Using /vis3/ for reading geotiff with terra::rast() now appends current drive to start of string in v1.7.65

[mikoontz-vp]

I was able to use the /vsis3/ approach to read geotiffs from an S3 bucket using {terra} v1.7.55 but this no longer appears to work on Windows for v1.7.65. It does appear to work on macOS. I'm using the latest version of R (4.3.2) and RStudio (RStudio 2023.12.0+369 "Ocean Storm" Release (33206f75bd14d07d84753f965eaa24756eda97b7, 2023-12-14) for windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) RStudio/2023.12.0+369 Chrome/116.0.5845.190 Electron/26.2.4 Safari/537.36)

Testing this requires AWS credentials to be set, as far as I know, so this example won't be reproducible but here's the output when it doesn't work (in v1.7.65):

> sev = terra::rast('/vsis3/vp-sci-grp/fire-severity/processed/landscapes/western-us/postfire_rdnbr.tif')
Error: [rast] file does not exist: C:/vsis3/vp-sci-grp/fire-severity/processed/landscapes/western-us/postfire_rdnbr.tif
In addition: Warning message:
C:/vsis3/vp-sci-grp/fire-severity/processed/landscapes/western-us/postfire_rdnbr.tif: No such file or directory (GDAL error 4) 

When it does work (in previous version of {terra}), there is no "C:" appended ahead of the "/vsis3/" piece.

Any idea what might be going on?

[rhijmans]

This may work:

f1 <- 's3://vp-sci-grp/fire-severity/processed/landscapes/western-us/postfire_rdnbr.tif'
r1 <- terra::rast(f1)

And with the change I just made, this may work again as well:

f2 <- '/vsis3/vp-sci-grp/fire-severity/processed/landscapes/western-us/postfire_rdnbr.tif'
r2 <- terra::rast(f2)

Please let me know.

[mikoontz-vp]

Hi @rhijmans -- thanks so much for the quick reply! The first approach (using the s3:// link directly) does indeed work on both macOS and Windows 11 with {terra} v1.7.65. Unfortunately, I can't test the second option because I'm not able to install a source package on my Windows machine. But it seems like I can move my workflows to just using the S3 link directly and that will be a compatible solution across systems, though it will break backward compatibility. Thanks again for the fix!

[rhijmans]

Can't you install the dev version on windows with the line below?

install.packages('terra', repos='https://rspatial.r-universe.dev')

[mikoontz-vp]

!!! I had no idea I could do this! Thanks so much for providing binaries of the dev version! It does indeed install correctly and the second approach does indeed work using {terra} v1.7.67!

I think we can safely close the issue.