org.deegree_impl.io.shpapi
Class SHP2WKS

java.lang.Object
  org.deegree_impl.io.shpapi.SHP2WKS

public class SHP2WKS

extends java.lang.Object

the class SHP2WKS transforms a polygon structure read from a shape-file
into a WKSLinearPolygon specified by the sf-specifications

Last changes:
14.12.1999 ap: import clauses added
08.02.2000 ap: method transformPoint(..) declared and implemented
21.03.2000 ap: method: transformMultiPoint(..) declared and implemented
21.03.2000 ap: method: transformPolyLine(..) declared and implemented

Version:

21.03.2000

Author:

Andreas Poth

Constructor Summary

SHP2WKS()

Method Summary

private boolean	ccw(SHPPoint[] ring)
private GM_Envelope	getRange(SHPPoint[] ring, int[] pts) method: getRange(LinearRing ring, int[] pts) returns the range envelope of a polygon. after calling getRange the array pts contains the indieces of the points corresponding to the left, top, right and bottom of the range envelope.
private boolean	isInsideRing(GM_Position[] ring, GM_Position point) method: private boolean isInsideRing(GM_Point[] ring, GM_Point point) checks if a point is inside a polygon. the algorithm is taken from: http://www.ics.uci.edu/~eppstein/161/960307.html#intest
GM_Point[]	transformMultiPoint(CS_CoordinateSystem srs, SHPMultiPoint shpmultipoint) method: GM_Point[] transformMultiPoint(CS_CoordinateSystem srs, SHPMultiPoint shpmultipoint)) transforms a SHPMultiPoint to a WKSGeometry gets a multipoint that should be transformed
GM_Point	transformPoint(CS_CoordinateSystem crs, SHPPoint shppoint) method: GM_Point transformPoint(CS_CoordinateSystem srs, SHPPoint shppoint)) transforms a SHPPoint to a WKSGeometry gets a point that should be transformed
GM_Surface[]	transformPolygon(CS_CoordinateSystem crs, SHPPolygon shppolygon) transforms the SHPPolygon to a WKSGeometry gets the polygon that should be transformed
GM_Curve[]	transformPolyLine(CS_CoordinateSystem crs, SHPPolyLine shppolyline) method: GM_Point[][] transformPolyLine(CS_CoordinateSystem srs, SHPPolyLine shppolyline)) transforms a SHPPolyLine to a WKSGeometry gets a polyline that should be transformed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SHP2WKS

public SHP2WKS()

Method Detail

transformPoint

public GM_Point transformPoint(CS_CoordinateSystem crs,
                               SHPPoint shppoint)

method: GM_Point transformPoint(CS_CoordinateSystem srs,
SHPPoint shppoint))
transforms a SHPPoint to a WKSGeometry
gets a point that should be transformed

transformMultiPoint

public GM_Point[] transformMultiPoint(CS_CoordinateSystem srs,
                                      SHPMultiPoint shpmultipoint)

method: GM_Point[] transformMultiPoint(CS_CoordinateSystem srs,
SHPMultiPoint shpmultipoint))
transforms a SHPMultiPoint to a WKSGeometry
gets a multipoint that should be transformed

transformPolyLine

public GM_Curve[] transformPolyLine(CS_CoordinateSystem crs,
                                    SHPPolyLine shppolyline)

method: GM_Point[][] transformPolyLine(CS_CoordinateSystem srs,
SHPPolyLine shppolyline))
transforms a SHPPolyLine to a WKSGeometry
gets a polyline that should be transformed

getRange

private GM_Envelope getRange(SHPPoint[] ring,
                             int[] pts)

method: getRange(LinearRing ring, int[] pts)
returns the range envelope of a polygon. after calling getRange
the array pts contains the indieces of the points corresponding
to the left, top, right and bottom of the range envelope.

ccw

private boolean ccw(SHPPoint[] ring)

Parameters:

ring -

Returns:

isInsideRing

private boolean isInsideRing(GM_Position[] ring,
                             GM_Position point)

method: private boolean isInsideRing(GM_Point[] ring, GM_Point point)
checks if a point is inside a polygon. the algorithm is taken from:
http://www.ics.uci.edu/~eppstein/161/960307.html#intest

transformPolygon

public GM_Surface[] transformPolygon(CS_CoordinateSystem crs,
                                     SHPPolygon shppolygon)

transforms the SHPPolygon to a WKSGeometry
gets the polygon that should be transformed