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Buffer Question

February 15 2012 | 2 comments
Categories: Map Data

Creating Euclidean buffers is easy in ArcGIS, but how would I create a buffer that is built to a value? For instance I want to create a buffer around a town (point) based on a built value of 300 miles of streets (lines) from the town centroid. Simple euclidean buffers do not work for this, and I was wondering if it could be solved WITHOUT resorting to python or any other computer language. Thanks.

Mapping Center Answer:

I am not completely sure what you are asking but perhaps the Buffer or Multiple Ring Buffer tools will help. With these tools you input a value or values for the width of the buffer(s).

More info posted by Jason Sprung on Feb 16 2012 3:49PM
I will demonstrate in a simple easy to understand concept (refer to link) :

I have a point (we'll call it Town A) with many different streets and street segments that are near it all with different street segment lengths (streets). The circular buffer I need to create is a particular size to contain streets and street segments that would total up to 300 miles of streets/segments which intersect or contain end points that intersect streets that are in the town centroid i.e. i take a truck and drive on all the streets that intersect the center of town A and my odometer should read 300 miles. If I use the buffer tool it will build a buffer that is 300 miles in diameter although a buffer that size would contain 1000s of miles of streets.

https://mail-attachment.googleusercontent.com/attachment?ui=2&ik=43a6056329&view=att&th=1358878df76680e8&attid=0.1&disp=inline&realattid=f_gyqeyxud0&safe=1&zw&saduie=AG9B_P8pyoYpwVYUIary8O5ztgMr&sadet=1329436079201&sads=mxJTKBfZGNAVQC-zL6j9Qnq1nJg&sadssc=1
Not really a buffer - try service area analysis in posted by Aileen Buckley on Feb 19 2012 5:02PM
I cannot see your link as it seems to require a username and login, but what I think you are describing is not really a buffer. It sounds instead like you are trying to determine is the area can be accessed by driving for a certain period of time. This is a question that can be answered using Network Analyst. Take a look at this link to see if the 3rd example illustrates your problem: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//004700000001000000. If it does, then continue reading about Network Analyst to find out about service area analysis: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Service_area_analysis/004700000048000000/.

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