Download original assets

In CRAN or offline builds, network-dependent chunks are not evaluated.

This example uses BlueTopo tiles covering New York Harbor. The workflow demonstrates tile discovery, checksum-verified asset retrieval, and file-backed raster access with terra. Raster Attribute Table (RAT) sidecars are retained with the source GeoTIFF assets.

Example area

First download

manifest <- bluertopo_download(
  real_aoi,
  path = real$download_dir,
  resolution = "native",
  coverage = "fill",
  rat = TRUE,
  verify = "sha256",
  on_exists = "verify",
  progress = FALSE,
  quiet = TRUE
)

Reuse existing verified files

Manifest files

Source domain summary

Download status counts

The second call reports reused_verified for files that already exist and still match NOAA SHA-256 checksums. RAT sidecars are downloaded and verified with the GeoTIFF assets.