// 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
namespace GeoAPI.CoordinateSystems{
/// <summary>
/// A set of quantities from which other quantities are calculated.
/// </summary>
/// <remarks>
/// For the OGC abstract model, it can be defined as a set of real points on the earth
/// that have coordinates. EG. A datum can be thought of as a set of parameters
/// defining completely the origin and orientation of a coordinate system with respect
/// to the earth. A textual description and/or a set of parameters describing the
/// relationship of a coordinate system to some predefined physical locations (such
/// as center of mass) and physical directions (such as axis of spin). The definition
/// of the datum may also include the temporal behavior (such as the rate of change of
/// the orientation of the coordinate axes).
/// </remarks>
public interface IDatum : IInfo
{
/// <summary>
/// Gets or sets the type of the datum as an enumerated code.
/// </summary>
DatumType DatumType { get; set; }
}
}
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