我在使用
rasterterraR <- raster::raster(CLC_Tiff)
警告信息： 在 new_CppObject_xp(fields$.module, fields$.pointer, ...) 中： GDAL 消息 1：从 GeoTIFF 密钥获取的投影 CRS EPSG:3035 的定义与来自 EPSG 注册表的定义不同，这可能会在重投影操作期间导致问题。将 GTIFF_SRS_SOURCE 配置选项设置为 EPSG 以使用官方参数（覆盖 GeoTIFF 键中的参数），或设置为 GEOKEYS 以使用 GeoTIFF 键中的自定义值并删除 EPSG 代码。
这是投影
raster::projection(R)
[1] "+proj=laea +lat_0=52 +lon_0=10 +x_0=4321000 +y_0=3210000 +ellps=GRS80 +units=m +no_defs"
对于 terra 来说也是如此：
R <- terra::rast(CLC_Tiff, crs = "EPSG:3035")
Warning message:
In new_CppObject_xp(fields$.module, fields$.pointer, ...) :
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.
terra::crs(R)
[1] "PROJCRS[\"ETRS89-extended / LAEA Europe\",\n BASEGEOGCRS[\"ETRS89\",\n DATUM[\"European Terrestrial Reference System 1989\",\n ELLIPSOID[\"GRS 1980\",6378137,298.257222101004,\n LENGTHUNIT[\"metre\",1]]],\n PRIMEM[\"Greenwich\",0,\n ANGLEUNIT[\"degree\",0.0174532925199433]],\n ID[\"EPSG\",4258]],\n CONVERSION[\"Lambert Azimuthal Equal Area\",\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[\"(E)\",east,\n ORDER[1],\n LENGTHUNIT[\"metre\",1]],\n AXIS[\"(N)\",north,\n ORDER[2],\n LENGTHUNIT[\"metre\",1]],\n ID[\"EPSG\",3035]]"
原则上我可以在函数周围使用
suppressWarnings()问题在于该文件有一个 CRS，其中包含 EPSG 代码和一堆参数。这些参数与 GDAL 使用的数据库中相同 EPSG 代码的参数不匹配。
这可能是因为 EPSG 数据库更改了一个或多个参数。正如 SamR 指出的，这可能只是名称，因此不会影响任何东西。如果代码确实引用了一组不同的参数，那将是非常糟糕的。你可以比较一下
crs("EPSG:3035")
# [1] "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; Türkiye (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]]"
terra::crs(R)
#[1] "PROJCRS[\"ETRS89-extended / LAEA Europe\",\n BASEGEOGCRS[\"ETRS89\",\n DATUM[\"European Terrestrial Reference System 1989\",\n ELLIPSOID[\"GRS 1980\",6378137,298.257222101004,\n LENGTHUNIT[\"metre\",1]]],\n PRIMEM[\"Greenwich\",0,\n ANGLEUNIT[\"degree\",0.0174532925199433]],\n ID[\"EPSG\",4258]],\n CONVERSION[\"Lambert Azimuthal Equal Area\",\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[\"(E)\",east,\n ORDER[1],\n LENGTHUNIT[\"metre\",1]],\n AXIS[\"(N)\",north,\n ORDER[2],\n LENGTHUNIT[\"metre\",1]],\n ID[\"EPSG\",3035]]"