[R-sig-Geo] strange issue of memory converting a raster to a data frame

[DUTRIEUX Loic]

Hi Sebastiano,

Try comparing terra::terraOptions() and terra::mem_info(r) on both systems. Just guessing there but it could be that terra is trying to do everything in memory and failing on your 16GB system, while taking a memory friendly route on your 8GB system.

Cheers,
Loïc
________________________________________
From: R-sig-Geo <r-sig-geo-bounces using r-project.org> on behalf of Sebastiano Trevisani <strevisani using iuav.it>
Sent: 23 January 2023 12:30:14
To: r-sig-geo
Subject: [R-sig-Geo] strange issue of memory converting a raster to a data frame

Dear list members,

In converting a raster as the one below to a data frame, I have an issue of
memory allocation only when I use a specific pc, and in particular the one
with more memory. To be more precise (using same version of R 4.2.2 and
Terra terra 1.6.47, by means of as.data.frame() function):

with a I5 processor with 8Gb of memory, windows 10 it works

with a I7 processor with 16gb of memory, windows 11 it doesn't

I'm not able to figure out a possible explanation!
Any suggestions on what to check?


SpatRaster
dimensions  : 5000, 5000, 18  (nrow, ncol, nlyr)
resolution  : 30, 30  (x, y)
extent      : -8526.878, 141473.1, 4110588, 4260588  (xmin, xmax, ymin,
ymax)
coord. ref. : WGS 84 / UTM zone 45N (EPSG:32645)
source      : multyMadRes2c.tif



Sebastiano

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