wpgpDownload

About

The WorldPop Global High Resolution Population Denominators Project, funded by the Bill and Melinda Gates Foundation (OPP1134076), has produced an open-access archive of 3-arc seconds (approximately 100m at the equator) gridded population datasets, also structured by gender and age groups, for 249 countries, dependencies, and territories for 21-years (2000-2020), using the methods described by Stevens et al., 2015 (https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0107042), Gaughan et al., 2016 (https://www.nature.com/articles/sdata20165), and Pezzulo et al., 2017 (https://www.nature.com/articles/sdata201789). In addition, the project has also made available the covariate datasets used as inputs to produce the gridded population datasets (Lloyd et al., under review). These datasets are available for download from the WorldPop website and FTP server using a range of methods and tools.

QuickStart

Install

pip install git+https://github.com/wpgp/wpgpDownloadPy

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List Isos (CLI)

To list all the available ISOs along with their ISO numeric/letter code and their English Name

$ wpgpDownload isos

List Isos (Python)

from wpgpDownload.utils.wpcsv import ISO_LIST
for iso in ISO_LIST:
    print(iso)

Download (CLI)

# list available downloads for Greece (GRC) having the 
# word distance in their description.
$ wpgpDownload download -i GRC -f distance --datasets


# List all the available datasets for an iso:
$ wpgpDownload download -i GRC --datasets

# download the datases with id 23456 and 23457
# Note the id's should exist.

$ wpgpDownload download -i GRC --id 23457 --id 23456

Download (Python)

from wpgpDownload.utils.convenience_functions import download_country_covariates as dl
dl(ISO='GRC', out_folder='.', prod_name='ccidadminl1')
dl('GRC','.',['ppp_2002','ppp_2013'])

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Explore (CLI)

(TODO)

Explore (Library)

(TODO)

Installation

It is recommended to create a new virtual environment with a modern python interpreter (>3.6) to isolate your installations from your default interpreter.

For more information on what is a virtual enviroment (ve), you can check Python's tutorial on the subject here.

Using pip, one can install the package directly from github :

pip install git+https://github.com/wpgp/wpgpDownloadPy

This should install the latest version into your active python environment.

API

The library contains both high-level and convience functions to browse and download WorldPop products.

If you want to explore which products are available at the at the WorldPop FTP server, you can do so by the from python like this:

from wpgpDownload.utils.wpcsv import Product

products = Product('GRC')  # Where instead of GRC it could be any valid ISO code.

#  to list all the products for GRC
for p in products:
    print('%s/%s\t%s\t%s' % (p.idx, p.country_name,p.dataset_name,p.path))
    # 91 Greece ppp_2000 GIS\Population\Global_2000_2020\2000\GRC\grc_ppp_2000.tif
    #340 Greece ppp_2001 GIS\Population\Global_2000_2020\2001\GRC\grc_ppp_2001.tif
    # ....

Other information that you can call from a Product:

• idx -> Position in the CSV file.
• alpha3 -> alphabetical ISO
• numeric -> Numerical ISO code
• country_name -> English Name of the Country
• dataset_name -> Covariate Name
• description -> Description of the Covariate
• path -> Ftp Path

# You can description_contains the products, focusing only on the products in which you are interested:
from wpgpDownload.utils.wpcsv import Product
products = Product('IRQ')
# as before but this time only list products that contain the word 'night' in their description:
results = products.description_contains('night')
for idx, p in results:
    print('%s/%s\t%s\t%s' % (idx, p.Name,p.CvtName,p.Path))

To get a set of all the currenly seving isos through the library you can do:

>>> from wpgpDownload.utils.wpcsv import ISO_LIST
>>> for iso in ISO_LIST:
       print(iso)
ABW
AFG
AGO
AIA
ALA
ALB
AND
ARE

Downloading Products

Products can be fetched from the FTP location either using the CLI or the built-in downloader

Using the CLI

The command-line method is the most straightforward to locate and download WorldPop products.

# To list all products for a specific ISO
$ wpgpDownload download -i GRC --datasets

To download ALL the products for that ISO:

# if -o is omitted, it will download by default into the working directory
$ wpgpDownload download -i GRC -o /dest/folder

To download specific datasets:

# Download ALL the datasets that
# contain the word 'distance' for Nepal (NPL)
$ wpgpDownload download -i NPL -f distance

To download individual datasets:

# list available downloads for Greece (GRC) having the word 'distance' in their description.
$ wpgpDownload download -f GRC -f distance --dataset

# download the datasets with id 23456 and 23457
$ wpgpDownload download -f GRC --id 23457 --id 23456

API

In a similar way, it is possible to download WorldPop datasets using the API:

from wpgpDownload.utils.convenience_functions import download_country_covariates as dl
# if you want one covatiate
dl(ISO='GRC',out_folder='.',prod_name='ccidadminl1')
# of multiple
dl('GRC','.',['ppp_2002','ppp_2013'])