/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
* (C) 2003-2005, Open Geospatial Consortium Inc.
*
* All Rights Reserved. http://www.opengis.org/legal/
*/
package org.opengis.geometry.coordinate;
import java.util.List;
import java.util.Set;
import org.opengis.annotation.UML;
import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;
/**
* A triangulated surface that uses the Delaunay algorithm or a similar algorithm complemented
* with consideration for breaklines, stoplines and maximum length of triangle sides. These
* networks satisfy the Delaunay criterion away from the modifications: For each triangle in
* the network, the circle passing through its vertexes does not contain, in its interior, the
* vertex of any other triangle.
*
*
* @source $URL: http://svn.osgeo.org/geotools/trunk/modules/library/opengis/src/main/java/org/opengis/geometry/coordinate/Tin.java $
* @version <A HREF="http://www.opengeospatial.org/standards/as">ISO 19107</A>
* @author Martin Desruisseaux (IRD)
* @since GeoAPI 2.0
*
* @see GeometryFactory#createTin
*/
@UML(identifier="GM_Tin", specification=ISO_19107)
public interface Tin extends TriangulatedSurface {
/**
* Stoplines are lines where the local continuity or regularity of the surface is questionable.
* In the area of these pathologies, triangles intersecting a stopline shall be removed from
* the TIN surface, leaving holes in the surface. If coincidence occurs on surface boundary
* triangles, the result shall be a change of the surface boundary. The attribute
* {@code stopLines} contains all these pathological segments as a set of line strings.
*/
@UML(identifier="stopLines", obligation=MANDATORY, specification=ISO_19107)
Set<LineString> getStopLines();
/**
* Breaklines are lines of a critical nature to the shape of the surface, representing local
* ridges, or depressions (such as drainage lines) in the surface. As such their constituent
* segments must be included in the TIN even if doing so violates the Delaunay criterion. The
* attribute {@code breakLines} contains these critical segments as a set of line strings.
*/
@UML(identifier="breakLines", obligation=MANDATORY, specification=ISO_19107)
Set<LineString> getBreakLines();
/**
* Maximal length for retention.
* Areas of the surface where the data is not sufficiently dense to assure reasonable
* calculations shall be removed by adding a retention criterion for triangles based
* on the length of their sides. For any triangle sides exceeding maximum length, the
* adjacent triangles to that triangle side shall be removed from the surface.
*/
@UML(identifier="maxLength", obligation=MANDATORY, specification=ISO_19107)
double getMaxLength();
/**
* The corners of the triangles in the TIN are often referred to as posts. The attribute
* {@code controlPoint} shall contain a set of the {@linkplain Position positions} used
* as posts for this TIN. Since each TIN contains triangles, there must be at least 3 posts.
* The order in which these points are given does not affect the surface that is represented.
* Application schemas may add information based on the ordering of the control points to
* facilitate the reconstruction of the TIN from the control points.
*/
@UML(identifier="controlPoint", obligation=MANDATORY, specification=ISO_19107)
List<Position> getControlPoints();
}