[求助]IRasterWorkspace2创建栅格数据集求助

<P>我想创建一个带有空间参考的tiff文件.采用如下的代码:</P>
<P>ISpatialReferenceFactory2 ipSRFactory = new SpatialReferenceEnviroment() as  I  SpatialReferenceFactory2;</P>
<P>ISpatialReference ipSR = ipSRFactory.CreateGeographicCoordinateSystem((int) esriSRGeoCS_Beijing1954);</P>
<P>IRasterDataset ipRstDT = ipRstWS2.CreateRasterDataset(strFilename, "TIFF", m_ipPtTL, m_colmnCount, m_rowCount, m_cellsizeX, m_cellsizeY, 1, rstPixelType.PT_UCHAR, ipSR, trye);</P>
<P>执行后产生的栅格数据在catalog中查看属性,却发现仍然没有地理参考,左思右想也不知道原因,希望各位不吝指教.谢谢</P>

<P>对了，是ArcEngine9.1的版本</P>