[gdal-dev] Extract Extent or Bounding Box for a subset of shapes for a shapefile

[Luca Sigfrido Percich]

Thank you Chaitanya.

I think that this makes great sense when dealing with a summary of the
whole layer, especially because a lot of formats store the extent in the
layer metadata/header.

But if I need to dump all the features, or to get a dump or summary of a
filtered set of features (in which case I presume ogr will scan all the
features to apply the filter), checking for boundary limits shouldn't
add much cost to the already expensive operation.

Probably this goes beyond the intended scope of ogrinfo. And Matthew's
workaround works fine.

Thanks again

Sig



Il giorno ven, 22/04/2011 alle 20.20 +0530, Chaitanya kumar CH ha
scritto:
> Sig,
> 
> ogrinfo doesn't force the recomputation of extent. It is considered as
> a costly operation. ogrinfo just reports the stored extent.
> Whereas in ogr2ogr, creating a new file automatically computes the
> extents.