liblwgeom.h File Reference
This library is the generic geometry handling section of PostGIS. More...
#include <stdarg.h>#include <stdio.h>#include <stdint.h>#include "proj_api.h"
Include dependency graph for liblwgeom.h:
Go to the source code of this file.
Data Structures | |
| struct | AFFINE |
| struct | BOX3D |
| struct | GBOX |
| struct | SPHEROID |
| struct | POINT2D |
| struct | POINT3DZ |
| struct | POINT3D |
| struct | POINT3DM |
| struct | POINT4D |
| struct | POINTARRAY |
| struct | GSERIALIZED |
| struct | LWGEOM |
| struct | LWPOINT |
| struct | LWLINE |
| struct | LWTRIANGLE |
| struct | LWCIRCSTRING |
| struct | LWPOLY |
| struct | LWMPOINT |
| struct | LWMLINE |
| struct | LWMPOLY |
| struct | LWCOLLECTION |
| struct | LWCOMPOUND |
| struct | LWCURVEPOLY |
| struct | LWMCURVE |
| struct | LWMSURFACE |
| struct | LWPSURFACE |
| struct | LWTIN |
| struct | LWBOUNDINGCIRCLE |
| struct | struct_lwgeom_parser_result |
| Parser result structure: returns the result of attempting to convert (E)WKT/(E)WKB to LWGEOM. More... | |
| struct | struct_lwgeom_unparser_result |
Macros | |
| #define | ACCEPT_USE_OF_DEPRECATED_PROJ_API_H 1 |
| #define | PROJ_GEODESIC 0 |
| #define | LIBLWGEOM_VERSION "2.4.9dev" |
| liblwgeom versions More... | |
| #define | LIBLWGEOM_VERSION_MAJOR "2" |
| #define | LIBLWGEOM_VERSION_MINOR "4" |
| #define | LIBLWGEOM_GEOS_VERSION "37" |
| #define | LW_TRUE 1 |
| Return types for functions with status returns. More... | |
| #define | LW_FALSE 0 |
| #define | LW_UNKNOWN 2 |
| #define | LW_FAILURE 0 |
| #define | LW_SUCCESS 1 |
| #define | POINTTYPE 1 |
| LWTYPE numbers, used internally by PostGIS. More... | |
| #define | LINETYPE 2 |
| #define | POLYGONTYPE 3 |
| #define | MULTIPOINTTYPE 4 |
| #define | MULTILINETYPE 5 |
| #define | MULTIPOLYGONTYPE 6 |
| #define | COLLECTIONTYPE 7 |
| #define | CIRCSTRINGTYPE 8 |
| #define | COMPOUNDTYPE 9 |
| #define | CURVEPOLYTYPE 10 |
| #define | MULTICURVETYPE 11 |
| #define | MULTISURFACETYPE 12 |
| #define | POLYHEDRALSURFACETYPE 13 |
| #define | TRIANGLETYPE 14 |
| #define | TINTYPE 15 |
| #define | NUMTYPES 16 |
| #define | WKBZOFFSET 0x80000000 |
| Flags applied in EWKB to indicate Z/M dimensions and presence/absence of SRID and bounding boxes. More... | |
| #define | WKBMOFFSET 0x40000000 |
| #define | WKBSRIDFLAG 0x20000000 |
| #define | WKBBBOXFLAG 0x10000000 |
| #define | WGS84_MAJOR_AXIS 6378137.0 |
| #define | WGS84_INVERSE_FLATTENING 298.257223563 |
| #define | WGS84_MINOR_AXIS (WGS84_MAJOR_AXIS - WGS84_MAJOR_AXIS / WGS84_INVERSE_FLATTENING) |
| #define | WGS84_RADIUS ((2.0 * WGS84_MAJOR_AXIS + WGS84_MINOR_AXIS ) / 3.0) |
| #define | FLAGS_GET_Z(flags) ((flags) & 0x01) |
| Macros for manipulating the 'flags' byte. More... | |
| #define | FLAGS_GET_M(flags) (((flags) & 0x02)>>1) |
| #define | FLAGS_GET_BBOX(flags) (((flags) & 0x04)>>2) |
| #define | FLAGS_GET_GEODETIC(flags) (((flags) & 0x08)>>3) |
| #define | FLAGS_GET_READONLY(flags) (((flags) & 0x10)>>4) |
| #define | FLAGS_GET_SOLID(flags) (((flags) & 0x20)>>5) |
| #define | FLAGS_SET_Z(flags, value) ((flags) = (value) ? ((flags) | 0x01) : ((flags) & 0xFE)) |
| #define | FLAGS_SET_M(flags, value) ((flags) = (value) ? ((flags) | 0x02) : ((flags) & 0xFD)) |
| #define | FLAGS_SET_BBOX(flags, value) ((flags) = (value) ? ((flags) | 0x04) : ((flags) & 0xFB)) |
| #define | FLAGS_SET_GEODETIC(flags, value) ((flags) = (value) ? ((flags) | 0x08) : ((flags) & 0xF7)) |
| #define | FLAGS_SET_READONLY(flags, value) ((flags) = (value) ? ((flags) | 0x10) : ((flags) & 0xEF)) |
| #define | FLAGS_SET_SOLID(flags, value) ((flags) = (value) ? ((flags) | 0x20) : ((flags) & 0xDF)) |
| #define | FLAGS_NDIMS(flags) (2 + FLAGS_GET_Z(flags) + FLAGS_GET_M(flags)) |
| #define | FLAGS_GET_ZM(flags) (FLAGS_GET_M(flags) + FLAGS_GET_Z(flags) * 2) |
| #define | FLAGS_NDIMS_BOX(flags) (FLAGS_GET_GEODETIC(flags) ? 3 : FLAGS_NDIMS(flags)) |
| #define | TYPMOD_GET_SRID(typmod) ((((typmod) & 0x0FFFFF00) - ((typmod) & 0x10000000)) >> 8) |
| Macros for manipulating the 'typemod' int. More... | |
| #define | TYPMOD_SET_SRID(typmod, srid) ((typmod) = (((typmod) & 0xE00000FF) | ((srid & 0x001FFFFF)<<8))) |
| #define | TYPMOD_GET_TYPE(typmod) ((typmod & 0x000000FC)>>2) |
| #define | TYPMOD_SET_TYPE(typmod, type) ((typmod) = (typmod & 0xFFFFFF03) | ((type & 0x0000003F)<<2)) |
| #define | TYPMOD_GET_Z(typmod) ((typmod & 0x00000002)>>1) |
| #define | TYPMOD_SET_Z(typmod) ((typmod) = typmod | 0x00000002) |
| #define | TYPMOD_GET_M(typmod) (typmod & 0x00000001) |
| #define | TYPMOD_SET_M(typmod) ((typmod) = typmod | 0x00000001) |
| #define | TYPMOD_GET_NDIMS(typmod) (2+TYPMOD_GET_Z(typmod)+TYPMOD_GET_M(typmod)) |
| #define | SRID_MAXIMUM 999999 |
| Maximum allowed SRID value in serialized geometry. More... | |
| #define | SRID_USER_MAXIMUM 998999 |
| Maximum valid SRID value for the user We reserve 1000 values for internal use. More... | |
| #define | SRID_UNKNOWN 0 |
| Unknown SRID value. More... | |
| #define | SRID_IS_UNKNOWN(x) ((int)x<=0) |
| #define | SRID_DEFAULT 4326 |
| #define | __attribute__(x) |
| #define | LW_GML_IS_DIMS (1<<0) |
| Macros for specifying GML options. More... | |
| #define | LW_GML_IS_DEGREE (1<<1) |
| For GML3 only, declare that datas are lat/lon. More... | |
| #define | LW_GML_SHORTLINE (1<<2) |
| For GML3, use <LineString> rather than <Curve> for lines. More... | |
| #define | LW_GML_EXTENT (1<<4) |
| For GML2 and GML3, output only extent of geometry. More... | |
| #define | IS_DIMS(x) ((x) & LW_GML_IS_DIMS) |
| #define | IS_DEGREE(x) ((x) & LW_GML_IS_DEGREE) |
Typedefs | |
| typedef enum LWORD_T | LWORD |
| Ordinate names. More... | |
| typedef void *(* | lwallocator) (size_t size) |
| Global functions for memory/logging handlers. More... | |
| typedef void *(* | lwreallocator) (void *mem, size_t size) |
| typedef void(* | lwfreeor) (void *mem) |
| typedef void(* | lwreporter) (const char *fmt, va_list ap) __attribute__((format(printf |
| typedef void(*) typedef void(* | lwdebuglogger) (int level, const char *fmt, va_list ap) __attribute__((format(printf |
| typedef void(*) typedef void(*) voi | lwgeom_set_handlers) (lwallocator allocator, lwreallocator reallocator, lwfreeor freeor, lwreporter errorreporter, lwreporter noticereporter) |
| Install custom memory management and error handling functions you want your application to use. More... | |
| typedef void() | lwinterrupt_callback() |
| Install a callback to be called periodically during algorithm execution. More... | |
Enumerations | |
| enum | LWORD_T { LWORD_X = 0, LWORD_Y = 1, LWORD_Z = 2, LWORD_M = 3 } |
| Ordinate names. More... | |
| enum | CG_LINE_CROSS_TYPE { LINE_NO_CROSS = 0, LINE_CROSS_LEFT = -1, LINE_CROSS_RIGHT = 1, LINE_MULTICROSS_END_LEFT = -2, LINE_MULTICROSS_END_RIGHT = 2, LINE_MULTICROSS_END_SAME_FIRST_LEFT = -3, LINE_MULTICROSS_END_SAME_FIRST_RIGHT = 3 } |
