[gdal-dev] updating a HFA image

[Limei Ran]

Hi Ivan:

I got rid of .aux and it worked right.

Thanks for all your help.

Limei

Lucena, Ivan wrote:

> Limei,
>
> When you do anything to a image file outside ArcGIS and you keep using 
> the same file name, remember to delete the .aux files.
>
> Ivan
>
>
> Limei Ran wrote:
>
>> Hi Frank:
>>
>> Thank you for your help.  I worked on the image created by 
>> CreateCopy().  It worked.  But, when I looked at the updated file in 
>> arcGIS.    It appears to be not updated.
>>
>> I used:
>> =============
>> poBand->RasterIO(GF_Write, 
>> c_col1-1,c_row1-1,c_nXSize,c_nYSize,poImage,c_nXSize,c_nYSize,GDT_Byte,0,0) 
>>
>> poRDataset->FlushCache();
>> GDALClose( (GDALDatasetH) poRDataset );
>> CPLFree (poImage);
>> =============
>>
>> Do I need to write the updated band to poRDataset after I use 
>> poBand->RasterIO or do something else?  The images are HFA format.
>>
>> Thanks,
>>
>> Limei
>>
>> Frank Warmerdam wrote:
>>
>>> Limei Ran wrote:
>>>
>>>> Hi Frank:
>>>>
>>>> The original image file was a USGS NLCD landuse image (I think it 
>>>> was created in the IMAGINE package).   I used 
>>>> poRDataset->GetDriver()->CopyFiles made a copy.  Then, I updated 
>>>> the copied file.  I will file a ticket with a small area result.
>>>
>>>
>>>
>>> Cool, thanks
>>>
>>>> For a quick solution, could I translate the image into an EHdr 
>>>> format image using gdal_translate and then update it with EHdr 
>>>> format or other better format you may suggest for reading a region 
>>>> from the image?
>>>
>>>
>>>
>>> That should work, or I presume you could even use the Driver 
>>> CreateCopy()
>>> method to copy the image contents, instead of literally copying all the
>>> component files.  This would give you a GDAL generated .img file that
>>> should hopefully be more safely updated.
>>>
>>> Best regards,
>>
>>
>>
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