Class Point
- java.lang.Object
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- org.locationtech.jts.geom.Geometry
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- org.locationtech.jts.geom.Point
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
,java.lang.Comparable
,Puntal
public class Point extends Geometry implements Puntal
Represents a single point. APoint
is topologically valid if and only if:- the coordinate which defines it (if any) is a valid coordinate
(i.e. does not have an
NaN
X or Y ordinate)
- Version:
- 1.7
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.locationtech.jts.geom.Geometry
TYPENAME_GEOMETRYCOLLECTION, TYPENAME_LINEARRING, TYPENAME_LINESTRING, TYPENAME_MULTILINESTRING, TYPENAME_MULTIPOINT, TYPENAME_MULTIPOLYGON, TYPENAME_POINT, TYPENAME_POLYGON
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Constructor Summary
Constructors Constructor Description Point(Coordinate coordinate, PrecisionModel precisionModel, int SRID)
Deprecated.Use GeometryFactory insteadPoint(CoordinateSequence coordinates, GeometryFactory factory)
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
apply(CoordinateFilter filter)
Performs an operation with or on thisGeometry
's coordinates.void
apply(CoordinateSequenceFilter filter)
Performs an operation on the coordinates in thisGeometry
'sCoordinateSequence
s.void
apply(GeometryComponentFilter filter)
Performs an operation with or on this Geometry and its component Geometry's.void
apply(GeometryFilter filter)
Performs an operation with or on thisGeometry
and its subelementGeometry
s (if any).java.lang.Object
clone()
Deprecated.boolean
equalsExact(Geometry other, double tolerance)
Returns true if the twoGeometry
s are exactly equal, up to a specified distance tolerance.Geometry
getBoundary()
Gets the boundary of this geometry.int
getBoundaryDimension()
Returns the dimension of thisGeometry
s inherent boundary.Coordinate
getCoordinate()
Returns a vertex of thisGeometry
(usually, but not necessarily, the first one).Coordinate[]
getCoordinates()
Returns an array containing the values of all the vertices for this geometry.CoordinateSequence
getCoordinateSequence()
int
getDimension()
Returns the dimension of this geometry.java.lang.String
getGeometryType()
Returns the name of this Geometry's actual class.int
getNumPoints()
Returns the count of thisGeometry
s vertices.double
getX()
double
getY()
boolean
isEmpty()
Tests whether the set of points covered by thisGeometry
is empty.boolean
isSimple()
Tests whether thisGeometry
is simple.void
normalize()
Converts thisGeometry
to normal form (or canonical form ).Geometry
reverse()
Deprecated.-
Methods inherited from class org.locationtech.jts.geom.Geometry
buffer, buffer, buffer, compareTo, compareTo, contains, convexHull, copy, coveredBy, covers, crosses, difference, disjoint, distance, equals, equals, equalsExact, equalsNorm, equalsTopo, geometryChanged, getArea, getCentroid, getEnvelope, getEnvelopeInternal, getFactory, getGeometryN, getInteriorPoint, getLength, getNumGeometries, getPrecisionModel, getSRID, getUserData, hashCode, intersection, intersects, isRectangle, isValid, isWithinDistance, norm, overlaps, relate, relate, setSRID, setUserData, symDifference, toString, toText, touches, union, union, within
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Constructor Detail
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Point
public Point(Coordinate coordinate, PrecisionModel precisionModel, int SRID)
Deprecated.Use GeometryFactory insteadConstructs aPoint
with the given coordinate.- Parameters:
coordinate
- the coordinate on which to base thisPoint
, ornull
to create the empty geometry.precisionModel
- the specification of the grid of allowable points for thisPoint
SRID
- the ID of the Spatial Reference System used by thisPoint
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Point
public Point(CoordinateSequence coordinates, GeometryFactory factory)
- Parameters:
coordinates
- contains the single coordinate on which to base thisPoint
, ornull
to create the empty geometry.
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Method Detail
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getCoordinates
public Coordinate[] getCoordinates()
Description copied from class:Geometry
Returns an array containing the values of all the vertices for this geometry. If the geometry is a composite, the array will contain all the vertices for the components, in the order in which the components occur in the geometry.In general, the array cannot be assumed to be the actual internal storage for the vertices. Thus modifying the array may not modify the geometry itself. Use the
CoordinateSequence.setOrdinate(int, int, double)
method (possibly on the components) to modify the underlying data. If the coordinates are modified,Geometry.geometryChanged()
must be called afterwards.- Specified by:
getCoordinates
in classGeometry
- Returns:
- the vertices of this
Geometry
- See Also:
Geometry.geometryChanged()
,CoordinateSequence.setOrdinate(int, int, double)
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getNumPoints
public int getNumPoints()
Description copied from class:Geometry
Returns the count of thisGeometry
s vertices. TheGeometry
s contained by compositeGeometry
s must be Geometry's; that is, they must implementgetNumPoints
- Specified by:
getNumPoints
in classGeometry
- Returns:
- the number of vertices in this
Geometry
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isEmpty
public boolean isEmpty()
Description copied from class:Geometry
Tests whether the set of points covered by thisGeometry
is empty.
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isSimple
public boolean isSimple()
Description copied from class:Geometry
Tests whether thisGeometry
is simple. The SFS definition of simplicity follows the general rule that a Geometry is simple if it has no points of self-tangency, self-intersection or other anomalous points.Simplicity is defined for each
Geometry
subclass as follows:- Valid polygonal geometries are simple, since their rings
must not self-intersect.
isSimple
tests for this condition and reportsfalse
if it is not met. (This is a looser test than checking for validity). - Linear rings have the same semantics.