| The return values of lwline_crossing_direction() More... | |
Functions | |
| const char * | lwgeom_version (void) |
| Return lwgeom version string (not to be freed) More... | |
| int | clamp_srid (int srid) |
| Return a valid SRID from an arbitrary integer Raises a notice if what comes out is different from what went in. More... | |
| void | error_if_srid_mismatch (int srid1, int srid2) |
| void | lwgeom_set_debuglogger (lwdebuglogger debuglogger) |
| void | lwgeom_request_interrupt (void) |
| Request interruption of any running code. More... | |
| void | lwgeom_cancel_interrupt (void) |
| Cancel any interruption request. More... | |
| lwinterrupt_callback * | lwgeom_register_interrupt_callback (lwinterrupt_callback *) |
| LWMPOLY * | lwgeom_as_lwmpoly (const LWGEOM *lwgeom) |
| LWMLINE * | lwgeom_as_lwmline (const LWGEOM *lwgeom) |
| LWMPOINT * | lwgeom_as_lwmpoint (const LWGEOM *lwgeom) |
| LWCOLLECTION * | lwgeom_as_lwcollection (const LWGEOM *lwgeom) |
| LWPOLY * | lwgeom_as_lwpoly (const LWGEOM *lwgeom) |
| LWLINE * | lwgeom_as_lwline (const LWGEOM *lwgeom) |
| LWPOINT * | lwgeom_as_lwpoint (const LWGEOM *lwgeom) |
| LWCIRCSTRING * | lwgeom_as_lwcircstring (const LWGEOM *lwgeom) |
| LWCURVEPOLY * | lwgeom_as_lwcurvepoly (const LWGEOM *lwgeom) |
| LWCOMPOUND * | lwgeom_as_lwcompound (const LWGEOM *lwgeom) |
| LWPSURFACE * | lwgeom_as_lwpsurface (const LWGEOM *lwgeom) |
| LWTRIANGLE * | lwgeom_as_lwtriangle (const LWGEOM *lwgeom) |
| LWTIN * | lwgeom_as_lwtin (const LWGEOM *lwgeom) |
| LWGEOM * | lwgeom_as_multi (const LWGEOM *lwgeom) |
| Create a new LWGEOM of the appropriate MULTI* type. More... | |
| LWGEOM * | lwgeom_as_curve (const LWGEOM *lwgeom) |
| Create a new LWGEOM of the appropriate CURVE* type. More... | |
| LWGEOM * | lwtin_as_lwgeom (const LWTIN *obj) |
| LWGEOM * | lwtriangle_as_lwgeom (const LWTRIANGLE *obj) |
| LWGEOM * | lwpsurface_as_lwgeom (const LWPSURFACE *obj) |
| LWGEOM * | lwmpoly_as_lwgeom (const LWMPOLY *obj) |
| LWGEOM * | lwmline_as_lwgeom (const LWMLINE *obj) |
| LWGEOM * | lwmpoint_as_lwgeom (const LWMPOINT *obj) |
| LWGEOM * | lwcollection_as_lwgeom (const LWCOLLECTION *obj) |
| LWGEOM * | lwcircstring_as_lwgeom (const LWCIRCSTRING *obj) |
| LWGEOM * | lwcompound_as_lwgeom (const LWCOMPOUND *obj) |
| LWGEOM * | lwcurvepoly_as_lwgeom (const LWCURVEPOLY *obj) |
| LWGEOM * | lwpoly_as_lwgeom (const LWPOLY *obj) |
| LWGEOM * | lwline_as_lwgeom (const LWLINE *obj) |
| LWGEOM * | lwpoint_as_lwgeom (const LWPOINT *obj) |
| LWCOLLECTION * | lwcollection_add_lwgeom (LWCOLLECTION *col, const LWGEOM *geom) |
| Appends geom to the collection managed by col. More... | |
| LWMPOINT * | lwmpoint_add_lwpoint (LWMPOINT *mobj, const LWPOINT *obj) |
| LWMLINE * | lwmline_add_lwline (LWMLINE *mobj, const LWLINE *obj) |
| LWMPOLY * | lwmpoly_add_lwpoly (LWMPOLY *mobj, const LWPOLY *obj) |
| LWPSURFACE * | lwpsurface_add_lwpoly (LWPSURFACE *mobj, const LWPOLY *obj) |
| LWTIN * | lwtin_add_lwtriangle (LWTIN *mobj, const LWTRIANGLE *obj) |
| uint8_t | gflags (int hasz, int hasm, int geodetic) |
| Construct a new flags char. More... | |
| uint32_t | gserialized_get_type (const GSERIALIZED *g) |
| Extract the geometry type from the serialized form (it hides in the anonymous data area, so this is a handy function). More... | |
| uint32_t | gserialized_max_header_size (void) |
| Returns the size in bytes to read from toast to get the basic information from a geometry: GSERIALIZED struct, bbox and type. More... | |
| uint32_t | gserialized_header_size (const GSERIALIZED *gser) |
| Returns the size in bytes of the header, from the start of the object up to the type number. More... | |
| int32_t | gserialized_get_srid (const GSERIALIZED *g) |
| Extract the SRID from the serialized form (it is packed into three bytes so this is a handy function). More... | |
| void | gserialized_set_srid (GSERIALIZED *g, int32_t srid) |
| Write the SRID into the serialized form (it is packed into three bytes so this is a handy function). More... | |
| int | gserialized_is_empty (const GSERIALIZED *g) |
| Check if a GSERIALIZED is empty without deserializing first. More... | |
| int | gserialized_has_bbox (const GSERIALIZED *gser) |
| Check if a GSERIALIZED has a bounding box without deserializing first. More... | |
| int | gserialized_has_z (const GSERIALIZED *gser) |
| Check if a GSERIALIZED has a Z ordinate. More... | |
| int | gserialized_has_m (const GSERIALIZED *gser) |
| Check if a GSERIALIZED has an M ordinate. More... | |
| int | gserialized_is_geodetic (const GSERIALIZED *gser) |
| Check if a GSERIALIZED is a geography. More... | |
| int | gserialized_get_zm (const GSERIALIZED *gser) |
| Return a number indicating presence of Z and M coordinates. More... | |
| int | gserialized_ndims (const GSERIALIZED *gser) |
| Return the number of dimensions (2, 3, 4) in a geometry. More... | |
| int | gserialized_cmp (const GSERIALIZED *g1, const GSERIALIZED *g2) |
| Return -1 if g1 is "less than" g2, 1 if g1 is "greater than" g2 and 0 if g1 and g2 are the "same". More... | |
| void | lwgeom_drop_bbox (LWGEOM *lwgeom) |
| Call this function to drop BBOX and SRID from LWGEOM. More... | |
| void | lwgeom_drop_srid (LWGEOM *lwgeom) |
| void | lwgeom_add_bbox (LWGEOM *lwgeom) |
| Compute a bbox if not already computed. More... | |
| void | lwgeom_add_bbox_deep (LWGEOM *lwgeom, GBOX *gbox) |
| Compute a box for geom and all sub-geometries, if not already computed. More... | |
| const GBOX * | lwgeom_get_bbox (const LWGEOM *lwgeom) |
| Get a non-empty geometry bounding box, computing and caching it if not already there. More... | |
| int | lwgeom_is_collection (const LWGEOM *lwgeom) |
| Determine whether a LWGEOM can contain sub-geometries or not. More... | |
| int | lwtype_is_collection (uint8_t type) |
| Determine whether a type number is a collection or not. More... | |
| int | lwtype_get_collectiontype (uint8_t type) |
| Given an lwtype number, what homogeneous collection can hold it? More... | |
| const char * | lwtype_name (uint8_t type) |
| Return the type name string associated with a type number (e.g. More... | |
| POINT4D | getPoint4d (const POINTARRAY *pa, int n) |
| int | getPoint4d_p (const POINTARRAY *pa, int n, POINT4D *point) |
| POINT3DZ | getPoint3dz (const POINTARRAY *pa, int n) |
| POINT3DM | getPoint3dm (const POINTARRAY *pa, int n) |
| int | getPoint3dz_p (const POINTARRAY *pa, int n, POINT3DZ *point) |
| int | getPoint3dm_p (const POINTARRAY *pa, int n, POINT3DM *point) |
| POINT2D | getPoint2d (const POINTARRAY *pa, int n) |
| int | getPoint2d_p (const POINTARRAY *pa, int n, POINT2D *point) |
| const POINT2D * | getPoint2d_cp (const POINTARRAY *pa, int n) |
| Returns a POINT2D pointer into the POINTARRAY serialized_ptlist, suitable for reading from. More... | |
