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Questions tagged [parallel]

An R package for Parallel Computation

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1answer
3k views

Processing vector to raster faster with R

I am converting vector to raster in R. However the process was too long. Is there possibility to put the script into multithread or GPU processing in order to do it more faster? My script to ...
7
votes
1answer
746 views

Gdal won't read geotiff in parallel, but will read it in serial, and will read virtual raster in parallel. Why?

My algorithm takes a global dataset at 30m resolution, breaks it up into pieces, analyzes the pieces somehow, and writes the analyzed piece to disk. As all the pieces are independent, this is ...
3
votes
1answer
727 views

Multiple and Sequential Parallel from line

I have a vector line and I want to create multiple sequential parallel lines of this line. How can I do that ? For example, in AutoCAD you can do many offsets by a determined distance, and I want ...
2
votes
1answer
236 views

Changing parallel line length to split polygon in QGIS?

I have a polygon which I want to split with a selected line with a parallel line. I have made the parallel line but it's lenght is not enought to split the polygon. It necessary to be parallel with ...
0
votes
1answer
457 views

Applying SPEI::hargreaves function to time series from each pixel rasterbrick using R?

library(SPEI) library(raster) Basically, given a monthly time series for two variables a and b as follows: a = array(1:(3*4*12*64),c(3,4,12*64)) a = brick(a) dates=seq(as.Date("1950-01-01"), as....