- Linear geometries are simple iff they do not self-intersect at points other than boundary points.
- Zero-dimensional geometries (points) are simple iff they have no repeated points.
- Empty
Geometry
s are always simple.
- Overrides:
isSimple
in classGeometry
- Returns:
true
if thisGeometry
is simple- See Also:
Geometry.isValid()
- Valid polygonal geometries are simple, since their rings
must not self-intersect.
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getDimension
public int getDimension()
Description copied from class:Geometry
Returns the dimension of this geometry. The dimension of a geometry is is the topological dimension of its embedding in the 2-D Euclidean plane. In the JTS spatial model, dimension values are in the set {0,1,2}.Note that this is a different concept to the dimension of the vertex
Coordinate
s. The geometry dimension can never be greater than the coordinate dimension. For example, a 0-dimensional geometry (e.g. a Point) may have a coordinate dimension of 3 (X,Y,Z).- Specified by:
getDimension
in classGeometry
- Returns:
- the topological dimension of this geometry.
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getBoundaryDimension
public int getBoundaryDimension()
Description copied from class:Geometry
Returns the dimension of thisGeometry
s inherent boundary.- Specified by:
getBoundaryDimension
in classGeometry
- Returns:
- the dimension of the boundary of the class implementing this
interface, whether or not this object is the empty geometry. Returns
Dimension.FALSE
if the boundary is the empty geometry.
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getX
public double getX()
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getY
public double getY()
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getCoordinate
public Coordinate getCoordinate()
Description copied from class:Geometry
Returns a vertex of thisGeometry
(usually, but not necessarily, the first one). The returned coordinate should not be assumed to be an actual Coordinate object used in the internal representation.- Specified by:
getCoordinate
in classGeometry
- Returns:
- a
Coordinate
which is a vertex of thisGeometry
.
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getGeometryType
public java.lang.String getGeometryType()
Description copied from class:Geometry
Returns the name of this Geometry's actual class.- Specified by:
getGeometryType
in classGeometry
- Returns:
- the name of this
Geometry
s actual class
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getBoundary
public Geometry getBoundary()
Gets the boundary of this geometry. Zero-dimensional geometries have no boundary by definition, so an empty GeometryCollection is returned.- Specified by:
getBoundary
in classGeometry
- Returns:
- an empty GeometryCollection
- See Also:
Geometry.getBoundary()
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equalsExact
public boolean equalsExact(Geometry other, double tolerance)
Description copied from class:Geometry
Returns true if the twoGeometry
s are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance if and only if:- they have the same structure
- they have the same values for their vertices, within the given tolerance distance, in exactly the same order.
GeometryFactory
, theSRID
, or theuserData
fields.To properly test equality between different geometries, it is usually necessary to
Geometry.normalize()
them first.- Specified by:
equalsExact
in classGeometry
- Parameters:
other
- theGeometry
with which to compare thisGeometry
tolerance
- distance at or below which twoCoordinate
s are considered equal- Returns:
true
if this and the otherGeometry
have identical structure and point values, up to the distance tolerance.- See Also:
Geometry.equalsExact(Geometry)
,Geometry.normalize()
,Geometry.norm()
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apply
public void apply(CoordinateFilter filter)
Description copied from class:Geometry
Performs an operation with or on thisGeometry
's coordinates. If this method modifies any coordinate values,Geometry.geometryChanged()
must be called to update the geometry state. Note that you cannot use this method to modify this Geometry if its underlying CoordinateSequence's #get method returns a copy of the Coordinate, rather than the actual Coordinate stored (if it even stores Coordinate objects at all).
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apply
public void apply(CoordinateSequenceFilter filter)
Description copied from class:Geometry
Performs an operation on the coordinates in thisGeometry
'sCoordinateSequence
s. If the filter reports that a coordinate value has been changed,Geometry.geometryChanged()
will be called automatically.
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apply
public void apply(GeometryFilter filter)
Description copied from class:Geometry
Performs an operation with or on thisGeometry
and its subelementGeometry
s (if any). Only GeometryCollections and subclasses have subelement Geometry's.
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apply
public void apply(GeometryComponentFilter filter)
Description copied from class:Geometry
Performs an operation with or on this Geometry and its component Geometry's. Only GeometryCollections and Polygons have component Geometry's; for Polygons they are the LinearRings of the shell and holes.
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clone
public java.lang.Object clone()
Deprecated.Creates and returns a full copy of thisPoint
object. (including all coordinates contained by it).
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reverse
public Geometry reverse()
Deprecated.Description copied from class:Geometry
Computes a new geometry which has all component coordinate sequences in reverse order (opposite orientation) to this one.
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normalize
public void normalize()
Description copied from class:Geometry
Converts thisGeometry
to normal form (or canonical form ). Normal form is a unique representation forGeometry
s. It can be used to test whether twoGeometry
s are equal in a way that is independent of the ordering of the coordinates within them. Normal form equality is a stronger condition than topological equality, but weaker than pointwise equality. The definitions for normal form use the standard lexicographical ordering for coordinates. "Sorted in order of coordinates" means the obvious extension of this ordering to sequences of coordinates.NOTE that this method mutates the value of this geometry in-place. If this is not safe and/or wanted, the geometry should be cloned prior to normalization.
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getCoordinateSequence
public CoordinateSequence getCoordinateSequence()
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