| const POINT3DZ * | getPoint3dz_cp (const POINTARRAY *pa, int n) |
| Returns a POINT3DZ pointer into the POINTARRAY serialized_ptlist, suitable for reading from. More... | |
| const POINT4D * | getPoint4d_cp (const POINTARRAY *pa, int n) |
| Returns a POINT4D pointer into the POINTARRAY serialized_ptlist, suitable for reading from. More... | |
| void | ptarray_set_point4d (POINTARRAY *pa, int n, const POINT4D *p4d) |
| uint8_t * | getPoint_internal (const POINTARRAY *pa, int n) |
| int | ptarray_point_size (const POINTARRAY *pa) |
| POINTARRAY * | ptarray_construct (char hasz, char hasm, uint32_t npoints) |
| Construct an empty pointarray, allocating storage and setting the npoints, but not filling in any information. More... | |
| POINTARRAY * | ptarray_construct_copy_data (char hasz, char hasm, uint32_t npoints, const uint8_t *ptlist) |
| Construct a new POINTARRAY, copying in the data from ptlist. More... | |
| POINTARRAY * | ptarray_construct_reference_data (char hasz, char hasm, uint32_t npoints, uint8_t *ptlist) |
| Construct a new POINTARRAY, referencing to the data from ptlist. More... | |
| POINTARRAY * | ptarray_construct_empty (char hasz, char hasm, uint32_t maxpoints) |
| Create a new POINTARRAY with no points. More... | |
| int | ptarray_append_point (POINTARRAY *pa, const POINT4D *pt, int allow_duplicates) |
| Append a point to the end of an existing POINTARRAY If allow_duplicate is LW_FALSE, then a duplicate point will not be added. More... | |
| int | ptarray_append_ptarray (POINTARRAY *pa1, POINTARRAY *pa2, double gap_tolerance) |
| Append a POINTARRAY, pa2 to the end of an existing POINTARRAY, pa1. More... | |
| int | ptarray_insert_point (POINTARRAY *pa, const POINT4D *p, int where) |
| Insert a point into an existing POINTARRAY. More... | |
| int | ptarray_remove_point (POINTARRAY *pa, int where) |
| Remove a point from an existing POINTARRAY. More... | |
| POINTARRAY * | ptarray_addPoint (const POINTARRAY *pa, uint8_t *p, size_t pdims, uint32_t where) |
| Add a point in a pointarray. More... | |
| POINTARRAY * | ptarray_removePoint (POINTARRAY *pa, uint32_t where) |
| Remove a point from a pointarray. More... | |
| POINTARRAY * | ptarray_merge (POINTARRAY *pa1, POINTARRAY *pa2) |
| Merge two given POINTARRAY and returns a pointer on the new aggregate one. More... | |
| int | ptarray_is_closed (const POINTARRAY *pa) |
| Check for ring closure using whatever dimensionality is declared on the pointarray. More... | |
| int | ptarray_is_closed_2d (const POINTARRAY *pa) |
| int | ptarray_is_closed_3d (const POINTARRAY *pa) |
| int | ptarray_is_closed_z (const POINTARRAY *pa) |
| void | ptarray_longitude_shift (POINTARRAY *pa) |
| Longitude shift for a pointarray. More... | |
| int | ptarray_isccw (const POINTARRAY *pa) |
| void | ptarray_reverse (POINTARRAY *pa) |
| POINTARRAY * | ptarray_flip_coordinates (POINTARRAY *pa) |
| Reverse X and Y axis on a given POINTARRAY. More... | |
| POINTARRAY * | ptarray_substring (POINTARRAY *pa, double d1, double d2, double tolerance) |
| start location (distance from start / total distance) end location (distance from start / total distance) More... | |
| LWGEOM * | lwgeom_force_2d (const LWGEOM *geom) |
| Strip out the Z/M components of an LWGEOM. More... | |
| LWGEOM * | lwgeom_force_3dz (const LWGEOM *geom) |
| LWGEOM * | lwgeom_force_3dm (const LWGEOM *geom) |
| LWGEOM * | lwgeom_force_4d (const LWGEOM *geom) |
| LWGEOM * | lwgeom_simplify (const LWGEOM *igeom, double dist, int preserve_collapsed) |
| LWGEOM * | lwgeom_set_effective_area (const LWGEOM *igeom, int set_area, double area) |
| LWGEOM * | lwgeom_force_sfs (LWGEOM *geom, int version) |
| int | lwpoint_getPoint2d_p (const LWPOINT *point, POINT2D *out) |
| int | lwpoint_getPoint3dz_p (const LWPOINT *point, POINT3DZ *out) |
| int | lwpoint_getPoint3dm_p (const LWPOINT *point, POINT3DM *out) |
| int | lwpoint_getPoint4d_p (const LWPOINT *point, POINT4D *out) |
| int | lwline_add_lwpoint (LWLINE *line, LWPOINT *point, int where) |
| Add a LWPOINT to an LWLINE. More... | |
| int | lwpoly_add_ring (LWPOLY *poly, POINTARRAY *pa) |
| Add a ring, allocating extra space if necessary. More... | |
| int | lwcurvepoly_add_ring (LWCURVEPOLY *poly, LWGEOM *ring) |
| Add a ring, allocating extra space if necessary. More... | |
| int | lwcompound_add_lwgeom (LWCOMPOUND *comp, LWGEOM *geom) |
| Add a component, allocating extra space if necessary. More... | |
| LWCOMPOUND * | lwcompound_construct_from_lwline (const LWLINE *lwpoly) |
| Construct an equivalent compound curve from a linestring. More... | |
| LWCURVEPOLY * | lwcurvepoly_construct_from_lwpoly (LWPOLY *lwpoly) |
| Construct an equivalent curve polygon from a polygon. More... | |
| int | lwcollection_ngeoms (const LWCOLLECTION *col) |
| LWGEOM * | lwgeom_homogenize (const LWGEOM *geom) |
| LWGEOM * | lwcollection_getsubgeom (LWCOLLECTION *col, int gnum) |
| LWCOLLECTION * | lwcollection_extract (LWCOLLECTION *col, int type) |
| Takes a potentially heterogeneous collection and returns a homogeneous collection consisting only of the specified type. More... | |
| void | lwgeom_set_srid (LWGEOM *geom, int srid) |
| Set the SRID on an LWGEOM For collections, only the parent gets an SRID, all the children get SRID_UNKNOWN. More... | |
| BOX3D * | box3d_from_gbox (const GBOX *gbox) |
| GBOX * | box3d_to_gbox (const BOX3D *b3d) |
| void | expand_box3d (BOX3D *box, double d) |
| Expand given box of 'd' units in all directions. More... | |
| void | ptarray_free (POINTARRAY *pa) |
| void | lwpoint_free (LWPOINT *pt) |
| void | lwline_free (LWLINE *line) |
| void | lwpoly_free (LWPOLY *poly) |
| void | lwtriangle_free (LWTRIANGLE *triangle) |
| void | lwmpoint_free (LWMPOINT *mpt) |
| void | lwmline_free (LWMLINE *mline) |
| void | lwmpoly_free (LWMPOLY *mpoly) |
| void | lwpsurface_free (LWPSURFACE *psurf) |
| void | lwtin_free (LWTIN *tin) |
| void | lwcollection_free (LWCOLLECTION *col) |
| void | lwcircstring_free (LWCIRCSTRING *curve) |
| void | lwgeom_free (LWGEOM *geom) |
| void | lwpoint_release (LWPOINT *lwpoint) |
| void | lwline_release (LWLINE *lwline) |
| void | lwpoly_release (LWPOLY *lwpoly) |
| void | lwtriangle_release (LWTRIANGLE *lwtriangle) |
| void | lwcircstring_release (LWCIRCSTRING *lwcirc) |
| void | lwmpoint_release (LWMPOINT *lwpoint) |
| void | lwmline_release (LWMLINE *lwline) |
| void | lwmpoly_release (LWMPOLY *lwpoly) |
| void | lwpsurface_release (LWPSURFACE *lwpsurface) |
| void | lwtin_release (LWTIN *lwtin) |
| void | lwcollection_release (LWCOLLECTION *lwcollection) |
| void | lwgeom_release (LWGEOM *lwgeom) |
| Free the containing LWGEOM and the associated BOX. More... | |
| void | printBOX3D (BOX3D *b) |
| void | printPA (POINTARRAY *pa) |
| void | printLWPOINT (LWPOINT *point) |
