[geos-devel] left and right buffer

[Stephen Woodbridge]

Hah! It is probably that I am missing something. I didn't know you could 
apply a negative distance, but now that you mention it, that makes 
perfect sense. I will try it when I get a chance.

I return you to your regularly scheduled programming!

Thanks,
   -Steve

Martin Davis wrote:
> Am I missing something?  Isn't this the functionality that negative
> buffer distances gives today?
> 
> Martin Davis, Senior Technical Architect
> Vivid Solutions Inc.      www.vividsolutions.com
> Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5
> Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046
> 
> 
> 
>>-----Original Message-----
>>From: geos-devel-bounces at geos.refractions.net 
>>[mailto:geos-devel-bounces at geos.refractions.net] On Behalf Of 
>>Stephen Woodbridge
>>Sent: May 17, 2006 10:06 AM
>>To: GEOS Development List
>>Subject: Re: [geos-devel] left and right buffer
>>
>>
>>Hi Martin,
>>
>>I think a useful variant of this for polygons it to be able 
>>to specify 
>>inside or outside, so you could effectively grow and shrink 
>>the polygon.
>>
>>The "grow" option is great for finding abutters, and I think 
>>the buffer 
>>command today already does this.
>>
>>The "shrink" option is great for defining/showing boundary offsets 
>>within a lot that might be needed to insure zoning rules.
>>
>>-Steve
>>
>>Martin Davis wrote:
>>
>>>I'm curious what your use case is for this functionality.  Can you 
>>>post some sample data that you want L/R buffers for, and perhaps an 
>>>image of what you expect the results to look like?
>>>
>>>Martin Davis, Senior Technical Architect
>>>Vivid Solutions Inc.      www.vividsolutions.com
>>>Suite #1A-2328 Government Street Victoria, B.C. V8T 5G5
>>>Phone: (250) 385 6040 - Local 308 Fax: (250) 385 6046
>>>
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: geos-devel-bounces at geos.refractions.net
>>>>[mailto:geos-devel-bounces at geos.refractions.net] On Behalf Of 
>>>>zhangjing
>>>>Sent: May 17, 2006 12:10 AM
>>>>To: geos-devel at geos.refractions.net
>>>>Subject: [geos-devel] left and right buffer
>>>>
>>>>
>>>>hi,
>>>>
>>>>Is there any way in GEOS to calculate geometry's left or
>>>>right buffer ? 
>>>>
>>>>TIA
>>>>Jing Zhang
>>>>
>>>>	
>>>>
>>>>
>>>>
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>>>>
>>>
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>>
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> 
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