Avoid projection warning

[elgabbas]

Hello, I am receiving the following warning when using exactextractr with Corine land cover (CLC) data. The function works as expected (thanks!) but is there a way to avoid this warning without using supressWarnings() around the exactextractr::exact_extract functions?

How to change the projection of CLC to meet with the EPSG registry? or how to change GTIFF_SRS_SOURCE configuration option in R as implemented in this question and this question.

Here is the warning using a Linux HPC

The first warning was:
ℹ In argument: `exactextractr::exact_extract(...)`.
Caused by warning in `new_CppObject_xp()`:
! GDAL Message 1: The definition of projected CRS EPSG:3035 got from GeoTIFF keys is not the same as the one from the EPSG registry, which may cause issues during reprojection operations. Set GTIFF_SRS_SOURCE configuration option to EPSG to use official parameters (overriding the ones from GeoTIFF keys), or to GEOKEYS to use custom values from GeoTIFF keys and drop the EPSG code.

and on a Windows PC

There was 1 warning in `stopifnot()`. ℹ In argument: `exactextractr::exact_extract(...)`. 
Caused by warning in `.local()`: ! Polygons transformed to raster CRS (EPSG:NA)

Here is the CRS information of the CLC map

+proj=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000 +ellps=GRS80 +units=m +no_defs

Coordinate Reference System:
Deprecated Proj.4 representation:
 +proj=laea +lat_0=52 +lon_0=10 +x_0=4321000
+y_0=3210000 +ellps=GRS80 +units=m +no_defs 
WKT2 2019 representation:
PROJCRS["unknown",
    BASEGEOGCRS["unknown",
        DATUM["Unknown based on GRS 1980 ellipsoid",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1],
                ID["EPSG",7019]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8901]]],
    CONVERSION["unknown",
        METHOD["Lambert Azimuthal Equal Area",
            ID["EPSG",9820]],
        PARAMETER["Latitude of natural origin",52,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",10,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["False easting",4321000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",3210000,
            LENGTHUNIT["metre",1],
            ID["EPSG",8807]]],
    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]]]] 

And this is the CRS of the polygon

"PROJCRS[\"ETRS89-extended / LAEA Europe\",\n    BASEGEOGCRS[\"ETRS89\",\n        ENSEMBLE[\"European Terrestrial Reference System 1989 ensemble\",\n            MEMBER[\"European Terrestrial Reference Frame 1989\"],\n            MEMBER[\"European Terrestrial Reference Frame 1990\"],\n            MEMBER[\"European Terrestrial Reference Frame 1991\"],\n            MEMBER[\"European Terrestrial Reference Frame 1992\"],\n            MEMBER[\"European Terrestrial Reference Frame 1993\"],\n            MEMBER[\"European Terrestrial Reference Frame 1994\"],\n            MEMBER[\"European Terrestrial Reference Frame 1996\"],\n            MEMBER[\"European Terrestrial Reference Frame 1997\"],\n            MEMBER[\"European Terrestrial Reference Frame 2000\"],\n            MEMBER[\"European Terrestrial Reference Frame 2005\"],\n            MEMBER[\"European Terrestrial Reference Frame 2014\"],\n            ELLIPSOID[\"GRS 1980\",6378137,298.257222101,\n                LENGTHUNIT[\"metre\",1]],\n            ENSEMBLEACCURACY[0.1]],\n        PRIMEM[\"Greenwich\",0,\n            ANGLEUNIT[\"degree\",0.0174532925199433]],\n        ID[\"EPSG\",4258]],\n    CONVERSION[\"Europe Equal Area 2001\",\n        METHOD[\"Lambert Azimuthal Equal Area\",\n            ID[\"EPSG\",9820]],\n        PARAMETER[\"Latitude of natural origin\",52,\n            ANGLEUNIT[\"degree\",0.0174532925199433],\n            ID[\"EPSG\",8801]],\n        PARAMETER[\"Longitude of natural origin\",10,\n            ANGLEUNIT[\"degree\",0.0174532925199433],\n            ID[\"EPSG\",8802]],\n        PARAMETER[\"False easting\",4321000,\n            LENGTHUNIT[\"metre\",1],\n            ID[\"EPSG\",8806]],\n        PARAMETER[\"False northing\",3210000,\n            LENGTHUNIT[\"metre\",1],\n            ID[\"EPSG\",8807]]],\n    CS[Cartesian,2],\n        AXIS[\"northing (Y)\",north,\n            ORDER[1],\n            LENGTHUNIT[\"metre\",1]],\n        AXIS[\"easting (X)\",east,\n            ORDER[2],\n            LENGTHUNIT[\"metre\",1]],\n    USAGE[\n        SCOPE[\"Statistical analysis.\"],\n        AREA[\"Europe - European Union (EU) countries and candidates. Europe - onshore and offshore: Albania; Andorra; Austria; Belgium; Bosnia and Herzegovina; Bulgaria; Croatia; Cyprus; Czechia; Denmark; Estonia; Faroe Islands; Finland; France; Germany; Gibraltar; Greece; Hungary; Iceland; Ireland; Italy; Kosovo; Latvia; Liechtenstein; Lithuania; Luxembourg; Malta; Monaco; Montenegro; Netherlands; North Macedonia; Norway including Svalbard and Jan Mayen; Poland; Portugal including Madeira and Azores; Romania; San Marino; Serbia; Slovakia; Slovenia; Spain including Canary Islands; Sweden; Switzerland; Turkey; United Kingdom (UK) including Channel Islands and Isle of Man; Vatican City State.\"],\n        BBOX[24.6,-35.58,84.73,44.83]],\n    ID[\"EPSG\",3035]]"

This is linked to this this and (this)[https://github.com/isciences/exactextractr/issues/28] issues.

[dbaston]

! GDAL Message 1: The definition of projected CRS EPSG:3035 got from GeoTIFF keys is not the same...

This warning is coming not coming from exactextract. If you're using terra, you can set GDAL config options using setGDALconfig (https://rspatial.github.io/terra/reference/gdal.html)

Polygons transformed to raster CRS (EPSG:NA)

If you want to avoid the message, you can transform polygons to the raster CRS using st_transform before calling exact_extract.

[elgabbas]

Thanks @dbaston for sharing this info. The first warning was not related to exactextractr. I used the setGDALconfig to switch this warning off. I will see if I need to reproject the polygons.