[mapserver-users] buffer bounds (PHP Mapscript)

[Carlo Pelliconi]

Thank you very much Armin: it works!

Carlo

Armin Burger ha scritto:
> Carlo
>
> I don't know if this behaviour is a feature or a bug of PHP Mapscript 
> (I have not tested it with SWIG versions of Mapscript). A workaround 
> is to project the buffer in the same projection as the layer. Then the 
> extent is returned correctly. Something like
>
> $prj =  ms_newprojectionobj($queryLayer->getProjection());
> $buffer_polygon=$selected_shape->buffer($buffer_width);
> $buffer_polygon->project($prj, $prj);
> $shapebounds=$buffer_polygon->bounds;
>
> Armin
>
> On 11/04/2008 14:20, Carlo Pelliconi wrote:
>> Hi.
>> I'm trying to obtain automatic zoom on a buffer (which I want to see 
>> in map - and I do that) created around a selected feature.
>> I use
>>
>> $selected_shape=$queryLayer->getShape(...);
>> $buffer_polygon=$selected_shape->buffer($buffer_width);
>> $shapebounds=$buffer_polygon->bounds;
>>
>> This doesn't work: $buffer_shapebounds (which is a rectobj) is set to 
>> -1 -1 -1 -1 and used in setExtent it doesn't work.
>> If I apply the same code to a "real" shapefile (eg. the result of a 
>> getShape, without the buffer around), it works:
>>
>> $selected_shape=$queryLayer->getShape(...);
>> $shapebounds=$selected_shape->bounds;
>>
>> In this case $shapebounds is well defined and used in setExtent it 
>> works.
>>
>> Any idea or suggestion?
>> Thanks in advance
>>
>
>
>


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ing. Carlo Pelliconi
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