[Gdal-dev] extent of a file/map

[Frank Warmerdam]

Fulko van Westrenen wrote:
> Hello,
> 
> I have some python code to retrieve layer information from a
> s57 file. This works nice, but I would like to know the area 
> covered by a file.
> 
> The documentation suggests the use of GetExtent, but that is 
> for a layer. What is the proper way to get the extent of a file?

Fulko,

In general I think you would need to merge the extents of all the layers.
But I'm pretty sure that all S-57 layers return the extent of the whole
datasource so just using the extent of the first layer should be fine.

Best regards,
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