[gdal-dev] OgrInfo ShapeFile Extents Report

David Baker (Geoscience) david.m.baker at chk.com
Mon Mar 8 19:53:51 EST 2010


Thanks...  Is there a method in org that scans all geometries or will I have to iterate through myself?


David M. Baker
Senior Geologist - Chief Technology Advisor
Chesapeake Energy Corporation
405-935-3715 office
405-496-5373 cell
david.m.baker at chk.com

-----Original Message-----
From: Frank Warmerdam [mailto:warmerdam at pobox.com]
Sent: Monday, March 08, 2010 6:51 PM
To: David Baker (Geoscience)
Cc: 'gdal-dev at lists.osgeo.org'
Subject: Re: [gdal-dev] OgrInfo ShapeFile Extents Report

David Baker (Geoscience) wrote:
> List,
> Does OgrInfo report the actual extents of the geometries in a ShapeFile
> or just the extents reported in the header of the ShapeFile?


GetExtent() is optimized by the shapefile driver to report the extents
from the file header rather than scanning the data as most drivers do.

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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