Re: [gdal-dev] GDAL 1.8.0 and MrSid "no-data" values

2011-05-15 Thread Oyvind Idland
Hi, The file I'm using is actually MG2, using only 3 bands. Note, thats its the same file I used for testing in 1.7.x aswell. - Oyvind On Fri, May 13, 2011 at 4:08 PM, Kirk McKelvey wrote: > Is this with MG3 or MG4 files? MG4 uses an alpha channel instead of > nodata, so what you describe w

Re: [gdal-dev] Attempting to merge DEMs with gdal_merge.py - getting Float32 clipped to 255.0

2011-05-15 Thread Chaitanya kumar CH
Michal, Check if the output file already exists. The script won't create a new one if it already exists. On Mon, May 16, 2011 at 12:45 AM, Michal Migurski wrote: > Hello, > > I'm attempting to merge a number of DEMs in .flt format using > gdal_merge.py. It's NED 1/3 arc second data, so each one

[gdal-dev] Attempting to merge DEMs with gdal_merge.py - getting Float32 clipped to 255.0

2011-05-15 Thread Michal Migurski
Hello, I'm attempting to merge a number of DEMs in .flt format using gdal_merge.py. It's NED 1/3 arc second data, so each one is a Float32 10812x10812 raster with a range of values from a few meters below sea level to 1.4km. I'm getting back an image with an incorrect datatype even though I bel

Re: [gdal-dev] How to get the ENVISAT N1 Main Processing parameters

2011-05-15 Thread Antonio Valentino
Hi RSyaoxin, Il 15/05/2011 14:46, RSyaoxin ha scritto: > Hi,I want to calibration the ENVISAT ASAR DATA(.N1 Format). I need to get > it's main processing parameters,such as > calibration_factors[0].ext_cal_fact[0],first_line_tie_point_angles[0-10],and > I wrote: CString > sDomain=m_pDataset->GetMe

[gdal-dev] How to get the ENVISAT N1 Main Processing parameters

2011-05-15 Thread RSyaoxin
Hi,I want to calibration the ENVISAT ASAR DATA(.N1 Format). I need to get it's main processing parameters,such as calibration_factors[0].ext_cal_fact[0],first_line_tie_point_angles[0-10],and I wrote: CString sDomain=m_pDataset->GetMetadataItem("MAIN_PROCESSING_PARAMS_ADS_CALIBRATION_FACTORS[0].EXT_