I am trying to make a spatial query in MapX 5.0, where lines intersect a
grid of cells. I use the search function, something like this:
'grids is the grid selection (all grids are selected)
'lines is a layer with lines
set lyr = MapObject.Layers("Lines")
for each grid in grids
v.Add "gridftr", grid
set ftrs = lyr.search("obj intersects gridftr", v)
next
Unfortenately this seems not to work correctly. Either I get no selection or
I get a selection of all the lines. What goes wrong? Is this the right
approach?
What I really want is something that goes in MapInfo like this:
select * from layer_grid, layer_lines
where layer_grid.obj intersects layer_lines.obj
Thanks,
Harmen Smit
___________________________________________
Harmen Smit
Geodan IT bv
President Kennedylaan 1
1079 MB Amsterdam (NL)
Tel: +31 (0)20 - 5711 311
Fax: +31 (0)20 - 5711 333
Web: http://www.geodan.nl
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