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

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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

If you have published anything based on these data, please notify us with a reference to your publication(s).

Global slope of forest land

Suggested citation:

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

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