gcs_upload - object raster - S4 objects not supported by gcs_upload

[josemanuelgis]

Usecase:
I am trying to save a raster object as a .tif file in gcs, with these lines of code:

f <- function(input, output){
raster::writeRaster(input, filename = output, format="GTiff", overwrite=TRUE)
}

gcs_upload(ndvi, name = "raster.tif", object_function = f, predefinedAcl = "bucketLevel")

Error:

Warning message in class(file) <- c("gcs_cf", class(file)):
“Setting class(x) to multiple strings ("gcs_cf", "RasterBrick", ...); result will no longer be an S4 object”.

[MarkEdmondson1234]

Hmm the issue here is that I assume the nvdi object is S3 compatible, whereas the raster object is S4. A workaround is to write the object to a file yourself and pass in the file name. A longer term solution is to handle S4 objects in the function.

[josemanuelgis]

Thanks for your answer. Could you please specify what you mean when you comment on the function to handle S4 objects.

The lines of code that I have commented have guided me from this issues:

#91

I have a loop that generates RasterLayer objects and I need to save them as "GTiff" format in a bucket

[MarkEdmondson1234]

If your loop writes to a temporary local file, uploads that filepath via gcs_upload() then deletes the temporary local file it should work.

[josemanuelgis]

Great thank so much. Your suggestion works.