[Gdal-dev] SetField & GetExtents Query

Daniel Morissette dmorissette at mapgears.com
Thu Aug 17 11:23:05 EDT 2006

Ben Crane wrote:
> Hi all,
> I'm having a great time with the PHP OGR library but
> have 2 questions:
> 1. I have used the SetField command and updated
> browser view, but how do I actually save this
> information into the core SHP files? I have tried
> CommitTransaction but seems to have no joy? I need to
> be able to update the core SHP file since it will be
> opened and used by others after the update.

Did you call OGR_L_SetFeature() to write the updated feature to the 
shapefile after setting the field values?


> 2. I have managed to get GetExtents to work, but how
> do I actually seperate the 4 coordinate pairs in the
> GetExtents object into 4 variables that I can use with
> the SVG ViewBox command...I've tried treating it as an
> array but had no joy.

I believe it's an associative array with 2 pairs of coordinates (not 4). 
Try print_r($extent_var); to see what it contains exactly.

Daniel Morissette

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