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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