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geo.jts

Wrapper for the locationtech JTS spatial library. Constructors for points,
coordinate sequences, rings, polygons, multipolygons, and so on.

centroid

(centroid g)
Get the centroid of a JTS object.

coord

(coord point)
coord-array
(coord-array coordinates)
coordinate
(coordinate x y)(coordinate x y z)(coordinate x y z m)
Creates a Coordinate.

coordinate-sequence
(coordinate-sequence coordinates)
Given a list of Coordinates, generates a CoordinateSequence.

coordinates
(coordinates geom)
Get a sequence of Coordinates from a Geometry

coords
(coords linestring)
default-srid
envelope
(envelope c1 c2)
Create a JTS envelope from two coordinates.

geom-array
(geom-array geoms)
geometries
(geometries c)
Given a GeometryCollection, generate a sequence of Geometries

geometry-collection
(geometry-collection geometries)
Given a list of Geometries, generates a GeometryCollection.

get-envelope-internal
(get-envelope-internal g)
Get a JTS envelope from a geometry.

get-factory
(get-factory geom)
Gets a GeometryFactory for a given geometry.

get-srid
(get-srid geom)
Gets an integer SRID for a given geometry.

gf
(gf srid)
Creates a GeometryFactory for a given SRID.

gf-wgs84
intersection
(intersection g1 g2)
Get the intersection of two geometries.

line-segment
(line-segment c1 c2)
Given two Coordinates, creates a LineSegment.

linear-ring
(linear-ring coordinates)(linear-ring coordinates srid)
Given a list of Coordinates, creates a LinearRing. Allows an optional SRID argument at end.

linear-ring-array
(linear-ring-array rings)
linear-ring-wkt
(linear-ring-wkt coordinates)(linear-ring-wkt coordinates srid)
Makes a LinearRing from a WKT-style data structure: a flat sequence of
coordinate pairs, e.g. [0 0, 1 0, 0 2, 0 0]. Allows an optional SRID argument at end.
linestring
(linestring coordinates)(linestring coordinates srid)
Given a list of Coordinates, creates a LineString. Allows an optional SRID argument at end.

linestring-array
(linestring-array linestrings)
linestring-wkt
(linestring-wkt coordinates)(linestring-wkt coordinates srid)
Makes a LineString from a WKT-style data structure: a flat sequence of
coordinate pairs, e.g. [0 0, 1 0, 0 2, 0 0]. Allows an optional SRID argument at end.
multi-linestring
(multi-linestring linestrings)
Given a list of LineStrings, generates a MultiLineString.

multi-linestring-wkt
(multi-linestring-wkt wkt)(multi-linestring-wkt wkt srid)
Creates a MultiLineString from a WKT-style data structure, e.g. [[0 0, 1 0, 0 2, 0 0] [0 -1 1 2]].
Allows an optional SRID argument at end.
multi-point
(multi-point points)
Given a list of points, generates a MultiPoint.

multi-polygon
(multi-polygon polygons)
Given a list of polygons, generates a MultiPolygon.

multi-polygon-wkt
(multi-polygon-wkt wkt)(multi-polygon-wkt wkt srid)
Creates a MultiPolygon from a WKT-style data structure, e.g. [[[0 0 1 0 2 2
0 0]] [5 5 10 10 6 2]]. Allows an optional SRID argument at end.
pm
point
(point coordinate)(point lat long)(point x y srid)
Creates a Point from a Coordinate, a lat/long, or an x,y pair with an SRID.

point-array
(point-array points)
point-n
(point-n linestring idx)
Get the point for a linestring at the specified index.

polygon
(polygon shell)(polygon shell holes)
Given a LinearRing shell, and a list of LinearRing holes, generates a
polygon.
polygon-array
(polygon-array polygons)
polygon-wkt
(polygon-wkt rings)(polygon-wkt rings srid)
Generates a polygon from a WKT-style data structure: a sequence of
[outer-ring hole1 hole2 ...], where outer-ring and each hole is a flat list
of coordinate pairs, e.g.

[[0 0 10 0 10 10 0 0]
 [1 1  9 1  9  9 1 1]].

 Allows an optional SRID argument at end.
polygons
(polygons m)
Given a MultiPolygon, generate a sequence of Polygons

same-coords?
(same-coords? c1 c2)
Check if two Coordinates have the same number of dimensions and equal ordinates.

same-geom?
(same-geom? g1 g2)
Check if two geometries are topologically equal, with the same SRID.
Two SRIDs of 0 are considered equal to each other.
same-srid?
(same-srid? g1 g2)
Check if two Geometries have the same SRID. If both geometries have SRIDs of 0, will also return true.

segment-at-idx
(segment-at-idx linestring idx)
LineSegment from a LineString's point at index to index + 1.

set-srid
(set-srid geom crs)
Sets a geometry's SRID to a new value, and returns that geometry.

subdivide
(subdivide g)
Subdivide a Geometry into quadrants around its centroid.

transform-geom
(transform-geom g t)(transform-geom g c1 c2)
Transform a Geometry.
When a single CoordinateTransform is passed, apply that transform to the Geometry. When the target CRS
has an SRID, set the geometry's SRID to that. When a single Transformable target is passed, attempt to
find the geometry's CRS to generate and apply a CoordinateTransform. When two CRSs are passed as
arguments, generate a CoordinateTransform and apply accordingly.
wkt->coords-array
(wkt->coords-array flat-coord-list)