1\將兩個Geometry對象合並為一個新的Geometry對象，其中GeometryA的值會被修改

/// </summary>
/// <param name="GeometryA">要合並的一個Geometry</param>
/// <param name="GeometryB">要合並的另一個Geometry</param>
/// <returns>合並後的Geometry</returns>
public static IGeometry UnionTwoGeometries(IGeometry GeometryA, IGeometry GeometryB)
{
    ITopologicalOperator pTopologicalOperator 
 
= GeometryA as ITopologicalOperator;
    IGeometry UnionGeometry = pTopologicalOperator.Union(GeometryB);
    return UnionGeometry;
}

常用空間分析代碼