[gdal-dev] Error in OSGeo.GDAL.Gdal.Open for .tif format

[Zhenyu Lu]

Hi Group,

I just encountered an error in writting data to image in GTiff format using
the OSGeo.GDAL.Gdal.Open command. The error message showing is "****.tif
not recognised as a supported file format". The gdal librarary I am using
is gdal19dev.dll. The weird thing is the Gdal.Open command worked if the
image is in the format of HFA. The C# code I used to implement the writting
process is attached below (the sentence where error happened was
highlighted in red):
         /// <summary>
        /// Function of  WriteData2File
        /// </summary>
        /// <param name="LCx">the column index of left corner</param>
        /// <param name="LCy">the row index of left corner</param>
        /// <param name="width">the width of the rectangle</param>
        /// <param name="height">the length of the rectangle</param>
        /// <param name="fileName">the fileName where the data will be
saved</param>
        /// <returns>true, if the data is added correctly, false
otherwise.</returns>
        public bool WriteData2File(int LCx, int LCy, int width, int height,
int band, byte[] Data, string fileName)
        {
            OSGeo.GDAL.Driver imgDriver =
OSGeo.GDAL.Gdal.GetDriverByName("GTiff");
            string extension = System.IO.Path.GetExtension(fileName);
            if (extension == ".img")
                imgDriver = OSGeo.GDAL.Gdal.GetDriverByName("HFA");
            if (imgDriver == null)
                throw new Exception("The file type is not supported!");
            // OSGeo.GDAL.Gdal.AllRegister();
            OSGeo.GDAL.Dataset ds = OSGeo.GDAL.Gdal.Open(fileName,
OSGeo.GDAL.Access.GA_Update);
            int[] bandMap = new int[] { 1, 1, 1, 1 };
            try
            {
                ds.WriteRaster(LCx, LCy, width, height, Data, width,
height, 1, bandMap, 0, 0, 0);
                //ds.WriteRaster(LCx, LCy, width, height, Data, width,
height, band, 0, 0, 0);
                ds.Dispose();
                return true;
            }
            catch
            {
                return false;
            }
        }

Can anyone point out where the problem is? Thank you so much,


-- 
Zhenyu Lu
SUNY-ESF
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