LineString

java.lang.Object
- com.vividsolutions.jts.geom.Geometry
- - com.vividsolutions.jts.geom.LineString

All Implemented Interfaces:

Lineal, Serializable, Cloneable, Comparable

Direct Known Subclasses:

LinearRing
```
public class LineString
extends Geometry
implements Lineal
```
Models an OGC-style LineString. A LineString consists of a sequence of two or more vertices, along with all points along the linearly-interpolated curves (line segments) between each pair of consecutive vertices. Consecutive vertices may be equal. The line segments in the line may intersect each other (in other words, the linestring may "curl back" in itself and self-intersect. Linestrings with exactly two identical points are invalid.
A linestring must have either 0 or 2 or more points. If these conditions are not met, the constructors throw an IllegalArgumentException

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
`protected CoordinateSequence`	`points` The points of this `LineString`.

Fields inherited from class com.vividsolutions.jts.geom.Geometry
envelope, factory, SRID

Constructor Summary

Constructors

Constructor and Description
`LineString(Coordinate[] points, PrecisionModel precisionModel, int SRID)` Deprecated. Use GeometryFactory instead
`LineString(CoordinateSequence points, GeometryFactory factory)` Constructs a `LineString` with the given points.

Method Summary

All Methods

Instance Methods

Concrete Methods
Modifier and Type	Method and Description
`void`	`apply(CoordinateFilter filter)` Performs an operation with or on this `Geometry`'s coordinates.
`void`	`apply(CoordinateSequenceFilter filter)` Performs an operation on the coordinates in this `Geometry`'s `CoordinateSequence`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 this `Geometry` and its subelement `Geometry`s (if any).
`Object`	`clone()` Creates and returns a full copy of this `LineString` object.
`protected int`	`compareToSameClass(Object o)` Returns whether this `Geometry` is greater than, equal to, or less than another `Geometry` having the same class.
`protected int`	`compareToSameClass(Object o, CoordinateSequenceComparator comp)` Returns whether this `Geometry` is greater than, equal to, or less than another `Geometry` of the same class.
`protected Envelope`	`computeEnvelopeInternal()` Returns the minimum and maximum x and y values in this `Geometry` , or a null `Envelope` if this `Geometry` is empty.
`boolean`	`equalsExact(Geometry other, double tolerance)` Returns true if the two `Geometry`s are exactly equal, up to a specified distance tolerance.
`Geometry`	`getBoundary()` Gets the boundary of this geometry.
`int`	`getBoundaryDimension()` Returns the dimension of this `Geometry`s inherent boundary.
`Coordinate`	`getCoordinate()` Returns a vertex of this `Geometry` (usually, but not necessarily, the first one).
`Coordinate`	`getCoordinateN(int n)`
`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.
`Point`	`getEndPoint()`
`String`	`getGeometryType()` Returns the name of this Geometry's actual class.
`double`	`getLength()` Returns the length of this `LineString`
`int`	`getNumPoints()` Returns the count of this `Geometry`s vertices.
`Point`	`getPointN(int n)`
`Point`	`getStartPoint()`
`boolean`	`isClosed()`
`boolean`	`isCoordinate(Coordinate pt)` Returns true if the given point is a vertex of this `LineString`.
`boolean`	`isEmpty()` Tests whether the set of points covered by this `Geometry` is empty.
`protected boolean`	`isEquivalentClass(Geometry other)` Returns whether the two `Geometry`s are equal, from the point of view of the `equalsExact` method.
`boolean`	`isRing()`
`void`	`normalize()` Normalizes a LineString.
`Geometry`	`reverse()` Creates a `LineString` whose coordinates are in the reverse order of this objects

Methods inherited from class com.vividsolutions.jts.geom.Geometry
buffer, buffer, buffer, checkNotGeometryCollection, compare, compareTo, compareTo, contains, convexHull, coveredBy, covers, crosses, difference, disjoint, distance, equal, equals, equals, equalsExact, equalsNorm, equalsTopo, geometryChanged, geometryChangedAction, getArea, getCentroid, getEnvelope, getEnvelopeInternal, getFactory, getGeometryN, getInteriorPoint, getNumGeometries, getPrecisionModel, getSRID, getUserData, hashCode, hasNonEmptyElements, hasNullElements, intersection, intersects, isGeometryCollection, isRectangle, isSimple, isValid, isWithinDistance, norm, overlaps, relate, relate, setSRID, setUserData, symDifference, toString, toText, touches, union, union, within

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - points
```
protected CoordinateSequence points
```
    The points of this LineString.
- Constructor Detail
  - LineString
```
public LineString(Coordinate[] points,
                  PrecisionModel precisionModel,
                  int SRID)
```
    Deprecated. Use GeometryFactory instead
  - LineString
```
public LineString(CoordinateSequence points,
                  GeometryFactory factory)
```
    Constructs a LineString with the given points.
    
