[Qgis-user] GDAL and .nc (netCDF) and qgis

[M.E.Dodd]

I've now been able to open the data in VCDAT (Xterm on mac) and it is the correct way up, so possibly a bug in the way qgis/gdal (on windowsXP pc) handles .nc files. The files are quite large 1gb+ if this makes a difference.



On Tue, Jan 12, 2010 at 11:04 AM, M.E.Dodd <M.E.Dodd at open.ac.uk> wrote:
> Thanks for the replies on this one.
> I am indeed looking at other tools to open netCDF files.
> However I just noticed that in qgis 1.4 there is a .nc option (well two actually presumably different formats) when opening a raster image.  So I tried it, unfortunately the file opened upside down and possibly a little smaller than it should have done.
> Has anyone else used this in qgis to confirm the qgis part is working OK so I can go back to the data provider and check the original data itself.
>
> -----Original Message-----
> From: Mike Toews [mailto:mwtoews at sfu.ca]
> Sent: 07 January 2010 18:19
> To: M.E.Dodd
> Cc: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] GDAL and .nc (netCDF) and qgis
>
> M.E.Dodd wrote:
>> I would like to open some large gridded met data files, produce means of the values for each grid square (data for each square are given each year for a number of years and I want a mean of all the years) and write the data out again showing just the means per grid square.
>>
>
> I would look at other tools for doing calculations on multi-dimensional
> NetCDF files. I've used NCO in the past for this,[1] which can average a
> time dimension in a 3D grid to produce a 2D grid (which can be converted
> to any other raster format using GDAL). You can do much more with NCO
> utilities. However, NCO is not user-friendly, since it is command-line
> work, requires a lot of documentation reading to understand the usage,
> and is available for almost all operating systems except MS Windows.
>
> [1] http://nco.sourceforge.net
>
> -Mike
>
>
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