libgis_revision=2020-05-05T23:27:51+00:00
  libgis_date=2020-05-05T23:27:51+00:00
  proj=6.3.1
  gdal=3.0.4
  geos=3.8.0
  sqlite=3.31.1

Additional context
g.region -p on EPSG:2972 location:

projection: 1 (UTM)
zone:       22
datum:      ** unknown (default: WGS84) **
ellipsoid:  grs80
north:      565630
south:      544685
west:       137210
east:       156595
nsres:      5
ewres:      5
rows:       4189
cols:       3877
cells:      16240753

ogrinfo on lines.shp:

INFO: Open of `lines.shp'
      using driver `ESRI Shapefile' successful.

Layer name: lines
Metadata:
  DBF_DATE_LAST_UPDATE=2020-07-17
Geometry: Line String
Feature Count: 2
Extent: (347549.897704, 534700.872755) - (364346.005321, 547907.381615)
Layer SRS WKT:
PROJCRS["RGFG95 / UTM zone 22N",
    BASEGEOGCRS["RGFG95",
        DATUM["Reseau Geodesique Francais Guyane 1995",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",4624]],
    CONVERSION["UTM zone 22N",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-51,
            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]]],
    CS[Cartesian,2],
        AXIS["(E)",east,
            ORDER[1],
            LENGTHUNIT["metre",1]],
        AXIS["(N)",north,
            ORDER[2],
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["unknown"],
        AREA["French Guiana - east of 54°W"],
        BBOX[2.17,-54,8.88,-49.45]],
    ID["EPSG",2972]]
Data axis to CRS axis mapping: 1,2
fid: Real (20.0)

Thanks for any feedback.

[neteler]

Using PR #813 I get:

GRASS 7.9.dev (nc_spm_08_grass7):~ > v.import lines.shp out=bla
Importing <lines.shp> ...
Check if OGR layer <lines> contains polygons...
 100%
Creating attribute table for layer <lines>...
Default driver / database set to:
driver: sqlite
database: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db
Importing 2 features (OGR layer <lines>)...
 100%
-----------------------------------------------------
Building topology for vector map <bla@PERMANENT>...
Registering primitives...
Reprojecting <bla>...
Reprojecting primitives ...
Building topology for vector map <bla@user1>...
Registering primitives...

i.e., the recognition now appears to work.

[jebins]

Thank you. I'll test it ASAP.

[jebins]

It works !