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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 | Main function | Shows | Output type |
|---|---|---|---|
| Discover tiles and coverage | bluertopo_tiles() | AOI intersection, selected footprints, coverage diagnostics | Tables and footprint figure |
| Download original assets | bluertopo_download() | Verified NOAA GeoTIFF and RAT sidecar assets | Manifest tables and status figure |
| Extract elevation with terra | bluertopo() | File-backed terra object and provenance | terra summary tables and raster figure |
| Compare resolution policies | bluertopo_tiles() | Native source-resolution selection effects | Policy comparison tables and maps |
| Mixed grids and output grid | bluertopo() | SpatRasterCollection versus explicit output grid | Grid summary tables and raster figure |
| Layers and RAT metadata | bluertopo() | Elevation, uncertainty, contributor IDs, and RAT metadata | Layer/RAT tables and raster figures |
resolution selects native source tiles.
output_resolution is used only when the user explicitly
requests an output grid.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.