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First CRAN submission.
Commit to rename of kissfft.hh to kissfft.h.
geodesic_nn() - Find k nearest neighbors using geodesic
distances on the WGS84 ellipsoid. Uses a vantage-point tree for
efficient searching.geodesic_nn_radius() - Find all neighbors within a
specified radius (meters)Both functions build an optimized spatial index for fast repeated queries.
geocoords_to_mgrs() and
geocoords_to_utm() which were producing garbled output.
These functions have been removed as they duplicated
mgrs_fwd() and utm_fwd() functionality. Use
those functions instead.vignette("geodesics") with a new section on
nearest neighbor searchgeodesic_intersect() - Find the closest intersection of
two geodesics defined by starting points and azimuthsgeodesic_intersect_segment() - Find the intersection of
two geodesic segments defined by their endpointsgeodesic_intersect_next() - Find the next closest
intersection from a known intersection pointgeodesic_intersect_all() - Find all intersections
within a maximum distanceAll functions return the displacement along each geodesic, a coincidence indicator, and the latitude/longitude of the intersection point.
vignette("geodesics") with a new section on
geodesic intersectionsdms_decode() - Parse DMS strings in various formats to
decimal degreesdms_decode_latlon() - Parse coordinate pairs with
automatic hemisphere handlingdms_decode_angle() - Parse angles (no hemisphere
designators)dms_decode_azimuth() - Parse azimuths (E/W allowed,
result in [-180, 180])dms_encode() - Format decimal degrees to DMS strings
with configurable precisiondms_split() - Split angles into degree, minute, second
componentsdms_combine() - Combine d/m/s components to decimal
degreesvignette("grid-reference-systems") with
GeoCoords and DMS sectionsgeocoords_parse() - Parse coordinate strings in various
formats (MGRS, UTM, DMS)geocoords_to_mgrs() - Convert lat/lon to MGRS
stringsgeocoords_to_utm() - Convert lat/lon to UTM
stringsalbers_fwd() and albers_rev() - Albers
Equal Area conic projection
lon0 parameterpolarstereo_fwd() and polarstereo_rev() -
Polar Stereographic projection
northp parameter is vectorizedtm_fwd() and tm_rev() - Transverse
Mercator projection with user-defined central meridian and scale factor
(series approximation, fast, ~5nm accuracy)tm_exact_fwd() and tm_exact_rev() -
Transverse Mercator with exact formulation (slower but accurate
everywhere)lon0 parameterazeq_fwd() and azeq_rev() are now fully
vectorized on lon0 and lat0 parameters,
allowing different projection centers for each point. Output now
includes lon0 and lat0 columns to track which
center was used.vignette("grid-reference-systems") - Detailed guide to
MGRS, Geohash, GARS, and Georef with Southern Hemisphere and Antarctic
examplesvignette("projections") - Comprehensive coverage of
UTM/UPS, LCC, Cassini-Soldner, Gnomonic, Azimuthal Equidistant, and
OSGBvignette("geodesics") - Distance, bearing, path, and
polygon area calculations with Antarctic examplesvignette("local-coordinates") - Geocentric (ECEF),
Local Cartesian (ENU), and ellipsoid properties for GNSS and
surveyinggeodesic_direct_fast(),
geodesic_inverse_fast(),
geodesic_path_fast()geodesic_distance_fast(),
geodesic_distance_matrix_fast()localcartesian_fwd() - Convert geographic to local
East-North-Up coordinateslocalcartesian_rev() - Convert local coordinates back
to geographiccassini_fwd() - Convert geographic to Cassini-Soldner
projectioncassini_rev() - Convert back to geographicgnomonic_fwd() - Convert geographic to gnomonic
projectiongnomonic_rev() - Convert back to geographicosgb_fwd() - Convert WGS84 to OSGB grid
coordinatesosgb_rev() - Convert OSGB grid to WGS84osgb_gridref() - Convert to alphanumeric grid reference
stringsosgb_gridref_rev() - Parse grid reference stringsgeocentric_fwd() - Convert geodetic (lon/lat/height) to
geocentric (X/Y/Z) coordinatesgeocentric_rev() - Convert geocentric (X/Y/Z) to
geodetic coordinatesellipsoid_params() - Get WGS84 ellipsoid parameters (a,
f, b, e², etc.)ellipsoid_circle() - Get circle of latitude radius and
meridian distanceellipsoid_latitudes() - Convert to auxiliary latitudes
(parametric, geocentric, rectifying, authalic, conformal,
isometric)ellipsoid_latitudes_inv() - Convert auxiliary latitudes
back to geographicellipsoid_curvature() - Get meridional and transverse
radii of curvatureazeq_fwd() - Convert geographic to azimuthal
equidistant projectionazeq_rev() - Convert azimuthal equidistant to
geographic coordinatesgars_fwd() - Convert geographic coordinates to GARS
codesgars_rev() - Convert GARS codes to geographic
coordinatesgeoref_fwd() - Convert geographic coordinates to Georef
codesgeoref_rev() - Convert Georef codes to geographic
coordinatesrhumb_direct() - Solve the direct rhumb problem (find
destination given start, azimuth, distance)rhumb_inverse() - Solve the inverse rhumb problem (find
distance and azimuth between two points)rhumb_path() - Generate points along a rhumb line
between two pointsrhumb_line() - Generate points at specified distances
along a rhumb linerhumb_distance() - Compute pairwise rhumb
distancesrhumb_distance_matrix() - Compute rhumb distance matrix
between sets of pointslcc_fwd() - Convert geographic coordinates to LCC
projected coordinateslcc_rev() - Convert LCC coordinates back to
geographicgeohash_fwd() - Convert geographic coordinates to
Geohash stringsgeohash_rev() - Convert Geohash strings back to
coordinates with resolution informationgeohash_resolution() - Get lat/lon resolution for a
given Geohash lengthgeohash_length() - Find minimum length needed for
desired precisiongeodesic_direct() - Solve the direct geodesic problem
(find destination given start, azimuth, distance)geodesic_inverse() - Solve the inverse geodesic problem
(find distance and azimuths between two points)geodesic_path() - Generate points along a geodesic path
between two pointsgeodesic_line() - Generate points at specified
distances along a geodesic from a starting pointgeodesic_distance() - Compute pairwise geodesic
distancesgeodesic_distance_matrix() - Compute distance matrix
between sets of pointspolygon_area() - Compute geodesic polygon area and
perimeter on WGS84 ellipsoidpolygon_area_cumulative() - Compute cumulative
area/perimeter as vertices are addedutmups_fwd() - Convert geographic coordinates to
UTM/UPS with full metadatautmups_rev() - Convert UTM/UPS coordinates back to
geographicmgrs_rev() now returns 12 columns including:
mgrs_fwd() - Convert coordinates to MGRSmgrs_rev() - Convert MGRS to coordinatesThese binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.