Package index • s2

Geography Constructors and Exporters Convert objects to and from geography vectors
`s2_lnglat()` `as_s2_lnglat()`	Create an S2 LngLat Vector
`s2_point()` `s2_point_crs()` `as_s2_point()`	Create an S2 Point Vector
`as_s2_geography()` `s2_geography()` `as_wkb(<s2_geography>)` `as_wkt(<s2_geography>)`	Create an S2 Geography Vector
`s2_geog_point()` `s2_make_line()` `s2_make_polygon()` `s2_geog_from_text()` `s2_geog_from_wkb()` `s2_as_text()` `s2_as_binary()` `s2_tessellate_tol_default()`	Create and Format Geography Vectors
Geography Transformations Functions that operate on geography vectors and return geography vectors
`s2_boundary()` `s2_centroid()` `s2_closest_point()` `s2_minimum_clearance_line_between()` `s2_difference()` `s2_sym_difference()` `s2_intersection()` `s2_union()` `s2_snap_to_grid()` `s2_simplify()` `s2_rebuild()` `s2_buffer_cells()` `s2_convex_hull()` `s2_centroid_agg()` `s2_coverage_union_agg()` `s2_rebuild_agg()` `s2_union_agg()` `s2_convex_hull_agg()` `s2_point_on_surface()`	S2 Geography Transformations
Binary Geography Predicates Functions that operate two geography vectors and return a logical vector
`s2_contains()` `s2_within()` `s2_covered_by()` `s2_covers()` `s2_disjoint()` `s2_intersects()` `s2_equals()` `s2_intersects_box()` `s2_touches()` `s2_dwithin()` `s2_prepared_dwithin()`	S2 Geography Predicates
Geography Accessors Functions that operate one or more geography vectors and return a vector of values
`s2_is_collection()` `s2_is_valid()` `s2_is_valid_detail()` `s2_dimension()` `s2_num_points()` `s2_is_empty()` `s2_area()` `s2_length()` `s2_perimeter()` `s2_x()` `s2_y()` `s2_distance()` `s2_max_distance()`	S2 Geography Accessors
`s2_bounds_cap()` `s2_bounds_rect()`	Compute feature-wise and aggregate bounds
Matrix Functions These functions return various relationships between two geography vectors
`s2_closest_feature()` `s2_closest_edges()` `s2_farthest_feature()` `s2_distance_matrix()` `s2_max_distance_matrix()` `s2_contains_matrix()` `s2_within_matrix()` `s2_covers_matrix()` `s2_covered_by_matrix()` `s2_intersects_matrix()` `s2_disjoint_matrix()` `s2_equals_matrix()` `s2_touches_matrix()` `s2_dwithin_matrix()` `s2_may_intersect_matrix()`	Matrix Functions
Linear Referencing
`s2_project()` `s2_project_normalized()` `s2_interpolate()` `s2_interpolate_normalized()`	Linear referencing
S2 Cell Utilities
`s2_cell_union()` `as_s2_geography(<s2_cell_union>)` `as_s2_cell_union()`	Create S2 Cell Union vectors
`s2_cell_union_normalize()` `s2_cell_union_contains()` `s2_cell_union_intersects()` `s2_cell_union_intersection()` `s2_cell_union_union()` `s2_cell_union_difference()` `s2_covering_cell_ids()` `s2_covering_cell_ids_agg()`	S2 cell union operators
`s2_cell()` `s2_cell_sentinel()` `s2_cell_invalid()` `as_s2_cell()` `new_s2_cell()`	Create S2 Cell vectors
`s2_cell_is_valid()` `s2_cell_debug_string()` `s2_cell_to_lnglat()` `s2_cell_center()` `s2_cell_boundary()` `s2_cell_polygon()` `s2_cell_vertex()` `s2_cell_level()` `s2_cell_is_leaf()` `s2_cell_is_face()` `s2_cell_area()` `s2_cell_area_approx()` `s2_cell_parent()` `s2_cell_child()` `s2_cell_edge_neighbour()` `s2_cell_contains()` `s2_cell_distance()` `s2_cell_max_distance()` `s2_cell_may_intersect()` `s2_cell_common_ancestor_level()` `s2_cell_common_ancestor_level_agg()`	S2 cell operators
Utility Functions
`s2_earth_radius_meters()`	Earth Constants
`s2_options()` `s2_snap_identity()` `s2_snap_level()` `s2_snap_precision()` `s2_snap_distance()`	Geography Operation Options
`s2_plot()`	Plot S2 Geographies
Example Data Useful data for testing and demonstrating s2 functions
`s2_data_example_wkt`	Example Geometries
`s2_data_tbl_countries` `s2_data_tbl_timezones` `s2_data_tbl_cities` `s2_data_countries()` `s2_data_timezones()` `s2_data_cities()`	Low-resolution world boundaries, timezones, and cities
Low-level Details Interact with spherical geometry at a low level
`wk_handle(<s2_geography>)` `s2_geography_writer()` `wk_writer(<s2_geography>)` `s2_trans_point()` `s2_trans_lnglat()` `s2_projection_plate_carree()` `s2_projection_mercator()` `s2_hemisphere()` `s2_world_plate_carree()` `s2_projection_orthographic()`	Low-level wk filters and handlers

Reference

Geography Constructors and Exporters

Geography Transformations

Binary Geography Predicates

Geography Accessors

Matrix Functions

Linear Referencing

S2 Cell Utilities

Utility Functions

Example Data

Low-level Details