I'm having trouble understanding how the "Select Aggregates" system works.
I expect it to be similar to the "GROUP BY" SQL command.
But, on the test page:
http://localhost/mapguide/mapagent/selectfeaturesform.html
I have the fields "Properties" and "Computed Properties".
If I enter nothing in the "Properties" field, or the name of a spatial
column, I get a "Type error".
If I enter the name of an existing column, I get all the rows containing
this column.
The "Computed Properties" field seems to accept anything, and has no
effect on the output.
I would like to calculate the actual extents of the geometry of the
entire featuresource.
There seems to exist an FDO command called "SpatialExtents", but I don't
see how I
can use that function from MapGuide.
Any help is appreciated!
--
Regards, Kenneth Skovhede, GEOGRAF A/S
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