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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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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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24 Replies
michaelcollins1
Frequent Contributor
What's your end goal here?
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GarrettRoss
Deactivated User
Basically I would like to have individual polygons intersection to intersection.
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michaelcollins1
Frequent Contributor
Do you then need to name the polygons etc? What do you fully need as a final product?
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TimWitt
Deactivated User
The only way I see is, creating a buffer around your points and using that polygon file to cut your street file.
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GarrettRoss
Deactivated User
Need a "new" polygon shapefile that has intersection to intersection polygons.
No need to name the polygons, though would be nice..
I will be using these individual polygons to calculate square feet and items contained within
each polygon for assest management.
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michaelcollins1
Frequent Contributor
I agree with Tim, but it could get messy.
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GarrettRoss
Deactivated User
I have tried the buffer option by doesn't  seem to work because of the intersections are not consistant in size or configuration, some our 2 leg, 3 leg, 4 leg, and 5 leg intersections.
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michaelcollins1
Frequent Contributor
That's the messy part. I think you're in for a lot of manual work here either way, unless you have a convenient road segment polyline file with width data included.
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GarrettRoss
Deactivated User
Someone in our organization has done this before but now I am tasked with reproducing an update and unable contact the person who originally completed the task. See the attached. somehow it looks as if lines where placed at the points on intersections and then processed.[ATTACH=CONFIG]29499[/ATTACH]
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