| void | printLWLINE (LWLINE *line) |
| void | printLWPOLY (LWPOLY *poly) |
| void | printLWTRIANGLE (LWTRIANGLE *triangle) |
| void | printLWPSURFACE (LWPSURFACE *psurf) |
| void | printLWTIN (LWTIN *tin) |
| float | next_float_down (double d) |
| float | next_float_up (double d) |
| double | distance2d_pt_pt (const POINT2D *p1, const POINT2D *p2) |
| The old function nessecary for ptarray_segmentize2d in ptarray.c. More... | |
| double | distance2d_sqr_pt_pt (const POINT2D *p1, const POINT2D *p2) |
| double | distance2d_pt_seg (const POINT2D *p, const POINT2D *A, const POINT2D *B) |
| The old function nessecary for ptarray_segmentize2d in ptarray.c. More... | |
| double | distance2d_sqr_pt_seg (const POINT2D *p, const POINT2D *A, const POINT2D *B) |
| LWGEOM * | lwgeom_closest_line (const LWGEOM *lw1, const LWGEOM *lw2) |
| LWGEOM * | lwgeom_furthest_line (const LWGEOM *lw1, const LWGEOM *lw2) |
| LWGEOM * | lwgeom_closest_point (const LWGEOM *lw1, const LWGEOM *lw2) |
| LWGEOM * | lwgeom_furthest_point (const LWGEOM *lw1, const LWGEOM *lw2) |
| double | lwgeom_mindistance2d (const LWGEOM *lw1, const LWGEOM *lw2) |
| Function initialazing min distance calculation. More... | |
| double | lwgeom_mindistance2d_tolerance (const LWGEOM *lw1, const LWGEOM *lw2, double tolerance) |
| Function handling min distance calculations and dwithin calculations. More... | |
| double | lwgeom_maxdistance2d (const LWGEOM *lw1, const LWGEOM *lw2) |
| Function initialazing max distance calculation. More... | |
| double | lwgeom_maxdistance2d_tolerance (const LWGEOM *lw1, const LWGEOM *lw2, double tolerance) |
| Function handling max distance calculations and dfyllywithin calculations. More... | |
| double | distance3d_pt_pt (const POINT3D *p1, const POINT3D *p2) |
| double | distance3d_pt_seg (const POINT3D *p, const POINT3D *A, const POINT3D *B) |
| LWGEOM * | lwgeom_furthest_line_3d (LWGEOM *lw1, LWGEOM *lw2) |
| LWGEOM * | lwgeom_closest_line_3d (const LWGEOM *lw1, const LWGEOM *lw2) |
| LWGEOM * | lwgeom_closest_point_3d (const LWGEOM *lw1, const LWGEOM *lw2) |
| double | lwgeom_mindistance3d (const LWGEOM *lw1, const LWGEOM *lw2) |
| Function initializing 3d min distance calculation. More... | |
| double | lwgeom_mindistance3d_tolerance (const LWGEOM *lw1, const LWGEOM *lw2, double tolerance) |
| Function handling 3d min distance calculations and dwithin calculations. More... | |
| double | lwgeom_maxdistance3d (const LWGEOM *lw1, const LWGEOM *lw2) |
| Function initializing 3d max distance calculation. More... | |
| double | lwgeom_maxdistance3d_tolerance (const LWGEOM *lw1, const LWGEOM *lw2, double tolerance) |
| Function handling 3d max distance calculations and dfullywithin calculations. More... | |
| double | lwgeom_area (const LWGEOM *geom) |
| double | lwgeom_length (const LWGEOM *geom) |
| double | lwgeom_length_2d (const LWGEOM *geom) |
| double | lwgeom_perimeter (const LWGEOM *geom) |
| double | lwgeom_perimeter_2d (const LWGEOM *geom) |
| void | lwgeom_affine (LWGEOM *geom, const AFFINE *affine) |
| void | lwgeom_scale (LWGEOM *geom, const POINT4D *factors) |
| int | lwgeom_dimension (const LWGEOM *geom) |
| For an LWGEOM, returns 0 for points, 1 for lines, 2 for polygons, 3 for volume, and the max dimension of a collection. More... | |
| LWPOINT * | lwline_get_lwpoint (const LWLINE *line, int where) |
| Returns freshly allocated LWPOINT that corresponds to the index where. More... | |
| LWPOINT * | lwcircstring_get_lwpoint (const LWCIRCSTRING *circ, int where) |
| LWPOINT * | lwcompound_get_startpoint (const LWCOMPOUND *lwcmp) |
| LWPOINT * | lwcompound_get_endpoint (const LWCOMPOUND *lwcmp) |
| LWPOINT * | lwcompound_get_lwpoint (const LWCOMPOUND *lwcmp, int where) |
| double | ptarray_length_2d (const POINTARRAY *pts) |
| Find the 2d length of the given POINTARRAY (even if it's 3d) More... | |
| double | ptarray_length (const POINTARRAY *pts) |
| Find the 3d/2d length of the given POINTARRAY (depending on its dimensionality) More... | |
| double | ptarray_arc_length_2d (const POINTARRAY *pts) |
| Find the 2d length of the given POINTARRAY, using circular arc interpolation between each coordinate triple. More... | |
| int | pt_in_ring_2d (const POINT2D *p, const POINTARRAY *ring) |
| int | azimuth_pt_pt (const POINT2D *p1, const POINT2D *p2, double *ret) |
| Compute the azimuth of segment AB in radians. More... | |
| int | lwpoint_inside_circle (const LWPOINT *p, double cx, double cy, double rad) |
| void | lwgeom_reverse (LWGEOM *lwgeom) |
| Reverse vertex order of LWGEOM. More... | |
| void | lwline_reverse (LWLINE *line) |
| void | lwpoly_reverse (LWPOLY *poly) |
| void | lwtriangle_reverse (LWTRIANGLE *triangle) |
| char * | lwgeom_summary (const LWGEOM *lwgeom, int offset) |
| char * | lwpoint_to_latlon (const LWPOINT *p, const char *format) |
| int | lwgeom_startpoint (const LWGEOM *lwgeom, POINT4D *pt) |
| void | lwgeom_force_clockwise (LWGEOM *lwgeom) |
| Ensure the outer ring is clockwise oriented and all inner rings are counter-clockwise. More... | |
| void | lwpoly_force_clockwise (LWPOLY *poly) |
| void | lwtriangle_force_clockwise (LWTRIANGLE *triangle) |
| int | lwgeom_is_clockwise (LWGEOM *lwgeom) |
| Check clockwise orientation on LWGEOM polygons. More... | |
| int | lwpoly_is_clockwise (LWPOLY *poly) |
| int | lwtriangle_is_clockwise (LWTRIANGLE *triangle) |
| void | interpolate_point4d (POINT4D *A, POINT4D *B, POINT4D *I, double F) |
| Find interpolation point I between point A and point B so that the len(AI) == len(AB)*F and I falls on AB segment. More... | |
| void | lwgeom_longitude_shift (LWGEOM *lwgeom) |
| LWGEOM * | lwgeom_wrapx (const LWGEOM *lwgeom, double cutx, double amount) |
| wrap geometry on given cut x value More... | |
| int | lwgeom_needs_bbox (const LWGEOM *geom) |
| Check whether or not a lwgeom is big enough to warrant a bounding box. More... | |
| int | lwgeom_count_vertices (const LWGEOM *geom) |
| Count the total number of vertices in any LWGEOM. More... | |
| int | lwgeom_count_rings (const LWGEOM *geom) |
| Count the total number of rings in any LWGEOM. More... | |
| int | lwgeom_has_srid (const LWGEOM *geom) |
| Return true or false depending on whether a geometry has a valid SRID set. More... | |
| int | lwgeom_is_empty (const LWGEOM *geom) |
| Return true or false depending on whether a geometry is an "empty" geometry (no vertices members) More... | |
| int | lwgeom_is_closed (const LWGEOM *geom) |
| Return true or false depending on whether a geometry is a linear feature that closes on itself. More... | |
| int | lwgeom_dimensionality (LWGEOM *geom) |
| Return the dimensionality (relating to point/line/poly) of an lwgeom. More... | |
| char | lwgeom_same (const LWGEOM *lwgeom1, const LWGEOM *lwgeom2) |
| geom1 same as geom2 iff More... | |
