| dataset | url |
|---|---|
| EarthEnv-LandCover-v1.0 | https://earthenv.org//landcover |
| GLIMS-2007 | http://glims.colorado.edu/glacierdata/ :: http://www.glims.org/download/ |
EFG T6.1 Permanent snow – current maps
T6. Polar/alpine (cryogenic) biome
This page provides information about the valid indicative distribution map for the ecosystem functional group T6.1 Ice sheets, glaciers and perennial snowfields. For older or alternative maps, see here.
Methods
Here is the methods summary for Map code and version: T6.1.web.map v1.0.
Areas of permanent snow where identified from consensus land-cover maps (Tuanmu et al. 2014), glacier inventories (Raup et al 2007; GLIMS and NSIDC 2005-2018) and the Antarctic Land Cover map for 2000 (Hui et al. 2017). A composite map was created at 30 arc seconds spatial resolution in geographic projection.
Datasets
Antartica-LC-2000 (Hui et al. 2017):
Source of regional landcover product. Resolution: <1km2, static. Accuracy evaluation: >90%.
EarthEnv-LandCover-v1.0 (Tuanmu et al. 2014):
Source of global landcover product. Resolution: ca. 1km2, static. Accuracy evaluation: accuracy weighted consensus.
GLIMS-2007 (GLIMS and NSIDC 2005-2018):
Source of validated distribution records. Resolution: <1km2, static. Accuracy evaluation: quantitative (variable).
GLIMS-2007 (Raup et al 2007):
Source of validated distribution records. Resolution: <1km2, static. Accuracy evaluation: quantitative (variable).
Processing
Processing steps used in this map are: Buffering :: Reclassification :: Thresholds.
Map evaluation
This map is considered to be a Fine quality map based on the following characteristics:
Concept alignment is Direct,specific.
Ground observations are indirect.
The accuracy evaluation Quantitative accuracy assessment,documented,quantitative.
How to use the data
Available files
Following maps are considered current and valid indicative distribution maps for this ecosystem functional group. Web navigation maps are optimised for use in webapps, but they have similar methods and differ only in details of format and processing.
- Indicative Map (code: T6.1.IM.alt, version v2.0)
- Web navigation (code: T6.1.web.map, version v1.0)
You can download geospatial data for this map from the following sources:
T6.1.IM.alt (v2.0): Google Cloud bucket :: Zenodo repository (bundle of maps)
T6.1.web.map (v1.0): Google Cloud bucket :: Zenodo repository (bundle of maps) :: Zenodo repository (EFG map) :: Mapbox tileset :: Earth Engine assets
Note that you need to login to some services like mapbox or earthengine, and in some cases you also need to request access to the files.
License information
Indicative maps have been released with a 
Creative Commons Attribution 4.0 International license.
Datasets used to create this map might have some restriction for commercial use, see details below.
| dataset | license_info |
|---|---|
| Antartica-LC-2000 | https://creativecommons.org/licenses/by-sa/4.0/legalcode |
| EarthEnv-LandCover-v1.0 | https://www.re3data.org/repository/r3d100013469 :: https://creativecommons.org/licenses/by-nc/4.0/ |
References
References used in this version of the maps.
- Hui, F., J. Kang, Y. Liu, X. Cheng, P. Gong, F. Wang, Z. Li, Y. Ye, and Z. Guo. 2017. AntarcticaLC2000: The new Antarctic land cover database for the year 2000. SCIENCE CHINA Earth Sciences 60: 686-696. doi: 10.1007/s11430-016-0029-2.
- NA
- Tuanmu, M.-N. and W. Jetz (2014) A global 1-km consensus land-cover product for biodiversity and ecosystem modeling Global Ecology and Biogeography 23(9):1031–1045 DOI:10.1111/geb.12182
- Raup, B.H.; A. Racoviteanu; S.J.S. Khalsa; C. Helm; R. Armstrong; Y. Arnaud (2007) The GLIMS Geospatial Glacier Database: a New Tool for Studying Glacier Change Global and Planetary Change 56:101–110 DOI:10.1016/j.gloplacha.2006.07.018