Package index • hexify

Core

Create grids and assign points to cells

hex_grid(): Create a Hexagonal Grid Specification
hex9_warp_download(): Download Hex9's Warp Field
hexify(): Assign Hexagonal DGGS Cell IDs to Geographic Points
hexify_assign(): Assign Hex Cells ('ISEA3H', Aperture 3) for lon/lat
`$`(<HexGridInfo>) n_cells(<HexGridInfo>) names(<HexGridInfo>) show(<HexGridInfo>) summary(<HexGridInfo>) print(<hexify_grid_summary>) as.list(<HexGridInfo>) st_as_sf(<HexGridInfo>) st_crs(<HexGridInfo>) plot(<HexGridInfo>,<missing>): HexGridInfo Class
grid_info(<HexData>) cells(<HexData>) n_cells(<HexData>) nrow(<HexData>) ncol(<HexData>) dim(<HexData>) names(<HexData>) `$`(<HexData>) `$<-`(<HexData>) `[`(<HexData>) `[[`(<HexData>) `[[<-`(<HexData>,<ANY>,<missing>) show(<HexData>) summary(<HexData>) print(<hexify_data_summary>) as.data.frame(<HexData>) as.list(<HexData>) as_tibble(<HexData>) st_as_sf(<HexData>) st_crs(<HexData>) plot(<HexData>,<missing>): HexData Class

Working with Results

Extract and convert HexData

grid_info(): Get Grid Specification
cells(): Get Cell IDs
n_cells(): Get Number of Cells
is_hex_grid(): Check If an Object Is a HexGridInfo
is_hex_data(): Check If an Object Is a HexData
hex_summarize(): Summarize Data by Hex Cell
hex_smooth(): Smooth Cell Values Over Neighbouring Cells
hex_aggregate(): Aggregate Cell Values to a Coarser Resolution
hex_zonal(): Zonal Statistics for Hex Cells
hex_extract(): Extract Raster Values at Hex Cell Centers

Grid Generation

Create grids over regions

grid_rect(): Generate a Rectangular Grid of Hexagons
grid_global(): Generate a Global Hexagon Grid
grid_clip(): Clip Hexagon Grid to Polygon Boundary
cell_to_sf(): Convert Cell IDs to sf Polygons
lonlat_to_cell(): Convert Longitude/Latitude to Cell ID
cell_to_lonlat(): Convert Cell ID to Longitude/Latitude
get_parent(): Get Parent Cell
get_children(): Get Children Cells
get_siblings(): Sibling Cells

Cell Operations

Relations between cells and cell sets

get_neighbors(): Get Neighboring Cells
hex_distance(): Grid Distance Between Cells
is_pentagon(): Detect Pentagon Cells
hex_compact(): Compact Hex Cells
hex_uncompact(): Uncompact Hex Cells
hex_sample(): Random Points Inside Cells

H3 Interoperability

Cross-grid mapping and per-cell area

h3_crosswalk(): Crosswalk Between ISEA and H3 Cell IDs
cell_area(): Compute Per-Cell Area in km²
import_h3(): Import External H3 Cell IDs into hexify
dggrs_definition(): Definition of a Grid as a Discrete Global Grid Reference System

Cell Metrics

Shape and spacing of a grid’s cells

cell_metrics(): Shape Metrics of Cells: Area, Perimeter and Compactness
wall_metrics(): Spacing Metrics of Neighbouring Cells: Wall Length, Centre Distance and Cell Wall Midpoint Ratio
projection_distortion(): Distortion of a Grid's Face Projection
projection_stages(): Points Through the Steps of Snyder's Projection

Visualization

Plotting functions

hexify_heatmap(): Create a ggplot2 Visualization of Hexagonal Grid Cells
plot_grid(): Plot Hexagonal Grid Clipped to a Polygon Boundary
plot_world(): Quick World Map Plot
net_layout(): Lay Out the Faces of a Grid's Solid in the Plane
net_project(): Place Points on a Net Layout
net_cells(): The Parts of Cells on a Net Layout
hex_rays(): Ray Glyphs for Cell Values
hex_triangles(): The Triangles of Cells Towards Each Neighbour
hex_globe(): Interactive Globe of a Grid
hex_globe_png(): Save a Globe as a PNG Image
hexify_world: Simplified World Map
globe_centers: Globe Center Presets
hex_browse(): Interactive Hex Map

dggridR Compatibility

Interoperability with dggridR

as_dggrid() format(<dggs>) print(<dggs>): Convert hexify Grid to 'dggridR'-compatible Grid Object
from_dggrid(): Convert 'dggridR' Grid Object to hexify_grid
dggrid_is_compatible(): Validate 'dggridR' Grid Compatibility with hexify
dggrid_43h_sequence(): Create DGGRID 43H Aperture Sequence
hexify_grid() format(<hexify_grid>) print(<hexify_grid>): Create a Legacy Grid Specification
dgearthstat(): Get Grid Statistics for Whole-Body Coverage
dgverify(): Verify Grid Object
hexify_compare_resolutions(): Compare Grid Resolutions

Low-Level API

Direct access to projection and coordinate transforms

hexify_forward(): Forward Face Projection
hexify_forward_to_face(): Forward Projection to Specific Face
hexify_inverse(): Inverse Face Projection
hexify_which_face(): Determine Which Face Contains a Point
hexify_build_icosa(): Set the Default Icosahedron Orientation
hexify_face_centers(): Get Face Centers of a Solid
hexify_grid_rect(): Generate a Rectangular Grid of Hexagon Polygons
hexify_grid_global(): Generate a Global Grid of Hexagon Polygons
hexify_grid_to_cell(): Convert Longitude/Latitude to Cell ID Using a Grid Object
hexify_grid_cell_to_lonlat(): Convert Cell ID to Longitude/Latitude Using a Grid Object
hex_corners_to_sf(): Build an sf POLYGON from Six (lon, lat) Corner Pairs
dg_closest_res_to_area(): Find Closest Resolution for Target Cell Area
hexify_area_to_eff_res(): Convert Area to Effective Resolution
hexify_eff_res_to_area(): Convert Effective Resolution to Area
hexify_eff_res_to_resolution(): Convert Effective Resolution to Index Resolution
hexify_resolution_to_eff_res(): Convert Index Resolution to Effective Resolution
hexify_compare_indices(): Compare Two Indices
hexify_default_index_type(): Get Default Index Type for Aperture
hexify_is_valid_index_type(): Check If Index Type Is Valid for Aperture
cell_to_index(): Convert Cell ID to Hierarchical Index String
index_to_cell(): Convert Hierarchical Index to Cell ID
hexify_get_children(): Get Children Indices
hexify_get_parent(): Get Parent Index
hexify_get_resolution(): Get Index Resolution
hexify_z7_canonical(): Get Canonical Form of Z7 Index
hexify_roundtrip_test(): Round-Trip Accuracy Test

Internal

Package internals

hexify-package: hexify: Equal-Area Hex Grids on the Snyder ISEA Icosahedron
new_hex_data(): Create a HexData Object (Internal)
extract_grid(): Extract Grid from Various Objects
calculate_resolution_for_area(): Calculate Resolution for Target Area
hexify_grid_to_HexGridInfo(): Convert Legacy hexify_grid to HexGridInfo
HexGridInfo_to_hexify_grid(): Convert HexGridInfo to Legacy hexify_grid