| char | ptarray_same (const POINTARRAY *pa1, const POINTARRAY *pa2) |
| char | lwpoint_same (const LWPOINT *p1, const LWPOINT *p2) |
| char | lwline_same (const LWLINE *p1, const LWLINE *p2) |
| char | lwpoly_same (const LWPOLY *p1, const LWPOLY *p2) |
| char | lwtriangle_same (const LWTRIANGLE *p1, const LWTRIANGLE *p2) |
| char | lwcollection_same (const LWCOLLECTION *p1, const LWCOLLECTION *p2) |
| check for same geometry composition More... | |
| char | lwcircstring_same (const LWCIRCSTRING *p1, const LWCIRCSTRING *p2) |
| LWGEOM * | lwgeom_clone (const LWGEOM *lwgeom) |
| Clone LWGEOM object. More... | |
| LWGEOM * | lwgeom_clone_deep (const LWGEOM *lwgeom) |
| Deep clone an LWGEOM, everything is copied. More... | |
| LWPOINT * | lwpoint_clone (const LWPOINT *lwgeom) |
| POINTARRAY * | ptarray_clone_deep (const POINTARRAY *ptarray) |
| Deep clone a pointarray (also clones serialized pointlist) More... | |
| LWPOINT * | lwpoint_construct (int srid, GBOX *bbox, POINTARRAY *point) |
| LWMPOINT * | lwmpoint_construct (int srid, const POINTARRAY *pa) |
| LWLINE * | lwline_construct (int srid, GBOX *bbox, POINTARRAY *points) |
| LWCIRCSTRING * | lwcircstring_construct (int srid, GBOX *bbox, POINTARRAY *points) |
| LWPOLY * | lwpoly_construct (int srid, GBOX *bbox, uint32_t nrings, POINTARRAY **points) |
| LWCURVEPOLY * | lwcurvepoly_construct (int srid, GBOX *bbox, uint32_t nrings, LWGEOM **geoms) |
| LWTRIANGLE * | lwtriangle_construct (int srid, GBOX *bbox, POINTARRAY *points) |
| LWCOLLECTION * | lwcollection_construct (uint8_t type, int srid, GBOX *bbox, uint32_t ngeoms, LWGEOM **geoms) |
| LWGEOM * | lwgeom_construct_empty (uint8_t type, int srid, char hasz, char hasm) |
| LWPOINT * | lwpoint_construct_empty (int srid, char hasz, char hasm) |
| LWLINE * | lwline_construct_empty (int srid, char hasz, char hasm) |
| LWPOLY * | lwpoly_construct_empty (int srid, char hasz, char hasm) |
| LWCURVEPOLY * | lwcurvepoly_construct_empty (int srid, char hasz, char hasm) |
| LWCIRCSTRING * | lwcircstring_construct_empty (int srid, char hasz, char hasm) |
| LWCOMPOUND * | lwcompound_construct_empty (int srid, char hasz, char hasm) |
| LWTRIANGLE * | lwtriangle_construct_empty (int srid, char hasz, char hasm) |
| LWMPOINT * | lwmpoint_construct_empty (int srid, char hasz, char hasm) |
| LWMLINE * | lwmline_construct_empty (int srid, char hasz, char hasm) |
| LWMPOLY * | lwmpoly_construct_empty (int srid, char hasz, char hasm) |
| LWCOLLECTION * | lwcollection_construct_empty (uint8_t type, int srid, char hasz, char hasm) |
| LWPOINT * | lwpoint_make2d (int srid, double x, double y) |
| LWPOINT * | lwpoint_make3dz (int srid, double x, double y, double z) |
| LWPOINT * | lwpoint_make3dm (int srid, double x, double y, double m) |
| LWPOINT * | lwpoint_make4d (int srid, double x, double y, double z, double m) |
| LWPOINT * | lwpoint_make (int srid, int hasz, int hasm, const POINT4D *p) |
| LWLINE * | lwline_from_lwgeom_array (int srid, uint32_t ngeoms, LWGEOM **geoms) |
| LWLINE * | lwline_from_ptarray (int srid, uint32_t npoints, LWPOINT **points) |
| LWLINE * | lwline_from_lwmpoint (int srid, const LWMPOINT *mpoint) |
| LWLINE * | lwline_addpoint (LWLINE *line, LWPOINT *point, uint32_t where) |
| LWLINE * | lwline_removepoint (LWLINE *line, uint32_t which) |
| void | lwline_setPoint4d (LWLINE *line, uint32_t which, POINT4D *newpoint) |
| LWPOLY * | lwpoly_from_lwlines (const LWLINE *shell, uint32_t nholes, const LWLINE **holes) |
| LWPOLY * | lwpoly_construct_rectangle (char hasz, char hasm, POINT4D *p1, POINT4D *p2, POINT4D *p3, POINT4D *p4) |
| LWPOLY * | lwpoly_construct_envelope (int srid, double x1, double y1, double x2, double y2) |
| LWPOLY * | lwpoly_construct_circle (int srid, double x, double y, double radius, uint32_t segments_per_quarter, char exterior) |
| LWTRIANGLE * | lwtriangle_from_lwline (const LWLINE *shell) |
| LWMPOINT * | lwmpoint_from_lwgeom (const LWGEOM *g) |
| double | lwpoint_get_x (const LWPOINT *point) |
| double | lwpoint_get_y (const LWPOINT *point) |
| double | lwpoint_get_z (const LWPOINT *point) |
| double | lwpoint_get_m (const LWPOINT *point) |
| int32_t | lwgeom_get_srid (const LWGEOM *geom) |
| Return SRID number. More... | |
| uint32_t | lwgeom_get_type (const LWGEOM *geom) |
| Return LWTYPE number. More... | |
| int | lwgeom_has_z (const LWGEOM *geom) |
| Return LW_TRUE if geometry has Z ordinates. More... | |
| int | lwgeom_has_m (const LWGEOM *geom) |
| Return LW_TRUE if geometry has M ordinates. More... | |
| int | lwgeom_ndims (const LWGEOM *geom) |
| Return the number of dimensions (2, 3, 4) in a geometry. More... | |
| double | ptarray_locate_point (const POINTARRAY *pa, const POINT4D *pt, double *dist, POINT4D *p_located) |
| LWLINE * | lwline_measured_from_lwline (const LWLINE *lwline, double m_start, double m_end) |
| Add a measure dimension to a line, interpolating linearly from the start to the end value. More... | |
| LWMLINE * | lwmline_measured_from_lwmline (const LWMLINE *lwmline, double m_start, double m_end) |
| Re-write the measure ordinate (or add one, if it isn't already there) interpolating the measure between the supplied start and end values. More... | |
| LWGEOM * | lwgeom_locate_along (const LWGEOM *lwin, double m, double offset) |
| Determine the location(s) along a measured line where m occurs and return as a multipoint. More... | |
| LWCOLLECTION * | lwgeom_locate_between (const LWGEOM *lwin, double from, double to, double offset) |
| Determine the segments along a measured line that fall within the m-range given. More... | |
| double | lwgeom_interpolate_point (const LWGEOM *lwin, const LWPOINT *lwpt) |
| Find the measure value at the location on the line closest to the point. More... | |
| double | lwgeom_tcpa (const LWGEOM *g1, const LWGEOM *g2, double *mindist) |
| Find the time of closest point of approach. More... | |
| int | lwgeom_cpa_within (const LWGEOM *g1, const LWGEOM *g2, double maxdist) |
| Is the closest point of approach within a distance ? More... | |
| int | lwgeom_is_trajectory (const LWGEOM *geom) |
| Return LW_TRUE or LW_FALSE depending on whether or not a geometry is a linestring with measure value growing from start to end vertex. More... | |
| int | lwline_is_trajectory (const LWLINE *geom) |
| LWGEOM * | lwgeom_segmentize2d (LWGEOM *line, double dist) |
| POINTARRAY * | ptarray_segmentize2d (const POINTARRAY *ipa, double dist) |
| Returns a modified POINTARRAY so that no segment is longer than the given distance (computed using 2d). More... | |
| LWLINE * | lwline_segmentize2d (LWLINE *line, double dist) |
| LWPOLY * | lwpoly_segmentize2d (LWPOLY *line, double dist) |
| LWCOLLECTION * | lwcollection_segmentize2d (LWCOLLECTION *coll, double dist) |
| LWMPOINT * | lwpoly_to_points (const LWPOLY *poly, int npoints) |
