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<p class="MsoNormal">Even,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">There are some issues with this way.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My draft Julia function looks like bellow (tested with a MxNx7 array) but get this errors<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">julia> GMT.write_multiband(cube, "gd_cube.nc")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Warning 1: No 1D variable is indexed by dimension time<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Warning 6: creation option '-co' is not formatted with the key=value format<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Warning 6: creation option '-co' is not formatted with the key=value format<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Warning 6: creation option '-co' is not formatted with the key=value format<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ERROR 1: netcdf error #-45 : NetCDF: Not a valid data type or _FillValue type mismatch .<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">at (C:\programs\compa_libs\gdal_GIT\gdal\frmts\netcdf\netcdfdataset.cpp,netCDFDataset::CreateCopy,9012)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ERROR 1: netcdf error #-49 : NetCDF: Variable not found .<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">at (C:\programs\compa_libs\gdal_GIT\gdal\frmts\netcdf\netcdfdataset.cpp,NCDFPutAttr,10454)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Warning 1: No 1D variable is indexed by dimension time<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">And indeed the “time” variable shows up filled with 7 zeros when I open the nc file that is nevertheless created.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Also checked with getmetadataitem(ds, "NETCDF_DIM_time_VALUES") that the "1,2,3,4,5,6,7" info was correctly set.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’s also strange the warnings about the “-co” options also because they were in fact taken into account. Omitting them creates a classic nc file.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">function write_multiband(cube, fname::AbstractString, v=nothing; dim_name::String="time")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> nbands = size(cube,3)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> ds = gmt2gd(cube)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span>Gdal.setmetadataitem(ds, "NETCDF_DIM_EXTRA", dim_name)<o:p></o:p></p>
<p class="MsoNormal"> Gdal.setmetadataitem(ds, "NETCDF_DIM_" * dim_name * "_DEF", "$(nbands),6")<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> Gdal.setmetadataitem(ds, "NETCDF_DIM_" * dim_name * "_VALUES", "1,2,3,4,5,6,7")<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Gdal.setmetadataitem(ds, dim_name * "#axis", string(dim_name[1]))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> crs = Gdal.getproj(cube, wkt=true)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> (crs != "" ) && Gdal.setproj!(ds, crs)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Gdal.unsafe_copy(ds, filename=fname, driver=getdriver("netCDF"), options=["-co", "FORMAT=NC4", "-co", "COMPRESS=DEFLATE", "-co", "ZLEVEL=4"])<o:p></o:p></span></p>
<p class="MsoNormal">end<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:PT">From:</span></b><span lang="EN-US" style="mso-fareast-language:PT"> Even Rouault <even.rouault@spatialys.com>
<br>
<b>Sent:</b> Sunday, October 10, 2021 10:48 PM<br>
<b>To:</b> Joaquim Manuel Freire Luís <jluis@ualg.pt>; gdal-dev@lists.osgeo.org<br>
<b>Subject:</b> Re: [gdal-dev] Writing multi-bands vs multi-datasets<o:p></o:p></span></p>
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</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Joaquim,<span style="mso-fareast-language:PT"><o:p></o:p></span></p>
<p><a href="https://github.com/OSGeo/gdal/pull/4634">https://github.com/OSGeo/gdal/pull/4634</a> should hopefully help<o:p></o:p></p>
<p>Even<o:p></o:p></p>
<div>
<p class="MsoNormal">Le 10/10/2021 à 22:26, Joaquim Manuel Freire Luís a écrit :<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US">Hi,</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I have a Julia version of gdal_translate (that ends up calling GDALDatasetRasterIOEx) that works in saving a MxNxP array, but not the way I wanted.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">It creates a multi-subdatasets file, whilst what I wished is to write a multi-band file.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">For example, the file written with this Julia function looks like below</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">How can I write a multi-band instead of a multi-datasets?
</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’ve been looking at the docs of GDALDatasetRasterIOEx but can’t see any way of picking one or the other.</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Joaquim</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">gdalinfo cube_rad.nc</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Driver: netCDF/Network Common Data Format</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Files: cube_rad.nc</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Size is 512, 512</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Metadata:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#Conventions=CF-1.5</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#GDAL=GDAL 3.4.0dev, released 2021/99/99</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#history=Sun Oct 10 13:01:06 2021: GDAL CreateCopy( cube_rad.nc, ... )</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Subdatasets:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> SUBDATASET_1_NAME=NETCDF:"cube_rad.nc":Band1</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> SUBDATASET_1_DESC=[1567x1519] Band1 (32-bit floating-point)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> SUBDATASET_2_NAME=NETCDF:"cube_rad.nc":Band2</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> SUBDATASET_2_DESC=[1567x1519] Band2 (32-bit floating-point)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">…</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Saving the same data (or similar) from a Matlab code that I wrote long ago to stack grids, shows</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">gdalinfo evi_cube.nc</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Driver: netCDF/Network Common Data Format</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Files: evi_cube.nc</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Size is 37, 59</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Origin = (580140.000000000000000,4418550.000000000000000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Pixel Size = (30.000000000000000,-30.000000000000000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Metadata:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">…</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> latitude#actual_range={4416795,4418535}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> latitude#long_name=latitude</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> latitude#units=degrees_north</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> longitude#actual_range={580155,581235}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> longitude#long_name=longitude</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> longitude#units=degrees_east</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#Conventions=COARDS</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#description=File written from Matlab</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#node_offset=0</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#Source_Software=Mirone</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NC_GLOBAL#title=Grid created by Mirone</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_DIM_EXTRA={time}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_DIM_time_DEF={67,6}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_DIM_time_VALUES={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> z#actual_range={-856.4703369140625,176.8457641601562}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> z#long_name=z</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> z#units=unknown</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> z#_FillValue=-nan(ind)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Corner Coordinates:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Upper Left ( 580140.000, 4418550.000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Lower Left ( 580140.000, 4416780.000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Upper Right ( 581250.000, 4418550.000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Lower Right ( 581250.000, 4416780.000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Center ( 580695.000, 4417665.000)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Band 1 Block=37x59 Type=Float32, ColorInterp=Undefined</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NoData Value=nan</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> Unit Type: unknown</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> Metadata:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> actual_range={-856.4703369140625,176.8457641601562}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> long_name=z</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_DIM_time=1</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_VARNAME=z</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> units=unknown</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> _FillValue=-nan(ind)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Band 2 Block=37x59 Type=Float32, ColorInterp=Undefined</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NoData Value=nan</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> Unit Type: unknown</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> Metadata:</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> actual_range={-856.4703369140625,176.8457641601562}</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> long_name=z</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_DIM_time=2</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> NETCDF_VARNAME=z</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> units=unknown</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> _FillValue=-nan(ind)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">…</span><o:p></o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:PT"><br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gdal-dev mailing list<o:p></o:p></pre>
<pre><a href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a><o:p></o:p></pre>
<pre><a href="https://lists.osgeo.org/mailman/listinfo/gdal-dev">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a><o:p></o:p></pre>
</blockquote>
<pre>-- <o:p></o:p></pre>
<pre><a href="http://www.spatialys.com">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
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