[Gdal-dev] Imagine overviews option

[Garrett Potts]

Hello FRank and others:

Actually it seems if anything were to be added it would be best to  
add it to the XML option string for the hfa dataset???
I am not sure if frank likes this or not but this would give a  
generic way, without changing any current interfaces, of specifying  
writer specific overview dataset creation options.

   <Option name='HFA_USE_RRD' type='boolean' description='Use  
external rrd file for overview building, default NO'/>

Not sure if this is what the create options was intended?  If not  
then maybe some other metadata NAME could be added for the HFA  
specific way of creating an overview?


Take care

Garrett

On Sep 16, 2005, at 12:24 PM, Frank Warmerdam wrote:

> On 9/16/05, Chapman, Martin <MChapman at sanz.com> wrote:
>
>> Frank,
>>
>> Can you add a new method that lets you specify the overview format  
>> type
>> (like void SetPyramidFormat(int nFormatTypeId); or something)?  That
>> would be really handy. :)
>>
>
> Martin,
>
> I gather you are suggesting this be a method on the GDALDataset?
> I am pretty hesitant to add new virtual methods on the GDALDataset
> unless I think they are really important to the data / access model.
>
> The CPLSetConfigOption() provides a mechanism to control it, but not
> in a dataset specific manner.  Were you wanting to be able to request
> particular datasets to use one kind of overviews, and particular  
> others
> to use a different kind of overviews?
>
> I think I might be better off extending the BuildOverview method to
> include an options list.
>
> 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
>
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