/// <summary>
/// 检查坐标范围
/// </summary>
/// <param name="extent"></param>
/// <returns></returns>
public bool CheckCoordinateExtent(CoordinateExtent coordinateExtent)
{
if (coordinateExtent == null)
{
return(false);
}
if (coordinateExtent.MinX < this.MIN_X)
{
return(false);
}
if (coordinateExtent.MinY < this.MIN_Y)
{
return(false);
}
if (coordinateExtent.MaxX > this.MAX_X)
{
return(false);
}
if (coordinateExtent.MaxY > this.MAX_Y)
{
return(false);
}
return(true);
}
/// <summary>
/// 纠正坐标范围(如果在合理范围内,则返回原值;如果超出边界,则舍弃边界以外的部分。)
/// </summary>
/// <param name="coordinateExtent"></param>
/// <returns></returns>
public CoordinateExtent CorrectCoordianteExtent(CoordinateExtent coordinateExtent)
{
if (coordinateExtent == null)
{
return(new CoordinateExtent(this.PROJECTION_TYPE, this.MIN_X, this.MIN_Y, this.MAX_X, this.MAX_Y));
}
if (coordinateExtent.MinX < this.MIN_X)
{
coordinateExtent.MinX = this.MIN_X;
}
if (coordinateExtent.MinY < this.MIN_Y)
{
coordinateExtent.MinY = this.MIN_Y;
}
if (coordinateExtent.MaxX > this.MAX_X)
{
coordinateExtent.MaxX = this.MAX_X;
}
if (coordinateExtent.MaxY > this.MAX_Y)
{
coordinateExtent.MaxY = this.MAX_Y;
}
return(coordinateExtent);
}
/// <summary>
/// 获取默认的坐标范围
/// </summary>
/// <returns></returns>
public CoordinateExtent GetDefaultCoordinateExtent()
{
CoordinateExtent extent = new CoordinateExtent();
extent.ProjType = this.PROJECTION_TYPE;
extent.MinX = this.MIN_X;
extent.MinY = this.MIN_Y;
extent.MaxX = this.MAX_X;
extent.MaxY = this.MAX_Y;
return(extent);
}