Advanced buffer solution?

SimonFunder — Sun, 17 Mar 2013 10:29:48 GMT

Hi group,

I'm sitting with a task that I cannot get my head around:

I have a polygon theme of buildings that I first of all would like to make 'coarser', i.e. buildings within a certain distance of each other should be combined to a single large structure. Secondly I need to create an inside boundary in each of the buildings (red line in the image).

[ATTACH=CONFIG]22674[/ATTACH]

My first thought was to buffer the theme and dissolve all overlaps. I am aware that this will make the buildings extent to a larger area than they actually do, but this is ok for now. Then I would create an inside buffer to make the red line boundary.

The problem is that I cannot seem to be able to create square buffers. One solution I have found on the www is to first create a buffer, then use the feature envelope to polygon tool. However this solution doesn't work for this case, as the latter tool creates straight north-south 'pointing' rectangles. The same goes for creating the inside boundary.

Does anyone have any ideas of how I can solve this?

Thanks,
Simon

Re: Advanced buffer solution?

MelanieSummers — Wed, 20 Mar 2013 13:44:37 GMT

Hi Simon,

You may want to look into using the Aggregate Polygons tool.

In regards to your issue with the symbology, please try the following:

1. Open the Layer properties of the polygons > Symbology Tab
2. Select the Symbol > Edit Symbol...
3. Click the Add Layer (Plus sign) button, change the Color to No Color > Click Outline... > Edit Symbol...
4. Change the type to Cartographic Line Symbol > Line Properties Tab > Give the Line a negative offset > OK

Best,
Melanie S.

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Advanced buffer solution?

Re: Advanced buffer solution?