我有一个不同大小但尺寸和分辨率相同的栅格列表。我试图将它们拼接在一起以创建一个栅格,因为我必须计算欧几里得距离,并且当它们被分割时它没有意义。我已经阅读了有关光栅镶嵌的其他问题(例如添加names(ras_list)<-NULL
and ras_list <- ras_list[lapply(ras_list,length)>0]
),但我一直收到消息
“矩阵中的错误(unlist(ini),ncol = 2,byrow = TRUE):'数据'必须是向量类型,是'NULL'调用:do.call ... .rasterObjectFromFile -> .rasterFromRasterFile -> readIniFile -> 矩阵”
我的代码片段:
library(raster)
library(rgdal)
rnames<-list.files(path=".", pattern="*.tif")
ras_list<-list()
for (i in 1:length(rnames)){
ras_list[[i]]<-raster(rnames[i])
}
names(ras_list) <- NULL
ras_list$fun <- mean
ras_list <- ras_list[lapply(ras_list,length)>0]
rast_mosaic <- do.call(mosaic,ras_list)
writeRaster(rast_mosaic, filename="ALL_00N.tif", format="GTiff", overwrite=TRUE)
执行 typeof(ras_list[[i]]) 为每个返回 S4。谢谢你。
编辑:添加 dput(ras_list[[1]]):
new("RasterLayer"
, file = new(".RasterFile"
, name = "[hidden]/output_00N_000E_010E.tif"
, datanotation = "FLT4S"
, byteorder = "little"
, nodatavalue = -Inf
, NAchanged = FALSE
, nbands = 1L
, bandorder = "BIL"
, offset = 0L
, toptobottom = TRUE
, blockrows = 1L
, blockcols = 72001L
, driver = "gdal"
, open = FALSE
)
, data = new(".SingleLayerData"
, values = logical(0)
, offset = 0
, gain = 1
, inmemory = FALSE
, fromdisk = TRUE
, isfactor = FALSE
, attributes = list()
, haveminmax = TRUE
, min = 0
, max = 100
, band = 1L
, unit = ""
, names = "output_00N_000E_010E"
)
, legend = new(".RasterLegend"
, type = character(0)
, values = logical(0)
, color = logical(0)
, names = logical(0)
, colortable = logical(0)
)
, title = character(0)
, extent = new("Extent"
, xmin = -0.000138889
, xmax = 20.000138889
, ymin = -10.000138889
, ymax = 0.000138889
)
, rotated = FALSE
, rotation = new(".Rotation"
, geotrans = numeric(0)
, transfun = function ()
NULL
)
, ncols = 72001L
, nrows = 36001L
, crs = new("CRS"
, projargs = "+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0"
)
, history = list()
, z = list()
)