Global slope of forest land

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dc.contributor.authorMikael Lundbäck
dc.contributor.authorHenrik Persson
dc.contributor.authorCarola Häggström
dc.contributor.authorTomas Nordfjell
dc.date.accessioned2021-12-07T09:07:12Z
dc.date.available2021-12-07T09:07:12Z
dc.date.issued2020-06-17T12:10:47.192543Z
dc.descriptionDet har tidigare inte funnits någon global, jämförbar data om terränglutningen i skogsmark. Studien bakom detta dataset har fyllt denna kunskapslucka och presenterar ett globalt rasterdata med lutning i skogsmark, uppdelat i fyra kategorier från relativt platt till mycket brant. För mer information se den engelska sammanfattningen och själva artikeln.sv_SE
dc.descriptionSe engelsk beskrivning.sv_SE
dc.descriptionForests 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 sensitivity analysis with 20 metres resolution resulted in increased steep areas by 1 percent point in flat Sweden and by 11 percent points in steep Austria. In addition to country-specific and aggregated results of slope distribution and forest area, a global raster dataset is also made freely available, to cover user-specific areas that are not necessarily demarcated by country borders. Apart from predicting the regional possibilities for different harvesting equipment, which was the original idea behind this study, the results can be used to relate geographical forest variables to slope. The results could also be used in strategic forest fire fighting and large scale planning of forest conservation and management.en_EN
dc.descriptionRaster 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 files are in high resolution and are intended to be used with GIS software. We also provide PNG versions of the raster datasets, with XML geographic metadata, generated using GDAL in low resolution, to enable quick preview with a standard picture viewer.en_EN
dc.description.sponsorshipInstitutionen för Skogens Biomaterial och Teknologisv_SE
dc.description.sponsorshipDepartment of Forest Biomaterials and Technologyen_EN
dc.description.version1
dc.identifier.govdocSLU.sbt.2020.3.2.1-13
dc.identifier.urihttps://doi.org/10.5878/rchm-xn95
dc.identifier.urihttps://archive-harvest.slu.se:8443/jspui/handle/20.500.12703/3935
dc.language.isosv_SEsv_SE
dc.language.isoen_ENen_EN
dc.publisherSveriges lantbruksuniversitet, Institutionen för Skogens Biomaterial och Teknologisv_SE
dc.publisherSwedish University of Agricultural Sciences, Department of Forest Biomaterials and Technologyen_EN
dc.subjectskogshuggningsv_SE
dc.subjectskogsnäringsv_SE
dc.subjectskogbevuxen marksv_SE
dc.subjectAdministrativa enhetersv_SE
dc.subjectHöjdsv_SE
dc.subjectGeologisv_SE
dc.subjectLandtäckesv_SE
dc.subjectMarksv_SE
dc.subjectmetodsv_SE
dc.subjectcutting (forestry)en_EN
dc.subjectforestryen_EN
dc.subjectforested landen_EN
dc.subjectsustainable forestryen_EN
dc.subjectAdministrative unitsen_EN
dc.subjectElevationen_EN
dc.subjectGeologyen_EN
dc.subjectLand coveren_EN
dc.subjectSoilen_EN
dc.subjectmanagement typesen_EN
dc.subjectmethoden_EN
dc.titleGlobal slope of forest landsv_SE
dc.titleGlobal slope of forest landen_EN
dc.typedatasetsv_SE
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