Hi, when I use gdal_translate to convert a raster file (e.g., either GTiff or VRT) into netCDF format, it always loses some important metadata items such as scale_factor, add_offset and etc. What am I doing it wrong? Can anyone help me to solve this problem?
Here I'm using an example NetCDF file from NOAA <ftp://ftp.cdc.noaa.gov/Datasets/cmap/std/precip.mon.mean.nc> called " precip.mon.mean.nc " to demo the problem. First convert one band of the netCDF file into a GTiff file. $ gdal_translate -of GTiff -b 1 precip.mon.mean.nc precip.mon.mean.b1.tif $ gdalinfo precip.mon.mean.b1.tif It returns the following 16 metadata items for the band in the following, Band 1 Block=144x14 Type=Float32, ColorInterp=Gray NoData Value=-9.96920996838686905e+36 Unit Type: mm/day Metadata: actual_range={0,59.080002} add_offset=0 dataset=CPC Merged Analysis of Precipitation Standard least_significant_digit=2 level_desc=Surface long_name=Average Monthly Rate of Precipitation missing_value=-9.96921e+36 NETCDF_DIM_time=1569072 NETCDF_VARNAME=precip parent_stat=Mean precision=2 scale_factor=1 statistic=Mean units=mm/day valid_range={0,70} var_desc=Precipitation Now convert the GTiff back into a netCDF file $ gdal_translate -of netCDF precip.mon.mean.b1.tif precip.mon.mean.b1.nc $ gdalinfo precip.mon.mean.b1.nc Now it returns only 12 metadata items which miss some particular important ones such as scale_factor, add_offset, and etc. Band 1 Block=144x1 Type=Float32, ColorInterp=Undefined NoData Value=-9.96920996838686905e+36 Unit Type: mm/day Metadata: actual_range={0,59.080002} dataset=CPC Merged Analysis of Precipitation Standard least_significant_digit=2 level_desc=Surface long_name=Average Monthly Rate of Precipitation NETCDF_VARNAME=precip parent_stat=Mean precision=2 statistic=Mean units=mm/day var_desc=Precipitation _FillValue=-9.96921e+36 Thanks, Zhan. -- Zhan Li <https://zhanlilz.github.io/>, 李展; Google Scholar <https://scholar.google.com/citations?user=JGNL9BoAAAAJ&hl=en>, ORCID <https://orcid.org/0000-0001-6307-5200>, Github <https://github.com/zhanlilz>, Twitter <https://twitter.com/zhanlilz>, LinkedIn <https://www.linkedin.com/in/zhanli/>
_______________________________________________ gdal-dev mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/gdal-dev
