[R-sig-Geo] Step characteristics on raster maps (Mathieu Basille)

[Mathieu Basille]

Actually, I just found out this method for SpatialLines! Thanks for the 
suggestion, I'll run some tests with the different approaches and let 
the list know about the results of my investigations.

Thank you all for the help,
Mathieu.


Le 03/10/2010 12:09, Clément Calenge a écrit :
> Or, if you want to use this approach for your problem (transforming a
> line into a polygon and then rasterize), a solution would be to use the
> function "buffer" from the package adehabitatMA (on RForge), which
> calculates a buffer from a SpatialLines.
> Best regards,
>
> Clément.
>
>
> On 10/03/2010 05:59 PM, Mathieu Basille wrote:
>> Dear Arnaud,
>>
>> This is actually on my todo list, a test with the polygon approach,
>> although I'm not sure how to start to "polygonize" the segments... But
>> in the end, that would allow a performance comparison with different
>> approaches (and that would also allow the calculation of the
>> characteristics of buffers around the segments, which might be
>> interesting for us, too).
>>
>> Thanks for the suggestion,
>> Mathieu.
>>
>>
>> Le 03/10/2010 10:04, Arnaud Mosnier a écrit :
>>> Hi Mathieu,
>>>
>>> An easy workaround could be to convert each segment to a polygon doing a
>>> very small buffer around each segment then use the overlay method to
>>> obtain info in each of these polygon.
>>>
>>> Arnaud
>>
>
>

-- 

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Mathieu Basille, Post-Doc

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Département de Biologie
Université Laval, Québec

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