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Split / Divide large polygon with point shapefile

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12-02-2013 07:58 AM
GarrettRoss
Deactivated User
I have a large polygon shapefile that represents streets and a large point shapefile that represents intersections.
Is there a way to split the polygon shapefile at each intersection point?
[ATTACH=CONFIG]29493[/ATTACH]
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24 Replies
GarrettRoss
Deactivated User
I really appreciate your time and effort on this!
I attempted to reproduce what you had indicated, and it partially worked.
I think, due to my polygon shapefile being just a few large polygons is the reason that I am only getting one leg and not a multi-leg (spider effect) result.[ATTACH=CONFIG]29611[/ATTACH]
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michaelcollins1
Frequent Contributor
check the settings.

In my case, both fields named "none" are populated with zeros.
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GarrettRoss
Deactivated User
Both my files have a field "NewID" populated with zeros.
I tested my theory, used a different polygon shapefile with a few polygons and got the "spider effect".
It appears that because the road polygon is one large polygon I am not able to get the desired results.
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michaelcollins1
Frequent Contributor
You need to use the voids between the roads as your polygons. If you don't have that, create it using the "erase" tool under "overlay".
Create a polygon surrounding your roads, erase the road spaces, then explode the resultant polygon to create the voids.
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GarrettRoss
Deactivated User
With a couple of small sample test, it appears to be a success.

THANKS!
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