Message-ID: <DM5PR0401MB360597716168A2610002181FF4950@DM5PR0401MB3605.namprd04.prod.outlook.com>
Date: 2018-05-21T23:55:11Z
From: Shiva Khanal
Subject: Running spacetime eof on large raster stack
Hi,
I am trying to run the spatial empirical orthogonal function on a raster stack using eof function in spacetime 1.2-1 package.
My raster stack is
> stk
class : RasterStack
dimensions : 2423, 2470, 5984810, 690 (nrow, ncol, ncell, nlayers)
resolution : 499.9339, 499.9718 (x, y)
extent : -85163.44, 1149673, 5656775, 6868207 (xmin, xmax, ymin, ymax)
coord. ref. : NA
names : X2001.01.01, X2001.01.09, X2001.01.17, X2001.01.25, X2001.02.02, X2001.02.10, X2001.02.18, X2001.02.26, X2001.03.06, X2001.03.14, X2001.03.22, X2001.03.30, X2001.04.07, X2001.04.15, X2001.04.23, ...
min values : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ...
max values : 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100, ...
>object.size(stk)
8699416 bytes
The size of raster stack is ~8 mb but when I try to convert to STFDF it become several GBs until I receive error
about memory.
My system is
sysname release version machine
"Windows" ">= 8 x64" "build 9200" "x86-64"
>memory.limit()
[1] 32659
My R version is
"R version 3.5.0 (2018-04-23)"
I would appreciate any advise on possible solutions.
Thank you.
Shiva
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