[R-sig-Geo] WorldClim Version2

Thu Oct 5 19:11:55 CEST 2017

Clever! Thanks.

From: Mirza Cengic <mirzaceng at gmail.com<mailto:mirzaceng at gmail.com>>
Date: Wednesday, October 4, 2017 at 10:32 AM
To: Marcelino de la Cruz Rot <marcelino.delacruz at urjc.es<mailto:marcelino.delacruz at urjc.es>>
Cc: Melanie Bacou <mel at mbacou.com<mailto:mel at mbacou.com>>, Andy Bunn <andy.bunn at wwu.edu<mailto:andy.bunn at wwu.edu>>, R-sig-Geo <r-sig-geo at r-project.org<mailto:r-sig-geo at r-project.org>>
Subject: Re: [R-sig-Geo] WorldClim Version2

Hi Andy,

for quick and dirty solution you can replace the url that the getData()
function reads for bioclim data. You can find the source code of the
function here https://github.com/cran/raster/blob/master/R/getData.R#L277 (note
that there's if/else flow for different resolutions of climate data). From
there you can make a custom function, or recompile the package if you
prefer it that way.

URL for the bioclimatic layers is
http://biogeo.ucdavis.edu/data/worldclim/v2.0/tif/base/wc2.0_RES_bio.zip,
where "RES" can be 10m, 5m, 2.5m, or 30s, and you'll need to play around a
bit with how the theurl string is being created in relation with the
resolution.

M

On Wed, Oct 4, 2017 at 2:00 PM, Mirza Cengic <m.cengic at science.ru.nl<mailto:m.cengic at science.ru.nl>> wrote:
Hi Andy,

for quick and dirty solution you can replace the url that the getData() function reads for bioclim data. You can find the source code of the function here <https://github.com/cran/raster/blob/master/R/getData.R#L277> (note that there's if/else flow for different resolutions of climate data). From there you can make a custom function, or recompile the package if you prefer it that way.

URL for the bioclimatic layers is http://biogeo.ucdavis.edu/data/worldclim/v2.0/tif/base/wc2.0_RES_bio.zip, where "RES" can be 10m, 5m, 2.5m, or 30s, and you'll need to play around a bit with how the theurl string is being created in relation with the resolution.

M

On Thu, Sep 28, 2017 at 9:44 AM, Marcelino de la Cruz Rot <marcelino.delacruz at urjc.es<mailto:marcelino.delacruz at urjc.es>> wrote:
I'm afraid it don't.

At least in version 2.5.8, as it  appears from  this line in .wordclim():

 theurl <- paste("http://biogeo.ucdavis.edu/data/climate/worldclim/1_4/grid/cur/",
            zip, sep = "")

Marcelino

El 28/09/2017 a las 4:31, Bacou, Melanie escribió:

I would assume `raster::getData("worldclim", ...)` uses WorldClim version 2?

--Mel.

On 09/25/2017 05:14 PM, Andy Bunn wrote:
Great. Thanks Marcelino. I have all the data dowloaded. I'm surprised that
there isn't a dedicated package for worldclim yet ‹ making one that ties
in with packages like BIEN would be great. Perhaps I'll work on it someday.

-A

On 9/25/17, 11:32 AM, "Marcelino de la Cruz Rot"
<marcelino.delacruz at urjc.es<mailto:marcelino.delacruz at urjc.es>>  wrote:

Hello Andy,

I've been using raster to play with WordlClim 2.0 and it works fine. For
example:

# Download 2.5' arc P data of worldclim 2.0
# The file is 68.5 MB so it takes some time to download
P_url<-
"http://biogeo.ucdavis.edu/data/worldclim/v2.0/tif/base/wc2.0_2.5m_prec.zi p"
download.file(P_url, destfile="wc2.0_2.5m_prec.zip")
unzip("wc2.0_2.5m_prec.zip")

#  Generate a stack object  with all monthly precipitation layers
P_filenames<- paste("wc2.0_2.5m_prec_", c(paste(0,1:9, sep=""), 11,12),
".tif",sep="")

prec2.5<- stack(P_filenames)

# Compute annual precipitation as a raster layer
P2.5<- sum(prec2.5)

# etc.

Cheers,

Marcelino

El 25/09/2017 a las 19:42, Andy Bunn escribió:
Hello all, is anybody aware of a R package that gracefully works with
version 2 of the WorldClim data?

http://worldclim.org/version2

I have all the data extracted locally but I'm wondering if there is
something akin to getData in raster that will work with version 2 and
not
1.4 as (the brilliant) raster package currently does.

Many thanks, Andy

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--
Marcelino de la Cruz Rot
Depto. de Biología y Geología
Física y Química Inorgánica
Universidad Rey Juan Carlos
Móstoles España

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Marcelino de la Cruz Rot
Depto. de Biología y Geología
Física y Química Inorgánica
Universidad Rey Juan Carlos
Móstoles España

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Mirza Čengić

Junior Researcher | Department of Environmental Science
Radboud University | Heyendaalseweg 135
6525 AJ Nijmegen | The Netherlands

+31 657020823<tel:+31%206%2057020823> | +38761908392<tel:+387%2061%20908%20392>
Skype: mirzacengic
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--
Mirza Čengić

Junior Researcher | Department of Environmental Science
Radboud University | Heyendaalseweg 135
6525 AJ Nijmegen | The Netherlands

+31 657020823 | +38761908392
Skype: mirzacengic
[http://tecd.client.shareholder.com/common/images/share/linkedin_icon.gif]<https://www.linkedin.com/in/mirzacengic>

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