[mapguide-users] auto-computing map extents

[David Hequet]

Hi, 
You can use API to create a mgselection on a layer using an mgquery object
whith no filter.
Then you can get the MgSelection's MgEnveloppe.

As you can't change MapExtent during the runtime (i don't know if it's
possible with MGOS 2.0) you will have to create and execut your own
ZoomExtent method when the map is loaded

Beware of MGselection->GetEnveloppe (i don't remember the syntax), I had a
lot of Server Crash. It happen on know polygon but i don't know why (depend
on FDO provider? Or altered Oracle database..)

David Hequet


Jackie Ng wrote:
> 
> Hi All,
> 
> I am trying to bulk load a series of XML resources into MapGuide. Each
> Feature Source that gets loaded references a distinct SDF file stored in
> an externally aliased directory. All these SDF files share the same
> feature schema and classes. 
> 
> What I want to do is for each SDF file, is to load a series of templated
> xml resources (feature sources, layers, maps, web layouts, etc) into a
> location in the repository. I can process the feature sources and layers
> fine, but am stuck with the maps, because I know that they __will__ have
> different map extents.
> 
> Is there a way to automatically compute the visible map extents of a
> particular group of feature sources?
> 
> - Jackie
> 

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