Nicolas,
1) It seems that the entry RGTAAF07UTM42S has disappeared from the
current IGNF dictionary
It is no longer in https://geodesie.ign.fr/contenu/fichiers/IGNF.xml
which is the source (actually we use a slightly older version of
IGNF.xml) from the records ingested into the PROJ database:
https://github.com/OSGeo/PROJ/blob/master/data/sql/ignf.sql
IGN is of course welcome to take over maintenance of the registry in
PROJ: cf https://github.com/OSGeo/PROJ/issues/2682
2) It seems that the geoid grid fr_ign_RAR07_bl.tif
is missing for the definition of :
REUN47GAUSSL
RGR92UTM40S
REUN47GEO
RGR92GEO
In the new ISO191111-based paradygm (which is also more or less the one
followed by the IGNF.xml file), a grid is not part of a CRS definition.
Grids can be referenced by transformations.
e.g
bin/projinfo -s IGNF:RGR92GEO -t IGNF:REUN89
Candidate operations found: 1
-------------------------------------
Operation No. 1:
DERIVED_FROM(IGNF):TSG1160, RGR92 (RESEAU GEODESIQUE DE LA REUNION 1992)
vers IGN 1989 (REUNION), unknown accuracy, ILE DE LA REUNION, at least
one grid missing
PROJ string:
+proj=pipeline
+step +proj=unitconvert +xy_in=deg +xy_out=rad
+step +inv +proj=vgridshift +grids=fr_ign_RAR07_bl.tif +multiplier=1
+step +proj=unitconvert +xy_in=rad +xy_out=deg
which directly uses the IGNF:TSG1160 transformation of IGNF.xml
3) It seems that the geoid grid fr_ign_1.tif
is missing for the definition of :
STPM50UTM21
RGSPM06GEO
STPM50GEO
RGSPM06U21
Same here:
$ bin/projinfo -s IGNF:RGSPM06GEO -t IGNF:STPM50_V
Candidate operations found: 1
-------------------------------------
Operation No. 1:
DERIVED_FROM(IGNF):TSG1156, RGSPM06 (RESEAU GEODESIQUE DE
SAINT-PIERRE-ET-MIQUELON 2006) vers DANGER 1950
(SAINT-PIERRE-ET-MIQUELON), unknown accuracy, SAINT-PIERRE-ET-MIQUELON,
at least one grid missing
PROJ string:
+proj=pipeline
+step +proj=unitconvert +xy_in=deg +xy_out=rad
+step +inv +proj=vgridshift +grids=fr_ign_ggspm06v1.tif +multiplier=1
+step +proj=unitconvert +xy_in=rad +xy_out=deg
Even
--
http://www.spatialys.com
My software is free, but my time generally not.
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