IProjection.cs
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上传日期:2013-11-09
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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.CoordinateSystems
- {
- /// <summary>
- /// The IProjection interface defines the standard information stored with projection
- /// objects. A projection object implements a coordinate transformation from a geographic
- /// coordinate system to a projected coordinate system, given the ellipsoid for the
- /// geographic coordinate system. It is expected that each coordinate transformation of
- /// interest, e.g., Transverse Mercator, Lambert, will be implemented as a COM class of
- /// coType Projection, supporting the IProjection interface.
- /// </summary>
- public interface IProjection : IInfo
- {
- /// <summary>
- /// Gets number of parameters of the projection.
- /// </summary>
- int NumParameters { get; }
- /// <summary>
- /// Gets the projection classification name (e.g. 'Transverse_Mercator').
- /// </summary>
- string ClassName { get; }
- /// <summary>
- /// Gets an indexed parameter of the projection.
- /// </summary>
- /// <param name="n">Index of parameter</param>
- /// <returns>n'th parameter</returns>
- ProjectionParameter GetParameter(int n);
- /// <summary>
- /// Gets an named parameter of the projection.
- /// </summary>
- /// <remarks>The parameter name is case insensitive</remarks>
- /// <param name="name">Name of parameter</param>
- /// <returns>parameter or null if not found</returns>
- ProjectionParameter GetParameter(string name);
- }
- }