[mapguide-users] Select Within and ODBC feature source

[Plantech]

I noticed the same thing in MGE 2010 and made an inquiry to the Autodesk MGE
discussion forum.  Here is my observation.

I've come across problems with selecting objects spatially with Mapguide 
Enterprise.  It seems that when selecting objects (points) by buffer, 
radius, or polygon, it depends on the type of data source being used.  For 
spatial databases (sdf, shp) the selection area returns the correct points 
within the criteria.  However, if I use mapped points from an ODBC 
connection (Acess mdb or SQL 2000), the selected points are those contained 
with a bounding box of the selection area - thus additional points outside 
of the border of the selection area are returned based on the bounding box 
limits of the border.  This makes the use of non-spatial ODBC data points 
(data elements with x, y columns) almost worthless for selection by spatial 
means.  It appears that the spatial selection only works correctly with 
spatial entities.  Is this correct. Are there any other ways to accomplish 
this with x,y databases?

Dave Wilson replied that unfortunately this appears to be a bug.

Hope it gets fixed soon as this seems a major problem in multiple selection
approaches.

jer



Matteo wrote:
> 
> Hi all,
>   in my MGOS 2.0.2 project I have many layers from ODBC data sources (SQL
> Server tables). When I use the select within function me are also selected
> items that are outside the selected polygon. 
> Someone knows how to solve the problem?
> Regards,
> Matteo
> 

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