extracting 19 bioclim variables from single Tiff file of SSP scenerios

[shawkat sohel]

Hi,

Good day. Need suggestions regarding new worldclim scenario SSP data. Future projections have single TIF file with variables saved as bands within this file. How can I can extract them quickly in R? Please share some brief code?

Thank you.

Kind regards,

Sohel

[Fabio David Alabar]

Hola, 
por ejemplo para bio01

bio01<- raster("archivo_de_las_19_variables.tif", band=1)
espero que sirva.
SALUDOS

FABIO DAVID ALABAR

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De: max...@googlegroups.com <max...@googlegroups.com> en nombre de shawkat sohel <soh...@gmail.com>
Enviado: jueves, 11 de abril de 2024 21:56
Para: Maxent <max...@googlegroups.com>
Asunto: [maxent] extracting 19 bioclim variables from single Tiff file of SSP scenerios

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[shawkat sohel]

Hi, thank you. I want to extract all the bioclim variables together, not separately. Can you please share the codes?

Thank you.

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[Bede-Fazekas Ákos]

Dear Sohel,

This will read all BCV layers in a single RasterStack:
library(raster)
all_bcvs <- stack("filename.tif")

If you want to save each layers to separate geoTiff files, then something like this will do the job:
for (i in 1:19){
    writeRaster(x = all_bcvs[[i]], filename = paste0("bcv_", as.character(i)))
}

HTH,
Ákos
____________
Ákos Bede-Fazekas
Centre for Ecological Research, Hungary

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[Gebreyohannes Zenebe]

Hi Sohel,

Please use the script below.

God luck!

library(terra)
bioclim<-rast("D:/--/--/-.tif")
setwd("D:/--/--/--/")
for (i in 1:length(bioclim)) {
writeRaster(bioclim[[1]], names(bioclim[[i]]), format='GTiff')
}

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With kind regards,

Gebreyohannes Zenebe
MSc. in Geo-Information and Earth Observation Science for Natural Resources Management
Mobile: +251914757067

alternative email: g.ze...@seefconsult.com

[Gebreyohannes Zenebe]

Sorry Sohel,

Use this one.

library(terra)
bioclim<-rast("D:/--/--/-.tif")
setwd("D:/--/--/--/")
for (i in 1:length(bioclim)) {

terra::writeRaster(bioclim, paste0(names(bioclim), ".tif"))
}

On Fri, Apr 12, 2024 at 3:56 AM shawkat sohel <soh...@gmail.com> wrote:

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[shawkat sohel]

Hi All,

Thank you so much for your prompt reply. I found a way to extract bioclim variables from multiband tiff files using QGIS. 

Regarding the R codes, I was not able to install the GDAL and gdalUtils packages on my laptop (showing continuous error), which is why I used QGIS. 

Thank you.

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