| LWMPOINT * | lwmpoly_to_points (const LWMPOLY *mpoly, int npoints) |
| LWMPOINT * | lwgeom_to_points (const LWGEOM *lwgeom, int npoints) |
| LWPOINT * | lwgeom_median (const LWGEOM *g, double tol, uint32_t maxiter, char fail_if_not_converged) |
| LWPOINT * | lwmpoint_median (const LWMPOINT *g, double tol, uint32_t maxiter, char fail_if_not_converged) |
| char * | lwgeom_geohash (const LWGEOM *lwgeom, int precision) |
| Calculate the GeoHash (http://geohash.org) string for a geometry. More... | |
| unsigned int | geohash_point_as_int (POINT2D *pt) |
| int | lwline_crossing_direction (const LWLINE *l1, const LWLINE *l2) |
| Given two lines, characterize how (and if) they cross each other. More... | |
| LWCOLLECTION * | lwgeom_clip_to_ordinate_range (const LWGEOM *lwin, char ordinate, double from, double to, double offset) |
| Given a geometry clip based on the from/to range of one of its ordinates (x, y, z, m). More... | |
| #define | LW_X3D_FLIP_XY (1<<0) |
| Macros for specifying X3D options. More... | |
| #define | LW_X3D_USE_GEOCOORDS (1<<1) |
| #define | X3D_USE_GEOCOORDS(x) ((x) & LW_X3D_USE_GEOCOORDS) |
| #define | LW_PARSER_CHECK_MINPOINTS 1 |
| Parser check flags. More... | |
| #define | LW_PARSER_CHECK_ODD 2 |
| #define | LW_PARSER_CHECK_CLOSURE 4 |
| #define | LW_PARSER_CHECK_ZCLOSURE 8 |
| #define | LW_PARSER_CHECK_NONE 0 |
| #define | LW_PARSER_CHECK_ALL (LW_PARSER_CHECK_MINPOINTS | LW_PARSER_CHECK_ODD | LW_PARSER_CHECK_CLOSURE) |
| #define | PARSER_ERROR_MOREPOINTS 1 |
| #define | PARSER_ERROR_ODDPOINTS 2 |
| #define | PARSER_ERROR_UNCLOSED 3 |
| #define | PARSER_ERROR_MIXDIMS 4 |
| #define | PARSER_ERROR_INVALIDGEOM 5 |
| #define | PARSER_ERROR_INVALIDWKBTYPE 6 |
| #define | PARSER_ERROR_INCONTINUOUS 7 |
| #define | PARSER_ERROR_TRIANGLEPOINTS 8 |
| #define | PARSER_ERROR_LESSPOINTS 9 |
| #define | PARSER_ERROR_OTHER 10 |
| #define | UNPARSER_ERROR_MOREPOINTS 1 |
| #define | UNPARSER_ERROR_ODDPOINTS 2 |
| #define | UNPARSER_ERROR_UNCLOSED 3 |
| #define | WKB_ISO 0x01 |
| #define | WKB_SFSQL 0x02 |
| #define | WKB_EXTENDED 0x04 |
| #define | WKB_NDR 0x08 |
| #define | WKB_XDR 0x10 |
| #define | WKB_HEX 0x20 |
| #define | WKB_NO_NPOINTS 0x40 /* Internal use only */ |
| #define | WKB_NO_SRID 0x80 /* Internal use only */ |
| #define | WKT_ISO 0x01 |
| #define | WKT_SFSQL 0x02 |
| #define | WKT_EXTENDED 0x04 |
| #define | TWKB_BBOX 0x01 /* User wants bboxes */ |
| #define | TWKB_SIZE 0x02 /* User wants sizes */ |
| #define | TWKB_ID 0x04 /* User wants id */ |
| #define | TWKB_NO_TYPE 0x10 /* No type because it is a sub geoemtry */ |
| #define | TWKB_NO_ID 0x20 /* No ID because it is a subgeoemtry */ |
| #define | TWKB_DEFAULT_PRECISION 0 /* Aim for 1m (or ft) rounding by default */ |
| enum | LW_LINEARIZE_TOLERANCE_TYPE { LW_LINEARIZE_TOLERANCE_TYPE_SEGS_PER_QUAD = 0, LW_LINEARIZE_TOLERANCE_TYPE_MAX_DEVIATION = 1, LW_LINEARIZE_TOLERANCE_TYPE_MAX_ANGLE = 2 } |
Semantic of the tolerance argument passed to lwcurve_linearize. More... | |
| enum | LW_LINEARIZE_FLAGS { LW_LINEARIZE_FLAG_SYMMETRIC = 1 << 0, LW_LINEARIZE_FLAG_RETAIN_ANGLE = 1 << 1 } |
| typedef struct LWPOINTITERATOR | LWPOINTITERATOR |
| typedef struct struct_lwgeom_parser_result | LWGEOM_PARSER_RESULT |
| Parser result structure: returns the result of attempting to convert (E)WKT/(E)WKB to LWGEOM. More... | |
| typedef struct struct_lwgeom_unparser_result | LWGEOM_UNPARSER_RESULT |
| char * | lwgeom_to_gml2 (const LWGEOM *geom, const char *srs, int precision, const char *prefix) |
| VERSION GML 2 takes a GEOMETRY and returns a GML2 representation. More... | |
| char * | lwgeom_extent_to_gml2 (const LWGEOM *geom, const char *srs, int precision, const char *prefix) |
| char * | lwgeom_extent_to_gml3 (const LWGEOM *geom, const char *srs, int precision, int opts, const char *prefix) |
| char * | lwgeom_to_gml3 (const LWGEOM *geom, const char *srs, int precision, int opts, const char *prefix, const char *id) |
| char * | lwgeom_to_kml2 (const LWGEOM *geom, int precision, const char *prefix) |
| char * | lwgeom_to_geojson (const LWGEOM *geo, char *srs, int precision, int has_bbox) |
| Takes a GEOMETRY and returns a GeoJson representation. More... | |
| char * | lwgeom_to_svg (const LWGEOM *geom, int precision, int relative) |
| Takes a GEOMETRY and returns a SVG representation. More... | |
| char * | lwgeom_to_x3d3 (const LWGEOM *geom, char *srs, int precision, int opts, const char *defid) |
| char * | lwgeom_to_encoded_polyline (const LWGEOM *geom, int precision) |
| LWGEOM * | lwgeom_from_geojson (const char *geojson, char **srs) |
| Create an LWGEOM object from a GeoJSON representation. More... | |
| LWGEOM * | lwgeom_from_encoded_polyline (const char *encodedpolyline, int precision) |
| Create an LWGEOM object from an Encoded Polyline representation. More... | |
| void | spheroid_init (SPHEROID *s, double a, double b) |
| Initialize a spheroid object for use in geodetic functions. More... | |
| double | lwgeom_distance_spheroid (const LWGEOM *lwgeom1, const LWGEOM *lwgeom2, const SPHEROID *spheroid, double tolerance) |
| Calculate the geodetic distance from lwgeom1 to lwgeom2 on the spheroid. More... | |
| LWPOINT * | lwgeom_project_spheroid (const LWPOINT *r, const SPHEROID *spheroid, double distance, double azimuth) |
| Calculate the location of a point on a spheroid, give a start point, bearing and distance. More... | |
| LWGEOM * | lwgeom_segmentize_sphere (const LWGEOM *lwg_in, double max_seg_length) |
| Derive a new geometry with vertices added to ensure no vertex is more than max_seg_length (in radians) from any other vertex. More... | |
| double | lwgeom_azumith_spheroid (const LWPOINT *r, const LWPOINT *s, const SPHEROID *spheroid) |
| Calculate the bearing between two points on a spheroid. More... | |
| double | lwgeom_area_sphere (const LWGEOM *lwgeom, const SPHEROID *spheroid) |
| Calculate the geodetic area of a lwgeom on the sphere. More... | |
| double | lwgeom_area_spheroid (const LWGEOM *lwgeom, const SPHEROID *spheroid) |
| Calculate the geodetic area of a lwgeom on the spheroid. More... | |
| double | lwgeom_length_spheroid (const LWGEOM *geom, const SPHEROID *s) |
| Calculate the geodetic length of a lwgeom on the unit sphere. More... | |
| int | lwgeom_covers_lwgeom_sphere (const LWGEOM *lwgeom1, const LWGEOM *lwgeom2) |
| Calculate covers predicate for two lwgeoms on the sphere. More... | |
| void | lwboundingcircle_destroy (LWBOUNDINGCIRCLE *c) |
| LWBOUNDINGCIRCLE * | lwgeom_calculate_mbc (const LWGEOM *g) |
| LWGEOM * | lwgeom_remove_repeated_points (const LWGEOM *in, double tolerance) |
| Remove repeated points! More... | |
| char | lwtriangle_is_repeated_points (LWTRIANGLE *triangle) |
| void | lwgeom_swap_ordinates (LWGEOM *in, LWORD o1, LWORD o2) |
