Global analysis of the slope of forest land

Creator/Principal investigator(s)

Mikael Lundbäck - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Henrik Persson - Swedish University of Agricultural Sciences, Department of Forest Resource Management

Carola Häggström - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Tomas Nordfjell - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Description

Forests of the world constitute one third of the total land area and are critical for e.g. carbon balance, biodiversity, water supply, and as source for bio-based products. Although the terrain within forest land has a great impact on accessibility, there is a lack of knowledge about the distribution of its variation in slope. The aim was to address that knowledge gap and create a globally consistent dataset of the distribution and area of forest land within different slope classes. A Geographic Information System (GIS) analysis was performed using the open source QGIS, GDAL, and R software. The core of the analysis was a digital elevation model and a forest cover mask, both with a final resolution of 90 metres. The total forest area according to the forest mask was 4.15 billion hectares whereof 82% was on slope less than 15°. The remaining 18% was distributed over the following slope classes, with 6% on a 15-20° slope, 8% on a 20-30° slope, and 4% on a slope >30°. Out of the major forestry countries, China had the largest proportion of forest steeper than 15° followed by Chile and India. A se

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Map

Responsible department/unit

Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Creator/Principal investigator(s)

Mikael Lundbäck - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Henrik Persson - Swedish University of Agricultural Sciences, Department of Forest Resource Management

Carola Häggström - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Tomas Nordfjell - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Identifiers

SND-ID: SND 1296

Description

Forests of the world constitute one third of the total land area and are critical for e.g. carbon balance, biodiversity, water supply, and as source for bio-based products. Although the terrain within forest land has a great impact on accessibility, there is a lack of knowledge about the distribution of its variation in slope. The aim was to address that knowledge gap and create a globally consistent dataset of the distribution and area of forest land within different slope classes. A Geographic Information System (GIS) analysis was performed using the open source QGIS, GDAL, and R software. The core of the analysis was a digital elevation model and a forest cover mask, both with a final resolution of 90 metres. The total forest area according to the forest mask was 4.15 billion hectares whereof 82% was on slope less than 15°. The remaining 18% was distributed over the following slope classes, with 6% on a 15-20° slope, 8% on a 20-30° slope, and 4% on a slope >30°. Out of the major forestry countries, China had the largest proportion of forest steeper than 15° followed by Chile and India. A se

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Language

English

Time period(s) investigated

2000 — 2013

Geographic spread

Geographic location: Australia, North America, Asia, Africa, Europe, South America, Oceania

Geographic description: Global, except from Antarctica, Greenland and other smaller areas without forests.

Funding

Department of Forest Biomaterials and Technology

Contact for questions about the data

Mikael Lundbäck

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Publications

Mikael Lundbäck, Henrik Persson, Carola Häggström, Tomas Nordfjell, Global analysis of the slope of forest land, Forestry: An International Journal Of Forest Research, 2020 DOI: 10.1093/forestry/cpaa021
DOI: https://doi.org/10.1093/forestry/cpaa021

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Global slope of forest land

Suggested citation

Mikael Lundbäck. Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology (2020). <em>Global slope of forest land</em>. Swedish National Data Service. Version 1. <a href="https://doi.org/10.5878/e7e8-rz29">https://doi.org/10.5878/e7e8-rz29</a>

Creator/Principal investigator(s)

Mikael Lundbäck - Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology

Description

Raster dataset in GeoTIFF format. The data is unprojected (EPSG: 4326) and the resolution is 90 m at most, however the map-unit is degrees.

Five files in total where the number in the filename indicates the proximity to the equator. File with number 1 covers the area from 0 to 49 degrees latitude, both north and south, number 2N covers latitude 50-59° north, number 2S covers latitude 50-59° south, number 3 covers latitude 60-69° north and number 4 covers latitude 70-79° north.

The GeoTIFF fil

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Data format / data structure

Geospatial

Data collection

Time period(s) for data collection:

Published: 2020-06-17