The hardware and bandwidth for this mirror is donated by dogado GmbH, the Webhosting and Full Service-Cloud Provider. Check out our Wordpress Tutorial.
If you wish to report a bug, or if you are interested in having us mirror your free-software or open-source project, please feel free to contact us at mirror[@]dogado.de.

Resolution policies

BlueTopo tile metadata records each source tile’s native cell size. Smaller meter values mean finer source detail. In bluertopo, resolution chooses which source tiles to use; output_resolution creates a new output grid and therefore resamples.

Shortcuts

# Use every intersecting native source resolution.
bluertopo(aoi, resolution = "native")

# Prefer the finest available native source tiles.
bluertopo(aoi, resolution = "finest")

# Prefer the coarsest available native source tiles.
bluertopo(aoi, resolution = "coarsest")

# Keep all available resolutions as candidates.
bluertopo(aoi, resolution = "best_available")

Exact and nearest values

Numeric resolution values request exact native meter values. Use bluertopo_resolution() for explicit nearest-neighbor behavior.

bluertopo(aoi, resolution = 8)

bluertopo(
  aoi,
  resolution = bluertopo_resolution(
    "nearest",
    value = 10,
    tie = "finer"
  )
)

Ranges and ranks

bluertopo(
  aoi,
  resolution = bluertopo_resolution("between", min_m = 4, max_m = 16)
)

bluertopo(
  aoi,
  resolution = bluertopo_resolution("finest_n", n = 2)
)

n must be a positive whole number. Fractional values are rejected rather than silently truncated.

Coverage-oriented selection

Coverage diagnostics compare selected tile coverage against all published tile coverage intersecting the AOI. coverage = "fill" adds fallback native resolutions until the target is met or no fallback remains.

bluertopo(
  aoi,
  resolution = "finest",
  coverage = "fill",
  min_coverage = 0.95
)

policy <- bluertopo_resolution(
  "coverage",
  prefer = "finest",
  min_coverage = 0.90
)

bluertopo(aoi, resolution = policy, coverage = "fill")

For strategy = "coverage", the coverage target stored in the resolution policy is used. For other strategies, the function-level min_coverage argument is used.

Scope

Only global resolution ranking is currently implemented. scope = "local" is reserved for a future AOI-local ranking implementation and is rejected in this release instead of being accepted without effect.

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.