terrainr 0.5.0

(Note: this is a pre-release to get a Zenodo DOI; it may not match the version published to CRAN)

• New features:
  • A new function, make_manifest, now helps automate the import of terrain
    and imagery to Unity. It fully replaces raster_to_raw_tiles (see
    Deprecations below). Documentation updates are forthcoming.
• Deprecations:
  • raster_to_raw_tiles is now deprecated and will be removed in a future
    release (no earlier than 2022). Use make_manifest instead.
  • The method get_tiles.list is now deprecated and will be removed in a
    future release (unexported in Fall 2021, removed no earlier than 2022).
    Convert your list to an sf object instead.
  • The bbox argument to hit_national_map_api is now documented as
    "An object from [sf::st_bbox]." This is a change from the earlier options
    of a length 2 list or terrainr_bounding_box object. Those methods are
    currently still supported, but undocumented; they will be removed in a
    future release (no earlier than 2022).
• Improvements and bug fixes:
  • get_tiles no longer mangles data with projected coordinates (via a
    fix to the internal function split_bbox). If for some reason you want
    the old behavior back, set the new argument projected to FALSE while
    providing projected data.
  • The documentation for add_bbox_buffer and set_bbox_side_length now
    specifies that they should only be used with geographic coordinate
    systems. If you use these functions with projected data, they will warn;
    this may be upgraded to an error in future versions.
  • The README images are now of beautiful Hyampom, California, a somewhat
    more appealing vista than the original Mt Marcy scene.
  • The "Import to Unity" vignette has been rewritten to use make_manifest, as
    has the overview vignette and other documentation.
  • Typos in the message merge_rasters gives when using the fallback method
    have been fixed.
  • merge_rasters gains an argument force_fallback which, if TRUE, will
    use the older, slower method for merging tiles. This is not recommended,
    but is useful for testing.
• Internal changes:
  • The slow removal of all terrainr_* custom classes marches on! These
    classes should no longer be present in any user-facing, non-deprecated
    code; the only functions still relying on custom classes are internal
    utilities and the split_bbox function responsible for tiling get_tiles
    requests.
  • split_bbox should now run faster, particularly for large tile sets, as
    some nested loops have been vectorized.
  • Improvements to test coverage and CI.