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 Post subject: Overlapping polylines
PostPosted: Wed Jan 05, 2011 5:48 pm 
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Joined: Wed Jan 05, 2011 4:48 pm
Posts: 1
Hello everybody.
I have some building blocks (~400 blocks) [polygons] and street segments (~1000) [polylines] around them. I take random points (~7000) in the blocks and with Network Analyst and Closest Feauture I create new network dataset and take the shortest paths from a central point (Facility) to the 7000 points (Incidents). As a result 7000 routes [polylineM] are generated. My question is how can I find how many routes cross every street segment.

Here is what I' ve done: I make dissolve for the routes (with no fields and not check the button create multipart feautures) and I get a dissolve_routes [polylineM] shape with mutual street segments (~650 segs) of my route network but without counting the routes as I wanted.

So, later, I made Spatial Join the dissolve_routes (buffer of dissolve_routes) with all the routes to take the join_count field. However it never finishes (I left it for a day and no result). I also tried to take the spatial joins of the routes and the dissolve_routes_points (central x/y points of them) but the result was the same. Any ideas..?

One idea was to reduce my elements, but I want to have large regions with points up to ~50.000.
Any ideas would be helpfull. Thanks, John.

PostPosted: Thu Jan 06, 2011 11:09 pm 
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Joined: Thu Mar 13, 2008 7:37 pm
Posts: 113
Location: Jacksonville, Florida
I haven't touched routing in quite a while, but would a Frequency help? If the route(s) contain a unique id, a Frequency Analysis could be performed on the table to count the route occurrence. I use this option to find some the number of occurrences for data in my tables. If not id exist, you could easily create your own key.

Hope this helps!

GIS Manager

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