[mapguide-users] Zoom to selection

[Zac Spitzer]

checkout around line 109 in
WebServerExtensions\www\schemareport\showgeom.php for a good example

On 9/21/07, Kenneth, GEOGRAF A/S <ks at geograf.dk> wrote:
>
>  The only way I know of, is to issue a select of the objects on the
> datasource.
>  While reading the objects, you can get their envelope (aka mbr, bbox,
> etc..).
>  If you sum up alle the objects enevlopes, you can get the minimum rectangle
> in which all objects fit.
>  Once you have this box, your center, will be the center of the box, and the
> scale will be the width or height of the box.
>  Regards, Kenneth, GEOGRAF A/S
>
>
>
>  Ivan Milicevic skrev:
>  Hello,
>
> I wonder is it possible to calculate zoom extent on selected objects? For
> example, I have selected various type of objects (line, polygon, point) but
> I don't have any XY info in database on these objects. How can I calclate
> center point and scale in this case?
>
> Any help-advices are wellcome.
>
> Greetings,
>
> Ivan.
>
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>
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>


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Zac Spitzer
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