Changes in version 1.0.0 (2026-04-03)                  

New Features

  - Terrain derivatives: slope_aspect(), hillshade(), contour_lines(),
    and zonal_stats() for slope, aspect, shaded relief, contour
    generation, and general-purpose zonal statistics.

  - Flood analysis: flood_inundation() for binary inundation masks,
    flood_depth() for water depth rasters, and height_above_drainage()
    implementing the HAND model for flood susceptibility mapping.

  - Mining analysis: bench_detection() identifies flat mining benches
    adjacent to highwall faces using slope segmentation.

  - Engineering export: export_landxml() writes LandXML TIN surfaces for
    Civil 3D, Bentley OpenRoads, and Trimble. export_stl() writes STL
    meshes for 3D printing terrain models.

  - KyFromAbove counties: kfa_county_bbox() and kfa_list_counties()
    provide bounding box lookup for all 120 Kentucky counties.

  - Color ramps: change_colors(), terrain_colors(), and flood_colors()
    are now exported for use in custom visualizations.

  - has_s3_access() is now exported for use in @examplesIf guards.

Security

  - Added sanitize_filename() to prevent path traversal in cached file
    names.
  - Added validate_kfa_url() to verify download URLs originate from the
    KyFromAbove S3 bucket.
  - Added safe_download() with configurable timeout (300s default),
    retry with exponential backoff (3 attempts), and file size limits
    (500 MB default).
  - kfa_read_dem(), kfa_read_pointcloud(), and kfa_tile_index() now use
    the hardened download functions.

Documentation

  - Added CITATION.cff and .zenodo.json for DOI-based citation.
  - Added community health files: CODE_OF_CONDUCT.md, CONTRIBUTING.md,
    SECURITY.md, SUPPORT.md, ATTRIBUTION.md, CHANGELOG.md,
    DEVELOPMENT.md, DISCLAIMER.md, GOVERNANCE.md, MAINTAINERS.md,
    PRIVACY.md, RESPONSIBLE_USE.md.
  - Added GitHub issue and PR templates.

Infrastructure

  - Added Codecov integration for test coverage reporting.
  - Added Dependabot for GitHub Actions dependency updates.
  - Added CodeQL security scanning workflow.
  - Added dependency review workflow for pull requests.
  - Added stale issue/PR bot.

                 Changes in version 0.1.0 (2026-03-19)                  

  - Initial CRAN release.
  - Core analysis: terrain_change(), change_by_zone(),
    estimate_volume(), impoundment_curve(), terrain_profile(),
    boundary_terrain_profile(), classify_highwall(),
    reclamation_progress(), surface_roughness(), detect_channels(),
    pond_sedimentation().
  - KyFromAbove access: kfa_find_tiles(), kfa_tile_index(),
    kfa_read_dem(), kfa_read_pointcloud(), kfa_read_ortho(),
    kfa_stac_search().
  - Bundled sample data for examples and testing.
  - Getting started vignette.