    Parameters:
    
    points - the points of the linestring, or null to create the empty geometry.
    
    Throws:
    
    IllegalArgumentException - if too few points are provided
- Method Detail
  - 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 class Geometry
    
    Returns:
    
    the vertices of this Geometry
    
    See Also:
    
    Geometry.geometryChanged(), CoordinateSequence.setOrdinate(int, int, double)
  - getCoordinateSequence
```
public CoordinateSequence getCoordinateSequence()
```
  - getCoordinateN
```
public Coordinate getCoordinateN(int n)
```
  - getCoordinate
```
public Coordinate getCoordinate()
```
    Description copied from class: Geometry
    
    Returns a vertex of this Geometry (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 class Geometry
    
    Returns:
    
    a Coordinate which is a vertex of this Geometry.
  - 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 Coordinates. 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 class Geometry
    
    Returns:
    
    the topological dimension of this geometry.
  - getBoundaryDimension
```
public int getBoundaryDimension()
```
    Description copied from class: Geometry
    
    Returns the dimension of this Geometrys inherent boundary.
    
    Specified by:
    
    getBoundaryDimension in class Geometry
    
    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.
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from class: Geometry
    
    Tests whether the set of points covered by this Geometry is empty.
    
    Specified by:
    
    isEmpty in class Geometry
    
    Returns:
    
    true if this Geometry does not cover any points
  - getNumPoints
```
public int getNumPoints()
```
    Description copied from class: Geometry
    
    Returns the count of this Geometrys vertices. The Geometry s contained by composite Geometrys must be Geometry's; that is, they must implement getNumPoints
    
    Specified by:
    
    getNumPoints in class Geometry
    
    Returns:
    
    the number of vertices in this Geometry
  - getPointN
```
public Point getPointN(int n)
```
  - getStartPoint
```
public Point getStartPoint()
```
  - getEndPoint
```
public Point getEndPoint()
```
  - isClosed
```
public boolean isClosed()
```
  - isRing
```
public boolean isRing()
```
  - getGeometryType
```
public String getGeometryType()
```
    Description copied from class: Geometry
    
    Returns the name of this Geometry's actual class.
    
    Specified by:
    
    getGeometryType in class Geometry
    
    Returns:
    
    the name of this Geometrys actual class
  - getLength
```
public double getLength()
```
    Returns the length of this LineString
    
    Overrides:
    
    getLength in class Geometry
    
    Returns:
    
    the length of the linestring
  - getBoundary
```
public Geometry getBoundary()
```
    Gets the boundary of this geometry. The boundary of a lineal geometry is always a zero-dimensional geometry (which may be empty).
    
    Specified by:
    
    getBoundary in class Geometry
    
    Returns:
    
    the boundary geometry
    
    See Also:
    
    Geometry.getBoundary()
  - reverse
```
public Geometry reverse()
```
    Creates a LineString whose coordinates are in the reverse order of this objects
    
    Specified by:
    
    reverse in class Geometry
    
    Returns:
    
    a LineString with coordinates in the reverse order
  - isCoordinate
```
public boolean isCoordinate(Coordinate pt)
```
    Returns true if the given point is a vertex of this LineString.
    
    Parameters:
    
    pt - the Coordinate to check
    
    Returns:
    
    true if pt is one of this LineString 's vertices
  - computeEnvelopeInternal
```
protected Envelope computeEnvelopeInternal()
```
    Description copied from class: Geometry
    
    Returns the minimum and maximum x and y values in this Geometry , or a null Envelope if this Geometry is empty. Unlike getEnvelopeInternal, this method calculates the Envelope each time it is called; getEnvelopeInternal caches the result of this method.
    
    Specified by:
    
    computeEnvelopeInternal in class Geometry
    
    Returns:
    
    this Geometrys bounding box; if the Geometry is empty, Envelope#isNull will return true
  - equalsExact
```
public boolean equalsExact(Geometry other,
                           double tolerance)
```
    Description copied from class: Geometry
    Returns true if the two Geometrys 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.
    This method does not test the values of the GeometryFactory, the SRID, or the userData fields.
    To properly test equality between different geometries, it is usually necessary to Geometry.normalize() them first.
    Specified by:
    
    equalsExact in class Geometry
    
    Parameters:
    
    other - the Geometry with which to compare this Geometry
    
    tolerance - distance at or below which two Coordinates are considered equal
    
    Returns:
    
    true if this and the other Geometry have identical structure and point values, up to the distance tolerance.
    
