OVERLAY POINT TOPOLOGY?!

[ColNew]

Dearest all,

I have two set of points with O.D. attached (points_1:data_1 and points_2:data_2). I want each point of the first set get the O.D. of the NEAREST point of the second set. Something like "point overlay". The problem is that AutoCAD Map can't overlay point topologies, and that makes sense, since entities don' t actually overlap. Any ideas, suggestions or improvisations would be much appreciated.

Colin

[Murph_Map]

Try creating a buffer from one of the points set then do the overlay. The buffer distance is the hard part so that they only overlap one point and not two. How close together are the points?

[ColNew]

Murph,

distances and geometry are totally chaotic and each time different, depending on the project. Distances fluctuate from 15 metres to 3 kilometres  I will try the buffer thing, see if it works

Colin

[thepworth]

quick thought - 

if you buffer a set of points and then intersect the buffer polygons with the second set of points, can you count the number of resulting points within each buffer polygon and stylize those with more than 1 point for "manual matching"  at least you'd get a little further along...

[parkr4st]

mapcgdist ; base option   can be used of you have a small number of set 1 points to relate the set b points and time to do some manual trial and error

given the point sets  A1 >>Ax  and B1 >>Bx in a 2D setting each point has x,y, in 3d x,y,z

2D - Radiating lines from any A to B1 >> Bx could be queried for the shortest line radiating from each A point

each point has x,y so each radii is the hypotenuse of a right triangle a1 x,y to b1 x,y; b2 x,y; bx x,y, etc

I threw up 3 a points and a bunch of random b points on two layers and output each set to sdf with x & y.  put the sdf x,y data  into an excel sheet and calclated the radii. a query can find the shorth radii for each "a" point

3d means a bit more complicated math.

dave

[thepworth]

Say, if this is someting going back towards Softdesk  / LDD points (or possibly Eaglepoint), it just occurs to me that if the text is all rotated around the points, the text objects should be held at a constant distance, just not in same orientation.  Therefore, it would probably be more successful to look at a "donut" versus a circular distance.  

Best of Luck!

[ColNew]

That's an unconventional yet brilliant point of view! However it doesnt overcome the manual part, which is a pain. Thank you all for your kind contribution, if I get a brainstorm with a does-it-all-in-5-seconds solution, I will post it here. Other suggestions are welcome,too.

Colin