[mapguide-users] RE: polyline layer from ODBC data feature

[Dave Wilson]

Although In theory I understand roughly what is involved I have never
tried doing this.

Basically you have to create the POLYLINE XY(x1 y1,x2 y2, xn yn)
definitions and endcode them into the appropriate data type in a table
in SQLServer. I've never done this. You can't read this definition (at
least with MapGuide)using ODBC and without the SQLServer provider in
MGOS you won't be able to read them.

At this point unless one of the developers has any extra insight I can't
really provide any more answers. It might be possible to modify the ODBC
provider to read a POLYLINE WKT format rather than just POINT data.

Regards,
Dave
-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of GM_Mizar
Sent: Friday, February 23, 2007 1:00 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] RE: polyline layer from ODBC data feature




Dave Wilson-3 wrote:
> 
> Firstly your primary feature class must contain the geometry. This is 
> the only geometry that will/can be displayed from a join.
> 
> Joined feature sources (secondary sources) are for attribute data 
> only, not to pick up additional geometries. Geometry from a join is 
> not used at this time.
> 
> It seems to me you really need 2 layers. One for the polylines and one

> for the points. They don't need to be joined together as you can't 
> combine the geometries from 2 different sources.
> 
> Regards,
> Dave
> 

Thanks a lot. I've another question: how can I define polylines geometry
starting from points into a sql server table? I can have points on my
map but I don't understand how to combinate them for lines...
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