Martin,
Although I take your point about the interface not affecting ogr2ogr, surely the potential speed boost is worth extending to this utility too - or would that be a separate ticket? I for one would welcome improving the performance of ogr2ogr using the approach you have suggested - when I launch the current trunk development version of ogr2ogr from VBScript it gets stuck in an infinite loop trying to process a 5x5km vector data chunk. This issue aside, won't the fact that field names are constant but field numbers are not in the OS MasterMap vector data present problems for those that wish to programmatically parse the OS GML using your interface? Regards, Jez -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Martin Dobias Sent: Wednesday 21 July 2010 10:44 To: Jez Walters Cc: [email protected] Subject: Re: [gdal-dev] RFC 29: OGR Set Desired Fields Hi Jez On Wed, Jul 21, 2010 at 10:43 AM, Jez Walters <[email protected]> wrote: > Martin, > > > When I convert Ordnance Survey MasterMap GML to ESRI Shapefiles using > ogr2ogr, I'm getting different field numbers for the same field name in > different GML chunk files. Apologies if I have the wrong end of the stick, > but wouldn't your proposed interface therefore require me to invoke ogr2ogr > differently for each different GML chunk file, in order to accommodate the > different field ordering? The proposed API addition doesn't affect the behaviour of existing applications such as ogr2ogr. > Assuming I'm right, wouldn't it be more useable for the interface to use > field names rather than numbers? IMHO for developers it's easier to work with indexes of fields rather than with their names. Regards Martin _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. If you are not the addressee, any disclosure, reproduction, copying, distribution, or other dissemination or use of this communication is strictly prohibited. If you have received this transmission in error please notify the sender immediately and then delete this email. Any representations or commitments expressed in this email are subject to contract. This message has been scanned for viruses and dangerous content. However, it is essential that the recipient also checks this message using commercially available mail scanning and anti-virus software. IPL Information Processing Limited accepts no liability for any loss or damage resulting from any virus or other dangerous content in this message. IPL Information Processing Limited is registered in England and Wales under company registration number 1418818. Registration took place at Cardiff on 10 May 1979. IPL Information Processing Limited's registered office and normal place of business is Eveleigh House, Grove Street, Bath, BA1 5LR, United Kingdom. IPL is also registered for Value Added Tax (VAT) under registration number GB 601 2931 83. _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
