[gdal-dev] NITF TRE support

[Kurt Landrus]

Ok thanks for your reply. I downloaded the beta, and updated my code  
to use the options in the create fcn.
I am now getting an error from the driver on the create call, for the  
options.
I am creating the option with the TRE  in the same format as loaded   
using GDAL.

### saving TRE SENSRA = FSBS2    +35.000000-077.000000B+01200f      
+74.998+000.000+014.996+70.000+009.998010.0N0020.0f075.0+1020m
### treContents = TRE=SENSRA,FSBS2    +35.000000-077.000000B 
+01200f      
+74.998+000.000+014.996+70.000+009.998010.0N0020.0f075.0+1020m
ERROR 1: Could not parse creation options SENSRA,FSBS2     
+35.000000-077.000000B+01200f      
+74.998+000.000+014.996+70.000+009.998010.0N0020.0f075.0+1020m

$ gdalinfo  --version
GDAL 1.6.0beta2, released 2008/11/12

Here is the code snippet where this error occurred.

       if (saveOk) {
                 // save TRE segments to dataset.
                 char            *treValue = NULL, *treName = NULL,  
*treContents = NULL;
                 char            *tre = "TRE_SENSRA";
                 char            **options = NULL;

                 parasite = gimp_image_parasite_find (image_ID, tre);
                 if (parasite != NULL) {

                 treValue = (char *) g_strndup(gimp_parasite_data  
(parasite),
                                       gimp_parasite_data_size  
(parasite));
                         gimp_parasite_free (parasite);
                         treName = g_strdup(tre+4);
                         IFDBG printf( "### saving TRE %s = %s\n",  
treName, treValue);

                         treContents = g_strconcat(treName, ",",  
treValue, NULL);
                         options = CSLSetNameValue( options, "TRE",  
treContents );
                         IFDBG printf( "### treContents = %s\n",  
*options);
                 }

                 dataset = GDALCreate( driver, filename, width,  
height, channels,
                                                  GDT_Byte, options );
                 if( dataset == NULL ){
                 g_warning("NITFview error opening dataset\n");
                         saved = FALSE;
         }

Do you have any suggestions why it can't parse the options?

Thanks;

Kurt Landrus
Progeny Systems Corp.
klandrus at progeny.net
Office: 	703-368-6107 x424
Lab: 	703-368-6107 x520



On Nov 13, 2008, at 8:30 PM, Frank Warmerdam wrote:

> Kurt Landrus wrote:
>> Ok, I was looking through nithfile.c,  am I correct in  
>> understanding that the only TRE supported for saving is BLOCKA, and  
>> that each additional TRE needs to be handled
>> individually?
>> I need to add support for the following TREs.  But I don't really  
>> need to add new SDE headers, but preserve the original values as read
>> using GDALGetMetadataItem.
>> SENSRA
>> AIMIDB
>> ACFTB
>> Is there an easy way to save back an TRE that was read using GDAL (/ 
>> 0 escaped string)
>> or should I pull out all the fields from the string, and then  
>> reassemble them in a function as is done for BLOCKA?
>
> Kurt,
>
> The GDAL trunk code (ie. 1.6 beta2) does include generic support for
> writing *image* TREs.  Each TRE needs to be in the creation options
> list as an item with TRE=<trename>=<content of tre> and the content  
> must be
> escaped using the BackslashQuotable scheme.
>
> This is exactly the same format the TREs are read into the TRE
> metadata domain.
>
> Currently there is no support for writing file TREs.
>
> Best regards,
> -- 
> --------------------------------------- 
> +--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for  
> Rent
>