library(sf) > library(sp) > library(raster) > shp <- read_sf("E:/waterconstraint/LoessPlateauRegion/LoessPlateauRegion.shp") > r<-raster("E:/waterconstraint/GIMMS_NDVI/MonthMax/1982-01-01.tif") > crs(shp) [1] "PROJCRS[\"WGS_1984_Albers\",\n BASEGEOGCRS[\"WGS 84\",\n DATUM[\"World Geodetic System 1984\",\n ELLIPSOID[\"WGS 84\",6378137,298.257223563,\n LENGTHUNIT[\"metre\",1]],\n ID[\"EPSG\",6326]],\n PRIMEM[\"Greenwich\",0,\n ANGLEUNIT[\"Degree\",0.0174532925199433]]],\n CONVERSION[\"unnamed\",\n METHOD[\"Albers Equal Area\",\n ID[\"EPSG\",9822]],\n PARAMETER[\"Latitude of false origin\",0,\n ANGLEUNIT[\"Degree\",0.0174532925199433],\n ID[\"EPSG\",8821]],\n PARAMETER[\"Longitude of false origin\",105,\n ANGLEUNIT[\"Degree\",0.0174532925199433],\n ID[\"EPSG\",8822]],\n PARAMETER[\"Latitude of 1st standard parallel\",25,\n ANGLEUNIT[\"Degree\",0.0174532925199433],\n ID[\"EPSG\",8823]],\n PARAMETER[\"Latitude of 2nd standard parallel\",47,\n ANGLEUNIT[\"Degree\",0.0174532925199433],\n ID[\"EPSG\",8824]],\n PARAMETER[\"Easting at false origin\",4000000,\n LENGTHUNIT[\"metre\",1],\n ID[\"EPSG\",8826]],\n PARAMETER[\"Northing at false origin\",0,\n LENGTHUNIT[\"metre\",1],\n ID[\"EPSG\",8827]]],\n CS[Cartesian,2],\n AXIS[\"(E)\",east,\n ORDER[1],\n LENGTHUNIT[\"metre\",1,\n ID[\"EPSG\",9001]]],\n AXIS[\"(N)\",north,\n ORDER[2],\n LENGTHUNIT[\"metre\",1,\n ID[\"EPSG\",9001]]]]" > crs(r) Coordinate Reference System: Deprecated Proj.4 representation: +proj=longlat +datum=WGS84 +no_defs WKT2 2019 representation: GEOGCRS["unknown", DATUM["World Geodetic System 1984", ELLIPSOID["WGS 84",6378137,298.257223563, LENGTHUNIT["metre",1]], ID["EPSG",6326]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8901]], CS[ellipsoidal,2], AXIS["longitude",east, ORDER[1], ANGLEUNIT["degree",0.0174532925199433, ID["EPSG",9122]]], AXIS["latitude",north, ORDER[2], ANGLEUNIT["degree",0.0174532925199433, ID["EPSG",9122]]]] > shp_proj <- st_transform(shp,crs = (r) + r_crop <- crop(r,shp_proj) Error: unexpected symbol in: "shp_proj <- st_transform(shp,crs = (r) r_crop"

根据您所展示的代码，出现了一个错误：在 crop(r,shp_proj) 中有一个意外的符号。我建议您将此行代码改为：r_crop <- crop(r,shp_proj)。此外，这对话似乎涉及到一些 GIS 操作和空间参考系统的知识，您是否需要更详细的解释或其他帮助？