| Swap ordinate values in every vertex of the geometry. More... | |
| LWGEOM * | lwgeom_flip_coordinates (LWGEOM *in) |
| Reverse the X and Y coordinate order. More... | |
| LWPOINTITERATOR * | lwpointiterator_create (const LWGEOM *g) |
| Create a new LWPOINTITERATOR over supplied LWGEOM*. More... | |
| LWPOINTITERATOR * | lwpointiterator_create_rw (LWGEOM *g) |
| Create a new LWPOINTITERATOR over supplied LWGEOM* Supports modification of coordinates during iteration. More... | |
| void | lwpointiterator_destroy (LWPOINTITERATOR *s) |
| Free all memory associated with the iterator. More... | |
| int | lwpointiterator_has_next (LWPOINTITERATOR *s) |
| Returns LW_TRUE if there is another point available in the iterator. More... | |
| int | lwpointiterator_modify_next (LWPOINTITERATOR *s, const POINT4D *p) |
| Attempts to replace the next point int the iterator with p, and advances the iterator to the next point. More... | |
| int | lwpointiterator_next (LWPOINTITERATOR *s, POINT4D *p) |
| Attempts to assign the next point in the iterator to p, and advances the iterator to the next point. More... | |
| int | lwpointiterator_peek (LWPOINTITERATOR *s, POINT4D *p) |
| Attempts to assigns the next point in the iterator to p. More... | |
| uint8_t | parse_hex (char *str) |
| Convert a single hex digit into the corresponding char. More... | |
| void | deparse_hex (uint8_t str, char *result) |
| Convert a char into a human readable hex digit. More... | |
| GBOX * | gserialized_calculate_gbox_geocentric (const GSERIALIZED *g) |
| Calculate the geocentric bounding box directly from the serialized form of the geodetic coordinates. More... | |
| int | gserialized_calculate_gbox_geocentric_p (const GSERIALIZED *g, GBOX *g_box) |
| Calculate the geocentric bounding box directly from the serialized form of the geodetic coordinates. More... | |
| char * | gserialized_to_string (const GSERIALIZED *g) |
| Return a WKT representation of the gserialized geometry. More... | |
| GSERIALIZED * | gserialized_copy (const GSERIALIZED *g) |
| Return a copy of the input serialized geometry. More... | |
| int | lwgeom_check_geodetic (const LWGEOM *geom) |
| Check that coordinates of LWGEOM are all within the geodetic range (-180, -90, 180, 90) More... | |
| int | lwgeom_nudge_geodetic (LWGEOM *geom) |
| Gently move coordinates of LWGEOM if they are close enough into geodetic range. More... | |
| int | lwgeom_force_geodetic (LWGEOM *geom) |
| Force coordinates of LWGEOM into geodetic range (-180, -90, 180, 90) More... | |
| void | lwgeom_set_geodetic (LWGEOM *geom, int value) |
| Set the FLAGS geodetic bit on geometry an all sub-geometries and pointlists. More... | |
| int | lwgeom_calculate_gbox_geodetic (const LWGEOM *geom, GBOX *gbox) |
| Calculate the geodetic bounding box for an LWGEOM. More... | |
| int | lwgeom_calculate_gbox_cartesian (const LWGEOM *lwgeom, GBOX *gbox) |
| Calculate the 2-4D bounding box of a geometry. More... | |
| int | lwgeom_calculate_gbox (const LWGEOM *lwgeom, GBOX *gbox) |
| Calculate bounding box of a geometry, automatically taking into account whether it is cartesian or geodetic. More... | |
| int | getPoint2d_p_ro (const POINTARRAY *pa, int n, POINT2D **point) |
| New function to read doubles directly from the double* coordinate array of an aligned lwgeom POINTARRAY (built by de-serializing a GSERIALIZED). More... | |
| int | ptarray_calculate_gbox_geodetic (const POINTARRAY *pa, GBOX *gbox) |
| Calculate geodetic (x/y/z) box and add values to gbox. More... | |
| int | ptarray_calculate_gbox_cartesian (const POINTARRAY *pa, GBOX *gbox) |
| Calculate box (x/y) and add values to gbox. More... | |
| int | gbox_pt_outside (const GBOX *gbox, POINT2D *pt_outside) |
| Calculate a spherical point that falls outside the geocentric gbox. More... | |
| GBOX * | gbox_new (uint8_t flags) |
| Create a new gbox with the dimensionality indicated by the flags. More... | |
| void | gbox_init (GBOX *gbox) |
| Zero out all the entries in the GBOX. More... | |
| int | gbox_merge (const GBOX *new_box, GBOX *merged_box) |
| Update the merged GBOX to be large enough to include itself and the new box. More... | |
| int | gbox_union (const GBOX *g1, const GBOX *g2, GBOX *gout) |
| Update the output GBOX to be large enough to include both inputs. More... | |
| void | gbox_expand (GBOX *g, double d) |
| Move the box minimums down and the maximums up by the distance provided. More... | |
| void | gbox_expand_xyzm (GBOX *g, double dx, double dy, double dz, double dm) |
| Move the box minimums down and the maximums up by the distances provided. More... | |
| int | gbox_init_point3d (const POINT3D *p, GBOX *gbox) |
| Initialize a GBOX using the values of the point. More... | |
| int | gbox_merge_point3d (const POINT3D *p, GBOX *gbox) |
| Update the GBOX to be large enough to include itself and the new point. More... | |
| int | gbox_contains_point3d (const GBOX *gbox, const POINT3D *pt) |
| Return true if the point is inside the gbox. More... | |
| char * | gbox_to_string (const GBOX *gbox) |
| Allocate a string representation of the GBOX, based on dimensionality of flags. More... | |
| GBOX * | gbox_copy (const GBOX *gbox) |
| Return a copy of the GBOX, based on dimensionality of flags. More... | |
| GBOX * | gbox_from_string (const char *str) |
| Warning, do not use this function, it is very particular about inputs. More... | |
| int | gbox_overlaps (const GBOX *g1, const GBOX *g2) |
| Return LW_TRUE if the GBOX overlaps, LW_FALSE otherwise. More... | |
| int | gbox_overlaps_2d (const GBOX *g1, const GBOX *g2) |
| Return LW_TRUE if the GBOX overlaps on the 2d plane, LW_FALSE otherwise. More... | |
| int | gbox_contains_2d (const GBOX *g1, const GBOX *g2) |
| Return LW_TRUE if the first GBOX contains the second on the 2d plane, LW_FALSE otherwise. More... | |
| void | gbox_duplicate (const GBOX *original, GBOX *duplicate) |
| Copy the values of original GBOX into duplicate. More... | |
| size_t | gbox_serialized_size (uint8_t flags) |
| Return the number of bytes necessary to hold a GBOX of this dimension in serialized form. More... | |
| int | gbox_same (const GBOX *g1, const GBOX *g2) |
| Check if 2 given Gbox are the same. More... | |
| int | gbox_same_2d (const GBOX *g1, const GBOX *g2) |
| Check if 2 given GBOX are the same in x and y. More... | |
| int | gbox_same_2d_float (const GBOX *g1, const GBOX *g2) |
| Check if two given GBOX are the same in x and y, or would round to the same GBOX in x and if serialized in GSERIALIZED. More... | |
| void | gbox_float_round (GBOX *gbox) |
| Round given GBOX to float boundaries. More... | |
| int | gbox_is_valid (const GBOX *gbox) |
| Return false if any of the dimensions is NaN or infinite. More... | |
| uint64_t | gbox_get_sortable_hash (const GBOX *g) |
