[R-sig-Geo] Raster multi-band time series analysis

[Dominik Schneider]

Check out the spatial.tools package for parallel processing with the raster
package.



On Mon, Oct 26, 2015 at 7:22 AM, Loïc Dutrieux <loic.dutrieux at wur.nl> wrote:

> Hi Victor,
>
> I don't have much experience with beginCluster; however, I have written a
> parallel version of raster::calc a little while ago that uses forking.
> https://github.com/dutri001/bfastSpatial/blob/master/R/mc.calc.R
>
> calc and overlay are analogue so that it shouldn't be too hard to extend
> this function to overlay, using an undefined number of rasterStack or
> Bricks as input. You will need a bit more checks and control flow at the
> beginning of the function though.
> I'm not sure at all whether this is the most efficient way of
> parallelizing things, but it will for sure speed up your processing
> compared to single core processing.
>
> Hope this helps,
> Cheers,
> Loïc
>
>
> On 10/26/2015 12:23 PM, Victor Maus wrote:
>
>> Hi Loïc,
>>
>> Thank your very much for your answer. I am working on your suggestion.
>> But I still have a question.
>>
>> The function raster::overlay works for multiple RasterBrick objects.
>> However, I noticed that raster::beginCluster works with raster::overlay
>> as long as a single RasterStack or RasterBrick is provided as the first
>> argument. Do you have any suggestion for parallel processing of multiple
>> RasterBrick objects?
>>
>> Thank you!
>>
>> Best,
>> Victor
>>
>
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