# Discover tiles and coverage

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`.

Coverage is geometric tile-index coverage rather than a data-quality measure.

## Example area

## Selected tiles

    tiles <- bluertopo_tiles(
      real_aoi,
      resolution = "native",
      coverage = "warn",
      quiet = TRUE
    )

## Coverage diagnostics

## AOI and selected footprints

## Coverage fractions

The selected tile table includes shortened GeoTIFF and RAT URLs from the current catalog records.