cran-comments.md

Resubmission

This is a resubmission. In this version I have:

Main API changes

• Added concentration_hotspot() as the main function for fixed-radius concentration hotspot detection. The function returns a hotspot object with hotspots and contributing_points components.
• Added method = "continuous" as the default method for concentration_hotspot(). It searches for hotspot centres that may lie between observed points, using spatial screening followed by Rcpp pair-intersection refinement. If the local subset exceeds max_refinement_points, it falls back to method = "grid".
• Added method = "observed" to concentration_hotspot(), an experimental Rcpp spatial-indexing alternative that searches observed point locations only.
• Deprecated find_highest_concentration() in favour of concentration_hotspot(). The deprecated function remains available for existing code.
• Renamed the concentration() workflow to radius_sum(), with clearer targets and reference arguments. The old concentration() function remains available as a deprecated compatibility wrapper.
• Renamed radius_sum(display_progress = ) to radius_sum(progress = ) for consistency with concentration_hotspot().
• Renamed points_in_circle() to points_within_radius(). The old function remains available as a deprecated compatibility wrapper.
• Replaced points_to_polygon() with summarise_points_by_polygon(), which more clearly describes joining point data to polygons and summarising a numeric point attribute. The old function remains available as a deprecated compatibility wrapper.
• Renamed plot_points() to map_points(). The old function remains available as a deprecated compatibility wrapper.

Function improvements

• Improved haversine() and the underlying C++ distance calculation by reducing unnecessary operations and adding stricter input checks.
• Improved points_within_radius() validation and handling of multiple centre coordinates.
• Improved radius_sum() validation, output column handling, and C++ prefiltering of incomplete reference rows.
• Updated concentration_hotspot() documentation to clarify that the function uses a grid-based search with local refinement. The search precision is controlled by cell_size and grid_precision.
• concentration_hotspot() now uses progress instead of print_progress. Since this is a new public API, the old argument is not retained there; older deprecated functions still translate their legacy progress arguments.
• Deprecated interpolate_spline() because spline interpolation is outside the main scope of the package. The function remains available for compatibility.

Mapping and visualisation

• Consolidated choropleth mapping around choropleth(), using tmap for both static and interactive output.
• Deprecated choropleth_ggplot2() in favour of choropleth().
• Moved optional visualisation packages such as mapview, tmap, ggplot2, and classInt to Suggests.

Data and documentation

• Reorganised dataset documentation by topic: Dutch spatial boundary data, KNMI stations, insurance example data, and Groningen example addresses.
• Moved knmi_historic_data() to its own function documentation file and improved validation for years, station IDs, progress handling, failed downloads, and temporary-file cleanup.
• Added tests for package dataset schemas and knmi_historic_data() input validation.
• Added a main vignette on fixed-radius concentration analysis in an applied insurance setting.
• Updated the visualisation vignette to use the current choropleth() API.
• Rewrote the README in a more applied, method-oriented style suitable for use alongside an actuarial paper.
• Updated DESCRIPTION with a more specific title and broader package description.
• Centralised small deprecated compatibility wrappers in one file.

Test environments

• local OS X install, R 4.5.3
• win-builder (devel and release)

R CMD check results

There were no ERRORs, WARNINGs or NOTEs.

Downstream dependencies

I have also run R CMD check on downstream dependencies of spatialrisk. All packages that I could install passed.