xdfopen

[Jennifer Adams]

Hi, Steve --
I added a mod to the 'dtype hdfsds' interface so it can handle byte 
data (in HDF parlance, the data types are DFNT_INT8 or DFNT_UINT8) for 
the next (1.9b4) release of GrADS. I don't know exactly when that 
release will be ready...
Jennifer


On Jan 17, 2005, at 7:10 PM, Ghan, Steven J wrote:

> I'm trying to open an hdf file using xdfopen.
>  I'm following the instructions, but I'm getting the following result:
>
> gradshdf
>  Grid Analysis and Display System (GrADS) Version 1.8SL11
>  Copyright (c) 1988-2001 by Brian Doty
>  Center for Ocean-Land-Atmosphere Studies
>  Institute for Global Environment and Society
>  All Rights Reserved
>  Config: v1.8SL11 32-bit little-endian readline sdf/xdf hdf-sds lats 
> printim
>  Issue 'q config' command for more information.
>  Landscape mode? (no for portrait):
>  GX Package Initialization: Size = 11 8.5
>  ga-> xdfopen A2002185.ddf
> Scanning Descriptor File:  A2002185.ddf
> SDF file has no discernable time coordinate.
>  Alleged lon dimension (from YDEF) is not an SDF dimension.  Cannot 
> continue.
>  Lon dimension name is:
>  YDim_MOD_CMG_Snow_5km
> Alleged lat dimension (from XDEF) is not an SDF dimension.  Cannot 
> continue.
>  Lat dimension name is:
>  XDim_MOD_CMG_Snow_5km
> Data file MYD10C2.A2002185.004.2004026093314.hdf was not successfully 
> opened & parsed.
>
> My ddf file has the following:
>
> DSET MYD10C2.A2002185.004.2004026093314.hdf
> TITLE July 3 2002
>  options yrev
>  UNDEF -2
>  YDEF YDim_MOD_CMG_Snow_5km 3600 LINEAR -89.975 0.05
>  XDEF XDim_MOD_CMG_Snow_5km 7200 LINEAR -179.975 0.05
>  VARS 1
>  Eight_Day_CMG_Snow_Cover=>snowcover 1 99 snow cover percent
>  ENDVARS
>
> The result of hdf ncdump applied to the hdf file is
>
>  netcdf MYD10C2.A2002185.004.2004026093314 {
>  dimensions:
>          YDim_MOD_CMG_Snow_5km = 3600 ;
>          XDim_MOD_CMG_Snow_5km = 7200 ;
>
> variables:
>          byte Eight_Day_CMG_Snow_Cover(YDim_MOD_CMG_Snow_5km, 
> XDim_MOD_CMG_Snow_5km) ;
>
> I am running linux redhat 7.3
>
> Any ideas what the problem might be, or what to try next?
>
> -Steve Ghan
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