Function reference • geos

Create and Export GEOS Geometry Vectors Functions that read and write GEOS geometry to common formats.
`geos_read_wkt()` `geos_write_wkt()` `geos_read_wkb()` `geos_write_wkb()` `geos_read_hex()` `geos_write_hex()` `geos_read_xy()` `geos_write_xy()`	Read and write well-known text
`as_geos_geometry()`	Create GEOS Geometry Vectors
`geos_empty()` `as_geos_type_id()`	Create empty geometries
`geos_make_point()` `geos_make_linestring()` `geos_make_polygon()` `geos_make_collection()`	Create geometries from vectors of coordinates
`plot(<geos_geometry>)`	Plot GEOS geometries
Geometry operators Functions that operate on one or more geometry vectors
`geos_area()` `geos_length()` `geos_x()` `geos_y()` `geos_z()` `geos_xmin()` `geos_ymin()` `geos_xmax()` `geos_ymax()` `geos_minimum_clearance()` `geos_is_empty()` `geos_is_simple()` `geos_is_ring()` `geos_has_z()` `geos_is_closed()` `geos_type_id()` `geos_type()` `geos_precision()` `geos_srid()` `geos_num_coordinates()` `geos_num_geometries()` `geos_num_interior_rings()` `geos_num_rings()` `geos_dimension()` `geos_coordinate_dimension()` `geos_is_clockwise()`	Extract information from a GEOS geometry
`geos_centroid()` `geos_boundary()` `geos_minimum_width()` `geos_minimum_clearance_line()` `geos_minimum_rotated_rectangle()` `geos_minimum_bounding_circle()` `geos_unary_union()` `geos_coverage_union()` `geos_point_on_surface()` `geos_node()` `geos_make_valid()` `geos_unique_points()` `geos_reverse()` `geos_merge_lines()` `geos_build_area()` `geos_envelope()` `geos_convex_hull()` `geos_point_start()` `geos_point_end()` `geos_clone()` `geos_set_srid()` `geos_point_n()` `geos_simplify()` `geos_simplify_preserve_topology()` `geos_set_precision()` `geos_normalize()` `geos_clip_by_rect()`	Geometry transformers
`geos_segment_intersection()` `geos_orientation_index()`	Segment operations
`geos_disjoint()` `geos_touches()` `geos_intersects()` `geos_crosses()` `geos_within()` `geos_contains()` `geos_overlaps()` `geos_equals()` `geos_equals_exact()` `geos_covers()` `geos_covered_by()` `geos_prepared_disjoint()` `geos_prepared_touches()` `geos_prepared_intersects()` `geos_prepared_crosses()` `geos_prepared_within()` `geos_prepared_contains()` `geos_prepared_contains_properly()` `geos_prepared_overlaps()` `geos_prepared_covers()` `geos_prepared_covered_by()`	Binary predicates
`geos_disjoint_matrix()` `geos_touches_matrix()` `geos_intersects_matrix()` `geos_crosses_matrix()` `geos_within_matrix()` `geos_contains_matrix()` `geos_contains_properly_matrix()` `geos_overlaps_matrix()` `geos_equals_matrix()` `geos_equals_exact_matrix()` `geos_covers_matrix()` `geos_covered_by_matrix()` `geos_disjoint_any()` `geos_touches_any()` `geos_intersects_any()` `geos_crosses_any()` `geos_within_any()` `geos_contains_any()` `geos_contains_properly_any()` `geos_overlaps_any()` `geos_equals_any()` `geos_equals_exact_any()` `geos_covers_any()` `geos_covered_by_any()`	Matrix predicates
`geos_distance()` `geos_distance_indexed()` `geos_distance_hausdorff()` `geos_distance_frechet()`	Distance calculations
`geos_project()` `geos_project_normalized()` `geos_interpolate()` `geos_interpolate_normalized()`	Linear referencing
`geos_strtree()` `geos_strtree_query()` `geos_strtree_data()` `as_geos_strtree()`	Create a GEOS STRTree
`geos_buffer()` `geos_offset_curve()` `geos_buffer_params()`	Buffer a geometry
`geos_delaunay_triangles()` `geos_delaunay_edges()` `geos_voronoi_polygons()` `geos_voronoi_edges()`	Delaunay triagulations and Voronoi diagrams
`geos_intersection()` `geos_difference()` `geos_sym_difference()` `geos_union()` `geos_shared_paths()` `geos_snap()` `geos_clearance_line_between()`	Binary geometry operators
`geos_nearest()` `geos_nearest_indexed()` `geos_nearest_hausdorff()` `geos_nearest_frechet()`	Find the closest feature
`geos_polygonize()` `geos_polygonize_valid()` `geos_polygonize_cut_edges()` `geos_polygonize_full()`	Create polygons from noded edges
`geos_relate()` `geos_relate_pattern()` `geos_relate_pattern_match()` `geos_relate_pattern_create()`	Dimensionally extended 9 intersection model
`geos_is_valid()` `geos_is_valid_detail()`	Geometry validity
`geos_geometry_n()` `geos_ring_n()`	Access child geometries
`geos_unnest()`	Unnest nested geometries
GEOS Information
`geos_version()`	GEOS version information

Reference

Create and Export GEOS Geometry Vectors

Geometry operators

GEOS Information