GHSL_tiles_per_region

The Global Human Settlement Layer (GHSL) divides the world into different rectangular tiles. To execute the Degree of Urbanisation in a memory-efficient manner, we grouped these tiles into 9 different regions. These regions are the smallest possible grouping of GHSL tiles, ensuring that no continuous land mass is split across two regions. By splitting the world into different parts, the RAM required to execute the Degree of Urbanisation is optimised. For a concrete example on how to use the regions to construct the grid classification on a global scale, see <code>vignette("vig3-DoU-global-scale")</code>.
The 9 regions cover approximately the following areas:<ul>
<li>W_AEA: Asia - Europe - Africa - Oceania (eastern hemisphere)</li>
<li>W_AME: North and South America (+ Greenland and Iceland)</li>
<li>W_ISL1: Hawaii</li>
<li>W_ISL2: Oceanic Islands (western hemisphere)</li>
<li>W_ISL3: Chatham Islands</li>
<li>W_ISL4: Scott Island</li>
<li>W_ISL5: Saint-Helena, Ascension and Tristan da Cunha</li>
<li>W_ISL6: French Southern and Antarctic Lands</li>
<li>W_ANT: Antarctica</li>
</ul><img src="figures/figure_GHSL_tiles_per_region.png?package=flexurba&version=0.2.3" alt="GHSL tiles">
For more information about the GHSL tiles and their extent see <a href="https://ghsl.jrc.ec.europa.eu/download.php">GHSL Download page</a>.

datasets

Enables the construction of flexible urban delineations that
can be tailored to specific applications or research questions, see Van
Migerode et al. (2024) <DOI:10.1177/23998083241262545> and Van Migerode
et al. (2025) <DOI:10.5281/zenodo.15173220>.
Originally developed to flexibly reconstruct the Degree of
Urbanisation classification of cities,
towns and rural areas developed by Dijkstra et al.
(2021) <DOI:10.1016/j.jue.2020.103312>. Now it also support a broader
range of delineation approaches, using multiple datasets – including
population, built-up area, and night-time light grids – and different
thresholding methods.

Céline Van Migerode

flexurba

Construct Flexible Urban Delineations

Ate Poorthuis

Ben Derudder

KU Leuven 

FWO 

GHSL_tiles_per_region function

<div class="section" id="ghsl-tiles-per-region">
<h3><code>GHSL_tiles_per_region</code></h3>
A named list of length 9:<ul>
<li>the names represent the 9 different regions (<code>W_AEA</code>, <code>W_AME</code>, <code>W_ISL1</code>, <code>W_ISL2</code>, <code>W_ISL3</code>, <code>W_ISL4</code>, <code>W_ISL5</code>, <code>W_ISL6</code>, <code>W_ANT</code>)</li>
<li>the elements are vectors with the GHSL tile ids that make up the regions</li>
</ul></div>

Format

The Global Human Settlement Layer (GHSL) divides the world into different rectangular tiles. To execute the Degree of Urbanisation in a memory-efficient manner, we grouped these tiles into 9 different regions. These regions are the smallest possible grouping of GHSL tiles, ensuring that no continuous land mass is split across two regions. By splitting the world into different parts, the RAM required to execute the Degree of Urbanisation is optimised. For a concrete example on how to use the regions to construct the grid classification on a global scale, see <code>vignette("vig3-DoU-global-scale")</code>.
The 9 regions cover approximately the following areas:<ul>
<li>W_AEA: Asia - Europe - Africa - Oceania (eastern hemisphere)</li>
<li>W_AME: North and South America (+ Greenland and Iceland)</li>
<li>W_ISL1: Hawaii</li>
<li>W_ISL2: Oceanic Islands (western hemisphere)</li>
<li>W_ISL3: Chatham Islands</li>
<li>W_ISL4: Scott Island</li>
<li>W_ISL5: Saint-Helena, Ascension and Tristan da Cunha</li>
<li>W_ISL6: French Southern and Antarctic Lands</li>
<li>W_ANT: Antarctica</li>
</ul>

<img src='figures/figure_GHSL_tiles_per_region.png' alt='GHSL tiles' />
For more information about the GHSL tiles and their extent see <a href='https://ghsl.jrc.ec.europa.eu/download.php'>GHSL Download page</a>.

Division of GHSL tiles in 9 regions — GHSL_tiles_per_region

<div class='section' id='ghsl-tiles-per-region'>
<h3><code>GHSL_tiles_per_region</code></h3>


A named list of length 9:<ul>
<li>the names represent the 9 different regions (<code>W_AEA</code>, <code>W_AME</code>, <code>W_ISL1</code>, <code>W_ISL2</code>, <code>W_ISL3</code>, <code>W_ISL4</code>, <code>W_ISL5</code>, <code>W_ISL6</code>, <code>W_ANT</code>)</li>
<li>the elements are vectors with the GHSL tile ids that make up the regions</li>
</ul>

</div>

GHSL_tiles_per_region: Division of GHSL tiles in 9 regions

Description

Usage

Arguments

Format

`GHSL_tiles_per_region`