MultiSurface.cs
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- // Copyright 2005, 2006 - Morten Nielsen (www.iter.dk)
- //
- // This file is part of SharpMap.
- // SharpMap is free software; you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation; either version 2 of the License, or
- // (at your option) any later version.
- //
- // SharpMap is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- // You should have received a copy of the GNU Lesser General Public License
- // along with SharpMap; if not, write to the Free Software
- // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- using System;
- using System.Collections.Generic;
- using System.Text;
- namespace SharpMap.Geometries
- {
- /// <summary>
- /// A MultiSurface is a two-dimensional geometric collection whose elements are surfaces. The interiors of any
- /// two surfaces in a MultiSurface may not intersect. The boundaries of any two elements in a MultiSurface may
- /// intersect at most at a finite number of points.
- /// </summary>
- /// <remarks>
- /// MultiSurface is a non-instantiable class in this specification, it defines a set of methods for its subclasses and
- /// is included for reasons of extensibility. The instantiable subclass of MultiSurface is MultiPolygon,
- /// corresponding to a collection of Polygons.
- /// </remarks>
- public abstract class MultiSurface : GeometryCollection
- {
- /// <summary>
- /// The area of this Surface, as measured in the spatial reference system of this Surface.
- /// </summary>
- public abstract double Area { get; }
- /// <summary>
- /// The mathematical centroid for this Surface as a Point.
- /// The result is not guaranteed to be on this Surface.
- /// </summary>
- public abstract Point Centroid { get; }
- /// <summary>
- /// A point guaranteed to be on this Surface.
- /// </summary>
- public abstract Point PointOnSurface { get; }
- /// <summary>
- /// The inherent dimension of this Geometry object, which must be less than or equal to the coordinate dimension.
- /// </summary>
- public override int Dimension
- {
- get { return 2; }
- }
- }
- }