[R-sig-Geo] Problem reading a HDF5 file with readGDAL in Windows

Robert J. Hijmans r.hijmans at gmail.com
Tue May 5 19:24:21 CEST 2015


In which case you can change the extension to '.nc' and do

library(raster)
library(ncdf4)
x <- raster("E:/downloads/OMI.L2.CloudOMCLDO2Strip200kmAlongCloudSat.2015.05.05.020752Z.v003.nc",
var='Data Fields/ChiSquaredOfFit')

Robert

On Tue, May 5, 2015 at 5:28 AM, John Baumgartner <johnbaums at gmail.com> wrote:
> Not a remedy, but the following might be a workable alternative...
>
> ncdf4::nc_open("OMI.L2.CloudOMCLDO2Strip200kmAlongCloudSat.2015.05.05.020752Z.v003.he5")$var$`Data
> Fields/ChiSquaredOfFit`
>
> I'm not familiar with HDF5 structure, so not sure of possible downsides.
>
> Cheers,
> John
>
> On Tue, May 5, 2015 at 9:34 PM, Oscar Perpiñan <oscar.perpinan at gmail.com>
> wrote:
>
>> Hello,
>>
>> I am trying to read a HDF5 file whose variable name contains '//'. I have
>> no
>> problem in a Linux machine, but 'readGDAL' throws an error in Windows. If I
>> am not wrong, it is because the initialize method of the
>> 'GDALReadOnlyDataset'
>> class includes a call to 'normalizePath'.
>>
>> For example, the next code works in Linux but fails in Windows (it uses
>> this
>> file
>>
>> ftp://atrain.sci.gsfc.nasa.gov/data/s4pa//OMI/OMCLDO2_CPR.003/2015/125/OMI.L2.CloudOMCLDO2Strip200kmAlongCloudSat.2015.05.05.020752Z.v003.he5
>> )
>>
>> x <- readGDAL("HDF5:OMI.L2.CloudOMCLDO2Strip200kmAlongClo
>> udSat.2015.05.05.020752Z.v003.he5://HDFEOS/SWATHS/
>> CloudFractionAndPressure/Data_Fields/ChiSquaredOfFit")
>>
>> Is there any way to circumvent this problem?
>>
>> Thanks in advance.
>>
>> Oscar.
>> -----------------------------------------------------------------
>> Oscar Perpiñán Lamigueiro
>> Dpto. Ing. Eléctrica, Electrónica, Automática y Física Aplicada
>> (ETSIDI-UPM)
>> Grupo de Sistemas Fotovoltaicos (IES-UPM)
>> URL: http://oscarperpinan.github.io
>>
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>>
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>
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>
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