How does MapInfo determine nearest map features? I have 2 road network layers, almost identical but offset slightly. I'm trying to write a query to fill a column in road layer A with the distance to the nearest equivalent arc in layer B. How?
Or an even simpler question: how can I find the distance between nearest points in the same layer? I've looked at the SQL query function : SphericalDistance( num_x , num_y , num_x2 , num_y2 , str ) -- I assume that could be the lat/long of the nearest point to the one whose column I am trying to insert the distance value. But other than physically double-clicking the nearest neighbour, and hand-copying its lat/long values into a 2nd column, I can't determine how to get MapInfo to automatically generate these values. I realise that this is a type of network analysis; so does that mean that I have to $$buy$$ another MapInfo product so I can do this work?? _______________________________________________ MapInfo-L mailing list [email protected] http://www.directionsmag.com/mailman/listinfo/mapinfo-l
