Changes in version 1.0.1 (2026-01-16)                  

  - Patch of missing global declaration, previously hidden by use of
    dplyr.
  - Fix typo in reference to vignette.

                 Changes in version 1.0.0 (2025-07-13)                  

  - Upgrade to major release, because himach has been mature and stable
    for quite a while.
  - Dependency upgrade: replace use of 'quiet' option.
  - Bug fixes: out-dated link in vignette, dependency on R for pipe.

                 Changes in version 0.3.2 (2023-09-20)                  

  - New graphics: Route density charts, for routes combined with
    forecasts. See the Advanced Vignette.
  - Bug fixes: package dependencies, package documentation.

                 Changes in version 0.3.1 (2022-12-05)                  

  - Bug fixes: Prettier cutting of background map at dateline.
  - Dependency upgrades

  - using edition 3 of testthat
  - removing deprecated syntax in tidyverse

                 Changes in version 0.3.0 (2022-06-09)                  

  - New graphics options: in map_routes colour lines by a flight
    frequency variable or by number of accelerations to supersonic; now
    can also plot a simple speed/distance/time/altitude profile with
    profile_routes.
  - Added a section on cache housekeeping to the advanced vignette.
  - Bug fixes: Solved map 'leakage' at dateline, and make_AP2 copes with
    vectors of airport pairs correctly now.

                 Changes in version 0.2.3 (2021-12-01)                  

  - Fixes for solaris running old GDAL: switch to storing crs_Atlantic
    etc as strings.

                 Changes in version 0.2.2 (2021-11-21)                  

  - Fixed crash when routing over very short hops (say for
    re-positioning flights).
  - (development) Bug fixes: map leakage solved, summarise_routes now
    works with 3-letter airport codes as well as 4 (though default is
    still ICAO codes, not IATA codes for airports).
  - Removed use of Travis for code coverage.

                 Changes in version 0.2.1 (2021-06-17)                  

  - Patch so that tests work ok with sf v1.0+.

                        Changes in version 0.2.0                        

  - More precise estimate of time penalty for acceleration from subsonic
    to supersonic cruise (or v.v.). Perhaps 1% difference in timings as
    a result.
  - Faster map plots, since maps are simplified (a little) now, by
    default.

                 Changes in version 0.1.2 (2021-04-30)                  

  - Tweak test for CRAN.
  - Fixed issue when using package functions without loading package.

                 Changes in version 0.1.1 (2021-04-23)                  

  - Fixing check errors on other platforms
      - Errors involving "NULL: PROJ available?" appear linked to this
        'older GDAL' issue in sf. So implemented a work-around in
        various examples and vignettes.
      - Use make_aircraft(warn = FALSE) in examples & vignettes just to
        eliminate warnings. Still think this merits a warning in normal
        use, because the default aircraft are unlikely to be fit for
        purposes beyond testing.
      - bug fix: Mach 0.84 comparison from summarise_routes now
        uses 0.84 instead of 0.85.

                 Changes in version 0.1.0 (2021-04-15)                  

  - First version targeted for CRAN release.
  - Fixes a number of bugs in the avoid-area functionality.

                        Changes in version 0.0.2                        

  - Major overhaul of the approach to smoothing from a Dijkstra-style
    route to a great-circle route, to handle the 1% of cases where the
    old approach didn't work well.
  - Further speed improvements.

                        Changes in version 0.0.1                        

  - First version using the s2 capabilities of the sf package. This
    gives more robust plotting, and a number of internal speed
    improvements.