| Return a sortable key based on the center point of the GBOX. More... | |
| int | geometry_type_from_string (const char *str, uint8_t *type, int *z, int *m) |
| Utility function to get type number from string. More... | |
| size_t | gserialized_from_lwgeom_size (const LWGEOM *geom) |
| Calculate required memory segment to contain a serialized form of the LWGEOM. More... | |
| GSERIALIZED * | gserialized_from_lwgeom (LWGEOM *geom, size_t *size) |
| Allocate a new GSERIALIZED from an LWGEOM. More... | |
| LWGEOM * | lwgeom_from_gserialized (const GSERIALIZED *g) |
| Allocate a new LWGEOM from a GSERIALIZED. More... | |
| int | gserialized_get_gbox_p (const GSERIALIZED *g, GBOX *gbox) |
| Pull a GBOX from the header of a GSERIALIZED, if one is available. More... | |
| char * | lwgeom_to_wkt (const LWGEOM *geom, uint8_t variant, int precision, size_t *size_out) |
| WKT emitter function. More... | |
| uint8_t * | lwgeom_to_wkb (const LWGEOM *geom, uint8_t variant, size_t *size_out) |
| Convert LWGEOM to a char* in WKB format. More... | |
| char * | lwgeom_to_hexwkb (const LWGEOM *geom, uint8_t variant, size_t *size_out) |
| char * | lwgeom_to_ewkt (const LWGEOM *lwgeom) |
| Return an alloced string. More... | |
| LWGEOM * | lwgeom_from_wkb (const uint8_t *wkb, const size_t wkb_size, const char check) |
| WKB inputs must have a declared size, to prevent malformed WKB from reading off the end of the memory segment (this stops a malevolent user from declaring a one-ring polygon to have 10 rings, causing the WKB reader to walk off the end of the memory). More... | |
| LWGEOM * | lwgeom_from_wkt (const char *wkt, const char check) |
| LWGEOM * | lwgeom_from_hexwkb (const char *hexwkb, const char check) |
| uint8_t * | bytes_from_hexbytes (const char *hexbuf, size_t hexsize) |
| char * | hexbytes_from_bytes (uint8_t *bytes, size_t size) |
| int | lwgeom_parse_wkt (LWGEOM_PARSER_RESULT *parser_result, char *wktstr, int parse_flags) |
| Parse a WKT geometry string into an LWGEOM structure. More... | |
| void | lwgeom_parser_result_init (LWGEOM_PARSER_RESULT *parser_result) |
| void | lwgeom_parser_result_free (LWGEOM_PARSER_RESULT *parser_result) |
| void * | lwalloc (size_t size) |
| void * | lwrealloc (void *mem, size_t size) |
| void | lwfree (void *mem) |
| char * | lwmessage_truncate (char *str, int startpos, int endpos, int maxlength, int truncdirection) |
| LWGEOM * | lwgeom_from_twkb (uint8_t *twkb, size_t twkb_size, char check) |
| WKB inputs must have a declared size, to prevent malformed WKB from reading off the end of the memory segment (this stops a malevolent user from declaring a one-ring polygon to have 10 rings, causing the WKB reader to walk off the end of the memory). More... | |
| uint8_t * | lwgeom_to_twkb (const LWGEOM *geom, uint8_t variant, int8_t precision_xy, int8_t precision_z, int8_t precision_m, size_t *twkb_size) |
| uint8_t * | lwgeom_to_twkb_with_idlist (const LWGEOM *geom, int64_t *idlist, uint8_t variant, int8_t precision_xy, int8_t precision_z, int8_t precision_m, size_t *twkb_size) |
| Convert LWGEOM to a char* in TWKB format. More... | |
| int | lwgeom_has_arc (const LWGEOM *geom) |
| LWGEOM * | lwgeom_stroke (const LWGEOM *geom, uint32_t perQuad) |
| LWGEOM * | lwgeom_unstroke (const LWGEOM *geom) |
| LWGEOM * | lwcurve_linearize (const LWGEOM *geom, double tol, LW_LINEARIZE_TOLERANCE_TYPE type, int flags) |
| const char * | lwgeom_geos_version (void) |
| Return GEOS version string (not to be freed) More... | |
| LWGEOM * | lwgeom_geos_noop (const LWGEOM *geom) |
| Convert an LWGEOM to a GEOS Geometry and convert back – for debug only. More... | |
| LWGEOM * | lwgeom_normalize (const LWGEOM *geom) |
| LWGEOM * | lwgeom_intersection (const LWGEOM *geom1, const LWGEOM *geom2) |
| LWGEOM * | lwgeom_difference (const LWGEOM *geom1, const LWGEOM *geom2) |
| LWGEOM * | lwgeom_symdifference (const LWGEOM *geom1, const LWGEOM *geom2) |
| LWGEOM * | lwgeom_centroid (const LWGEOM *geom) |
| LWGEOM * | lwgeom_union (const LWGEOM *geom1, const LWGEOM *geom2) |
| LWGEOM * | lwgeom_linemerge (const LWGEOM *geom1) |
| LWGEOM * | lwgeom_unaryunion (const LWGEOM *geom1) |
| LWGEOM * | lwgeom_clip_by_rect (const LWGEOM *geom1, double x0, double y0, double x1, double y1) |
| LWCOLLECTION * | lwgeom_subdivide (const LWGEOM *geom, int maxvertices) |
| LWGEOM * | lwgeom_snap (const LWGEOM *geom1, const LWGEOM *geom2, double tolerance) |
| Snap vertices and segments of a geometry to another using a given tolerance. More... | |
| LWGEOM * | lwgeom_sharedpaths (const LWGEOM *geom1, const LWGEOM *geom2) |
| LWGEOM * | lwgeom_offsetcurve (const LWLINE *lwline, double size, int quadsegs, int joinStyle, double mitreLimit) |
| int | lwgeom_is_simple (const LWGEOM *lwgeom) |
| projPJ | lwproj_from_string (const char *txt) |
| Get a projection from a string representation. More... | |
| int | lwgeom_transform (LWGEOM *geom, projPJ inpj, projPJ outpj) |
| Transform (reproject) a geometry in-place. More... | |
| int | ptarray_transform (POINTARRAY *geom, projPJ inpj, projPJ outpj) |
| Transform given POINTARRAY from inpj projection to outpj projection. More... | |
| int | point4d_transform (POINT4D *pt, projPJ srcpj, projPJ dstpj) |
| LWGEOM * | lwgeom_buildarea (const LWGEOM *geom) |
| Take a geometry and return an areal geometry (Polygon or MultiPolygon). More... | |
| LWGEOM * | lwgeom_make_valid (LWGEOM *geom) |
| Attempts to make an invalid geometries valid w/out losing points. More... | |
| LWGEOM * | lwgeom_split (const LWGEOM *lwgeom_in, const LWGEOM *blade_in) |
| LWGEOM * | lwgeom_node (const LWGEOM *lwgeom_in) |
| LWGEOM * | lwgeom_delaunay_triangulation (const LWGEOM *geom, double tolerance, int edgeOnly) |
| Take vertices of a geometry and build a delaunay triangulation on them. More... | |
| LWGEOM * | lwgeom_voronoi_diagram (const LWGEOM *g, const GBOX *env, double tolerance, int output_edges) |
| Take vertices of a geometry and build the Voronoi diagram. More... | |
| int * | lwgeom_cluster_2d_kmeans (const LWGEOM **geoms, int ngeoms, int k) |
| Take a list of LWGEOMs and a number of clusters and return an integer array indicating which cluster each geometry is in. More... | |
Detailed Description
This library is the generic geometry handling section of PostGIS.
The geometry objects, constructors, destructors, and a set of spatial processing functions, are implemented here.
The library is designed for use in non-PostGIS applications if necessary. The units tests at cunit/cu_tester.c and the loader/dumper programs at ../loader/shp2pgsql.c are examples of non-PostGIS applications using liblwgeom.
Programs using this library can install their custom memory managers and error handlers by calling the lwgeom_set_handlers() function, otherwise the default ones will be used.
Definition in file liblwgeom.h.