    See Also:
    
    Geometry.equalsExact(Geometry), Geometry.normalize(), Geometry.norm()
  - apply
```
public void apply(CoordinateFilter filter)
```
    Description copied from class: Geometry
    
    Performs an operation with or on this Geometry'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).
    
    Specified by:
    
    apply in class Geometry
    
    Parameters:
    
    filter - the filter to apply to this Geometry's coordinates
  - apply
```
public void apply(CoordinateSequenceFilter filter)
```
    Description copied from class: Geometry
    
    Performs an operation on the coordinates in this Geometry's CoordinateSequences. If the filter reports that a coordinate value has been changed, Geometry.geometryChanged() will be called automatically.
    
    Specified by:
    
    apply in class Geometry
    
    Parameters:
    
    filter - the filter to apply
  - apply
```
public void apply(GeometryFilter filter)
```
    Description copied from class: Geometry
    
    Performs an operation with or on this Geometry and its subelement Geometrys (if any). Only GeometryCollections and subclasses have subelement Geometry's.
    
    Specified by:
    
    apply in class Geometry
    
    Parameters:
    
    filter - the filter to apply to this Geometry (and its children, if it is a GeometryCollection).
  - 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.
    
    Specified by:
    
    apply in class Geometry
    
    Parameters:
    
    filter - the filter to apply to this Geometry.
  - clone
```
public Object clone()
```
    Creates and returns a full copy of this LineString object. (including all coordinates contained by it).
    
    Overrides:
    
    clone in class Geometry
    
    Returns:
    
    a clone of this instance
  - normalize
```
public void normalize()
```
    Normalizes a LineString. A normalized linestring has the first point which is not equal to it's reflected point less than the reflected point.
  - isEquivalentClass
```
protected boolean isEquivalentClass(Geometry other)
```
    Description copied from class: Geometry
    
    Returns whether the two Geometrys are equal, from the point of view of the equalsExact method. Called by equalsExact . In general, two Geometry classes are considered to be "equivalent" only if they are the same class. An exception is LineString , which is considered to be equivalent to its subclasses.
    
    Overrides:
    
    isEquivalentClass in class Geometry
    
    Parameters:
    
    other - the Geometry with which to compare this Geometry for equality
    
    Returns:
    
    true if the classes of the two Geometry s are considered to be equal by the equalsExact method.
  - compareToSameClass
```
protected int compareToSameClass(Object o)
```
    Description copied from class: Geometry
    
    Returns whether this Geometry is greater than, equal to, or less than another Geometry having the same class.
    
    Specified by:
    
    compareToSameClass in class Geometry
    
    Parameters:
    
    o - a Geometry having the same class as this Geometry
    
    Returns:
    
    a positive number, 0, or a negative number, depending on whether this object is greater than, equal to, or less than o, as defined in "Normal Form For Geometry" in the JTS Technical Specifications
  - compareToSameClass
```
protected int compareToSameClass(Object o,
                                 CoordinateSequenceComparator comp)
```
    Description copied from class: Geometry
    
    Returns whether this Geometry is greater than, equal to, or less than another Geometry of the same class. using the given CoordinateSequenceComparator.
    
    Specified by:
    
    compareToSameClass in class Geometry
    
    Parameters:
    
    o - a Geometry having the same class as this Geometry
    
    comp - a CoordinateSequenceComparator
    
    Returns:
    
    a positive number, 0, or a negative number, depending on whether this object is greater than, equal to, or less than o, as defined in "Normal Form For Geometry" in the JTS Technical Specifications

Class LineString

Field Summary

Fields

Fields inherited from class com.vividsolutions.jts.geom.Geometry

Constructor Summary

Constructors

Method Summary

Methods inherited from class com.vividsolutions.jts.geom.Geometry

Methods inherited from class java.lang.Object

Field Detail

points

Constructor Detail

LineString

LineString

Method Detail

getCoordinates

getCoordinateSequence

getCoordinateN

getCoordinate

getDimension

getBoundaryDimension

isEmpty

getNumPoints

getPointN

getStartPoint

getEndPoint

isClosed

isRing

getGeometryType

getLength

getBoundary

reverse

isCoordinate

computeEnvelopeInternal

equalsExact

apply

apply

apply

apply

clone

normalize

isEquivalentClass

compareToSameClass

compareToSameClass